/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:42:22,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:42:22,328 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:42:22,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:42:22,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:42:22,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:42:22,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:42:22,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:42:22,357 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:42:22,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:42:22,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:42:22,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:42:22,361 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:42:22,362 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:42:22,362 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:42:22,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:42:22,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:42:22,363 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:42:22,363 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:42:22,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:42:22,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:42:22,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:42:22,365 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:42:22,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:42:22,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:42:22,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:42:22,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:42:22,367 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:42:22,367 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:42:22,367 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:42:22,367 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:42:22,367 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:42:22,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:42:22,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:42:22,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:42:22,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:42:22,567 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:42:22,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.opt_bound2.i [2023-08-04 06:42:23,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:42:23,738 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:42:23,739 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.opt_bound2.i [2023-08-04 06:42:23,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91bf0bd45/fa3d9a8bb54b4f7c9c403222f81026be/FLAG1368fa6b1 [2023-08-04 06:42:24,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91bf0bd45/fa3d9a8bb54b4f7c9c403222f81026be [2023-08-04 06:42:24,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:42:24,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:42:24,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:42:24,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:42:24,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:42:24,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a9391e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24, skipping insertion in model container [2023-08-04 06:42:24,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,124 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:42:24,231 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.opt_bound2.i[951,964] [2023-08-04 06:42:24,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:42:24,393 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:42:24,403 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.opt_bound2.i[951,964] [2023-08-04 06:42:24,418 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:42:24,419 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:42:24,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:42:24,469 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:42:24,469 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:42:24,473 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:42:24,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24 WrapperNode [2023-08-04 06:42:24,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:42:24,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:42:24,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:42:24,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:42:24,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,507 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 205 [2023-08-04 06:42:24,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:42:24,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:42:24,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:42:24,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:42:24,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:42:24,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:42:24,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:42:24,579 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:42:24,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (1/1) ... [2023-08-04 06:42:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:42:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:42:24,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 06:42:24,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 06:42:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:42:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:42:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:42:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:42:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:42:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:42:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:42:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:42:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:42:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:42:24,706 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 06:42:24,849 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:42:24,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:42:25,216 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:42:25,420 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:42:25,421 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:42:25,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:42:25 BoogieIcfgContainer [2023-08-04 06:42:25,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:42:25,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:42:25,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:42:25,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:42:25,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:42:24" (1/3) ... [2023-08-04 06:42:25,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f089c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:42:25, skipping insertion in model container [2023-08-04 06:42:25,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:42:24" (2/3) ... [2023-08-04 06:42:25,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f089c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:42:25, skipping insertion in model container [2023-08-04 06:42:25,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:42:25" (3/3) ... [2023-08-04 06:42:25,429 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe008_power.opt_bound2.i [2023-08-04 06:42:25,434 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:42:25,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:42:25,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:42:25,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:42:25,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:42:25,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,657 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:42:25,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:25,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:42:25,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,670 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:42:25,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,680 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:25,724 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:42:25,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:25,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:42:25,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-08-04 06:42:31,579 INFO L134 LiptonReduction]: Checked pairs total: 8331 [2023-08-04 06:42:31,579 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-04 06:42:31,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:42:31,593 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@77065124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:42:31,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:42:31,599 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:42:31,599 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-04 06:42:31,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:31,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:31,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:42:31,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:42:31,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash 873810167, now seen corresponding path program 1 times [2023-08-04 06:42:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795253093] [2023-08-04 06:42:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:42:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:31,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795253093] [2023-08-04 06:42:31,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795253093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:31,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:42:31,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:42:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074273449] [2023-08-04 06:42:31,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:31,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:31,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:42:31,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 274 [2023-08-04 06:42:31,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:31,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:31,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 274 [2023-08-04 06:42:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:32,540 INFO L124 PetriNetUnfolderBase]: 2492/4029 cut-off events. [2023-08-04 06:42:32,540 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 06:42:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8038 conditions, 4029 events. 