/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix028_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:30:13,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:30:13,251 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:30:13,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:30:13,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:30:13,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:30:13,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:30:13,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:30:13,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:30:13,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:30:13,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:30:13,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:30:13,301 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:30:13,302 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:30:13,302 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:30:13,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:30:13,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:30:13,303 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:30:13,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:30:13,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:30:13,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:30:13,304 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:30:13,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:30:13,304 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:30:13,305 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:30:13,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:30:13,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:30:13,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:30:13,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:30:13,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:30:13,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:30:13,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:30:13,308 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:30:13,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:30:13,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:30:13,309 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:30:13,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:30:13,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:30:13,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:30:13,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:30:13,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:30:13,599 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:30:13,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix028_tso_bound2.i [2023-08-03 23:30:14,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:30:14,947 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:30:14,948 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix028_tso_bound2.i [2023-08-03 23:30:14,969 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46511e17f/676bd27340eb4b1b98b335d621e2c681/FLAG8bfda493d [2023-08-03 23:30:14,982 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46511e17f/676bd27340eb4b1b98b335d621e2c681 [2023-08-03 23:30:14,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:30:14,985 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:30:14,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:30:14,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:30:14,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:30:14,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:30:14" (1/1) ... [2023-08-03 23:30:14,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a44582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:14, skipping insertion in model container [2023-08-03 23:30:14,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:30:14" (1/1) ... [2023-08-03 23:30:15,027 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:30:15,151 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_mix028_tso_bound2.i[944,957] [2023-08-03 23:30:15,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:30:15,314 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:30:15,324 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_mix028_tso_bound2.i[944,957] [2023-08-03 23:30:15,331 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:30:15,333 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:30:15,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:30:15,388 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:30:15,388 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:30:15,394 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:30:15,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15 WrapperNode [2023-08-03 23:30:15,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:30:15,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:30:15,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:30:15,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:30:15,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,459 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 189 [2023-08-03 23:30:15,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:30:15,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:30:15,461 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:30:15,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:30:15,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,475 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:30:15,494 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:30:15,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:30:15,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:30:15,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (1/1) ... [2023-08-03 23:30:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:30:15,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:30:15,546 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) [2023-08-03 23:30:15,571 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 [2023-08-03 23:30:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:30:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:30:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:30:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:30:15,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:30:15,586 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:30:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:30:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:30:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:30:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:30:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:30:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:30:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:30:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:30:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:30:15,589 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:30:15,756 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:30:15,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:30:16,077 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:30:16,235 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:30:16,235 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:30:16,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:30:16 BoogieIcfgContainer [2023-08-03 23:30:16,238 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:30:16,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:30:16,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:30:16,243 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:30:16,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:30:14" (1/3) ... [2023-08-03 23:30:16,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5fd60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:30:16, skipping insertion in model container [2023-08-03 23:30:16,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:30:15" (2/3) ... [2023-08-03 23:30:16,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5fd60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:30:16, skipping insertion in model container [2023-08-03 23:30:16,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:30:16" (3/3) ... [2023-08-03 23:30:16,247 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix028_tso_bound2.i [2023-08-03 23:30:16,255 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:30:16,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:30:16,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:30:16,262 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:30:16,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:30:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 129 transitions, 273 flow [2023-08-03 23:30:16,438 INFO L124 PetriNetUnfolderBase]: 30/454 cut-off events. [2023-08-03 23:30:16,439 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:30:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 454 events. 30/454 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2018 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-03 23:30:16,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 129 transitions, 273 flow [2023-08-03 23:30:16,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 215 flow [2023-08-03 23:30:16,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:30:16,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-03 23:30:16,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-03 23:30:16,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 215 flow [2023-08-03 23:30:16,522 INFO L124 PetriNetUnfolderBase]: 6/222 cut-off events. [2023-08-03 23:30:16,523 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:30:16,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 222 events. 6/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 673 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-08-03 23:30:16,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 1328 [2023-08-03 23:30:19,385 INFO L134 LiptonReduction]: Checked pairs total: 3244 [2023-08-03 23:30:19,385 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-03 23:30:19,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:30:19,403 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;@653ba1bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:30:19,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:30:19,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:30:19,408 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:30:19,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:30:19,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:19,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:30:19,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:30:19,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:30:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash -729247663, now seen corresponding path program 1 times [2023-08-03 23:30:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:30:19,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125680830] [2023-08-03 23:30:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:30:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:30:19,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:30:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:30:19,570 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:30:19,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:30:19,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:30:19,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:30:19,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:30:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:30:19,575 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:30:19,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:30:19,579 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:30:19,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:30:19,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:30:19,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:30:19,830 INFO L124 PetriNetUnfolderBase]: 93/1409 cut-off events. [2023-08-03 23:30:19,831 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:30:19,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 1409 events. 93/1409 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9823 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-03 23:30:19,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:30:19,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 286 flow [2023-08-03 23:30:19,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:30:19,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:30:19,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:30:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 125 transitions, 286 flow [2023-08-03 23:30:19,924 INFO L124 PetriNetUnfolderBase]: 12/626 cut-off events. [2023-08-03 23:30:19,924 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:30:19,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 626 events. 12/626 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3299 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 492. Up to 27 conditions per place. [2023-08-03 23:30:19,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 3744 [2023-08-03 23:30:22,838 INFO L134 LiptonReduction]: Checked pairs total: 11616 [2023-08-03 23:30:22,838 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-03 23:30:22,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:30:22,841 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;@653ba1bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:30:22,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:30:22,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:30:22,852 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-08-03 23:30:22,852 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:30:22,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:22,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:30:22,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:30:22,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:30:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -270412711, now seen corresponding path program 1 times [2023-08-03 23:30:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:30:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225247683] [2023-08-03 23:30:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:30:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:30:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:30:23,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225247683] [2023-08-03 23:30:23,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225247683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:30:23,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:30:23,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:30:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492641686] [2023-08-03 23:30:23,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:30:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:30:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:30:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:30:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:30:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-03 23:30:23,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-03 23:30:23,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:30:23,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-03 23:30:23,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:30:32,938 INFO L124 PetriNetUnfolderBase]: 78164/106182 cut-off events. [2023-08-03 23:30:32,938 INFO L125 PetriNetUnfolderBase]: For 5244/5244 co-relation queries the response was YES. [2023-08-03 23:30:33,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212693 conditions, 106182 events. 78164/106182 cut-off events. For 5244/5244 co-relation queries the response was YES. Maximal size of possible extension queue 3440. Compared 723220 event pairs, 63366 based on Foata normal form. 0/98295 useless extension candidates. Maximal degree in co-relation 61026. Up to 100362 conditions per place. [2023-08-03 23:30:33,766 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 36 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-03 23:30:33,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 212 flow [2023-08-03 23:30:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:30:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:30:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-03 23:30:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2023-08-03 23:30:33,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-03 23:30:33,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-03 23:30:33,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:30:33,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-03 23:30:33,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2023-08-03 23:30:33,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-03 23:30:33,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-03 23:30:33,795 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 417 transitions. [2023-08-03 23:30:33,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 212 flow [2023-08-03 23:30:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 206 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:30:