2492/4029 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23715 event pairs, 1010 based on Foata normal form. 150/3672 useless extension candidates. Maximal degree in co-relation 6982. Up to 2194 conditions per place. [2023-08-04 06:42:32,554 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 43 selfloop transitions, 2 changer transitions 8/55 dead transitions. [2023-08-04 06:42:32,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 231 flow [2023-08-04 06:42:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:42:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:42:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 06:42:32,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389294403892944 [2023-08-04 06:42:32,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 06:42:32,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 06:42:32,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:32,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 06:42:32,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:32,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:32,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:32,583 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 85 flow. Second operand 3 states and 443 transitions. [2023-08-04 06:42:32,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 231 flow [2023-08-04 06:42:32,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:42:32,587 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 69 flow [2023-08-04 06:42:32,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=81, 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=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 06:42:32,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-04 06:42:32,592 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 69 flow [2023-08-04 06:42:32,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:32,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:32,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:42:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:42:32,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:42:32,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1790104099, now seen corresponding path program 1 times [2023-08-04 06:42:32,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:32,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905711277] [2023-08-04 06:42:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:32,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:42:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905711277] [2023-08-04 06:42:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905711277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:32,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:42:32,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:42:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514175252] [2023-08-04 06:42:32,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:42:32,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:42:32,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:32,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:32,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:42:32,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:33,066 INFO L124 PetriNetUnfolderBase]: 1734/2811 cut-off events. [2023-08-04 06:42:33,066 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-08-04 06:42:33,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5738 conditions, 2811 events. 1734/2811 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14704 event pairs, 990 based on Foata normal form. 0/2621 useless extension candidates. Maximal degree in co-relation 5723. Up to 2665 conditions per place. [2023-08-04 06:42:33,077 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 28 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 06:42:33,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 143 flow [2023-08-04 06:42:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:42:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:42:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-04 06:42:33,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024330900243309 [2023-08-04 06:42:33,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-04 06:42:33,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-04 06:42:33,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:33,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-04 06:42:33,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,084 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 69 flow. Second operand 3 states and 413 transitions. [2023-08-04 06:42:33,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 143 flow [2023-08-04 06:42:33,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:42:33,085 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 73 flow [2023-08-04 06:42:33,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-04 06:42:33,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-04 06:42:33,086 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 73 flow [2023-08-04 06:42:33,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:33,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:42:33,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 06:42:33,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:42:33,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1736189203, now seen corresponding path program 1 times [2023-08-04 06:42:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:33,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121967962] [2023-08-04 06:42:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:33,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:42:33,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:33,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121967962] [2023-08-04 06:42:33,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121967962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:42:33,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383842637] [2023-08-04 06:42:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:33,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:42:33,154 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) [2023-08-04 06:42:33,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 06:42:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:33,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:42:33,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:42:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 06:42:33,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:42:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383842637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:33,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:42:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:42:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073268550] [2023-08-04 06:42:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:42:33,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:42:33,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:33,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:42:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:33,613 INFO L124 PetriNetUnfolderBase]: 1508/2380 cut-off events. [2023-08-04 06:42:33,614 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 06:42:33,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4730 conditions, 2380 events. 1508/2380 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11896 event pairs, 944 based on Foata normal form. 0/2240 useless extension candidates. Maximal degree in co-relation 4714. Up to 2222 conditions per place. [2023-08-04 06:42:33,621 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 31 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-04 06:42:33,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 157 flow [2023-08-04 06:42:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:42:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:42:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-04 06:42:33,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060827250608273 [2023-08-04 06:42:33,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-04 06:42:33,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-04 06:42:33,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:33,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-04 06:42:33,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,625 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 73 flow. Second operand 3 states and 416 transitions. [2023-08-04 06:42:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 157 flow [2023-08-04 06:42:33,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:42:33,627 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 77 flow [2023-08-04 06:42:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-04 06:42:33,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-04 06:42:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 77 flow [2023-08-04 06:42:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:33,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:42:33,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 06:42:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:33,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:42:33,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1192957064, now seen corresponding path program 1 times [2023-08-04 06:42:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850107200] [2023-08-04 06:42:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:33,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 06:42:33,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850107200] [2023-08-04 06:42:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850107200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:42:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582243183] [2023-08-04 06:42:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:33,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:42:33,892 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) [2023-08-04 06:42:33,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 06:42:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:34,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:42:34,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:42:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:42:34,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:42:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582243183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:34,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:42:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:42:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211861926] [2023-08-04 06:42:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:42:34,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 274 [2023-08-04 06:42:34,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:34,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 274 [2023-08-04 06:42:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:34,319 INFO L124 PetriNetUnfolderBase]: 1384/2096 cut-off events. [2023-08-04 06:42:34,320 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-04 06:42:34,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 2096 events. 1384/2096 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9980 event pairs, 838 based on Foata normal form. 0/2011 useless extension candidates. Maximal degree in co-relation 4286. Up to 1766 conditions per place. [2023-08-04 06:42:34,327 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 34 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-08-04 06:42:34,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 173 flow [2023-08-04 06:42:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:42:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:42:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-04 06:42:34,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097323600973236 [2023-08-04 06:42:34,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-04 06:42:34,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-04 06:42:34,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:34,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-04 06:42:34,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,331 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 77 flow. Second operand 3 states and 419 transitions. [2023-08-04 06:42:34,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 173 flow [2023-08-04 06:42:34,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 169 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:42:34,332 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 81 flow [2023-08-04 06:42:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 06:42:34,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-04 06:42:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 81 flow [2023-08-04 06:42:34,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:34,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:42:34,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 06:42:34,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 06:42:34,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:42:34,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1766448327, now seen corresponding path program 1 times [2023-08-04 06:42:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:34,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481424466] [2023-08-04 06:42:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:34,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:42:34,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:34,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481424466] [2023-08-04 06:42:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481424466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:42:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362447985] [2023-08-04 06:42:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:42:34,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:42:34,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 06:42:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:34,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:42:34,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:42:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:42:34,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:42:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:42:34,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362447985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:42:34,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:42:34,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:42:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096295928] [2023-08-04 06:42:34,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:42:34,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:42:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:42:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:42:34,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 274 [2023-08-04 06:42:34,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:34,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 274 [2023-08-04 06:42:34,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:42:34,763 INFO L124 PetriNetUnfolderBase]: 8/25 cut-off events. [2023-08-04 06:42:34,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:34,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 25 events. 8/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 57. Up to 18 conditions per place. [2023-08-04 06:42:34,763 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 06:42:34,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 13 transitions, 57 flow [2023-08-04 06:42:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:42:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:42:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:42:34,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726277372262774 [2023-08-04 06:42:34,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:42:34,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:42:34,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:42:34,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:42:34,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,768 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,768 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 81 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:42:34,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 13 transitions, 57 flow [2023-08-04 06:42:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 55 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:42:34,768 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 06:42:34,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 06:42:34,769 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -22 predicate places. [2023-08-04 06:42:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 06:42:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:34,771 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:42:34,771 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:42:34,771 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:42:34,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 06:42:34,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:42:34,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 06:42:34,979 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:42:34,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:35,007 INFO L124 PetriNetUnfolderBase]: 30/467 cut-off events. [2023-08-04 06:42:35,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:35,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 467 events. 30/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 288. Up to 16 conditions per place. [2023-08-04 06:42:35,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 148 transitions, 311 flow [2023-08-04 06:42:35,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 119 transitions, 253 flow [2023-08-04 06:42:35,008 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:42:35,008 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:42:35,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 119 transitions, 253 flow [2023-08-04 06:42:35,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 119 transitions, 253 flow [2023-08-04 06:42:35,020 INFO L124 PetriNetUnfolderBase]: 6/235 cut-off events. [2023-08-04 06:42:35,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:35,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 235 events. 6/235 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 626 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2023-08-04 06:42:35,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 1452 [2023-08-04 06:42:39,710 INFO L134 LiptonReduction]: Checked pairs total: 4612 [2023-08-04 06:42:39,710 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 06:42:39,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:42:39,711 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@77065124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:42:39,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:42:39,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:42:39,714 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 06:42:39,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:39,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:39,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:42:39,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:42:39,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash -103417967, now seen corresponding path program 1 times [2023-08-04 06:42:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:39,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968808593] [2023-08-04 06:42:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:39,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:42:39,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:42:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:42:39,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:42:39,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:42:39,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:42:39,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:42:39,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:42:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:42:39,786 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:42:39,787 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:42:39,787 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:42:39,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:42:39,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:42:39,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:39,924 INFO L124 PetriNetUnfolderBase]: 93/1396 cut-off events. [2023-08-04 06:42:39,925 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:42:39,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1396 events. 93/1396 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9424 event pairs, 0 based on Foata normal form. 0/1235 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 06:42:39,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:39,934 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:39,934 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:42:39,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:39,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:39,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 173 transitions, 382 flow [2023-08-04 06:42:40,038 INFO L124 PetriNetUnfolderBase]: 93/1396 cut-off events. [2023-08-04 06:42:40,038 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:42:40,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 1396 events. 93/1396 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9424 event pairs, 0 based on Foata normal form. 0/1235 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-04 06:42:40,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 6560 [2023-08-04 06:42:46,905 INFO L134 LiptonReduction]: Checked pairs total: 23760 [2023-08-04 06:42:46,905 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-04 06:42:46,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:42:46,909 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@77065124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:42:46,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:42:46,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:42:46,911 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-04 06:42:46,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:42:46,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:42:46,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:42:46,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:42:46,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:42:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1283048569, now seen corresponding path program 1 times [2023-08-04 06:42:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:42:46,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571678982] [2023-08-04 06:42:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:42:46,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:42:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:42:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:42:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:42:46,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571678982] [2023-08-04 06:42:46,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571678982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:42:46,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:42:46,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:42:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117436105] [2023-08-04 06:42:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:42:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:42:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:42:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:42:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:42:46,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 307 [2023-08-04 06:42:46,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:42:46,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:42:46,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 307 [2023-08-04 06:42:46,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:44:20,071 INFO L124 PetriNetUnfolderBase]: 584082/738978 cut-off events. [2023-08-04 06:44:20,071 INFO L125 PetriNetUnfolderBase]: For 10864/10864 co-relation queries the response was YES. [2023-08-04 06:44:21,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483709 conditions, 738978 events. 584082/738978 cut-off events. For 10864/10864 co-relation queries the response was YES. Maximal size of possible extension queue 16702. Compared 4909103 event pairs, 129702 based on Foata normal form. 16317/680270 useless extension candidates. Maximal degree in co-relation 1064071. Up to 614901 conditions per place. [2023-08-04 06:44:23,864 INFO L140 encePairwiseOnDemand]: 301/307 looper letters, 75 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-04 06:44:23,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 389 flow [2023-08-04 06:44:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:44:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:44:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-04 06:44:23,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5646036916395223 [2023-08-04 06:44:23,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-04 06:44:23,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-04 06:44:23,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:44:23,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-04 06:44:23,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:44:23,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:44:23,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:44:23,869 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 144 flow. Second operand 3 states and 520 transitions. [2023-08-04 06:44:23,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 389 flow [2023-08-04 06:44:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 383 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 06:44:23,875 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 157 flow [2023-08-04 06:44:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-08-04 06:44:23,875 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-04 06:44:23,875 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 157 flow [2023-08-04 06:44:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:44:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:44:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:44:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:44:23,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:44:23,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:44:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 798250218, now seen corresponding path program 1 times [2023-08-04 06:44:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:44:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733497202] [2023-08-04 06:44:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:44:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:44:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:44:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:44:23,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:44:23,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733497202] [2023-08-04 06:44:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733497202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:44:23,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:44:23,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:44:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813272789] [2023-08-04 06:44:23,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:44:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:44:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:44:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:44:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:44:23,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 307 [2023-08-04 06:44:23,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:44:23,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:44:23,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 307 [2023-08-04 06:44:23,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand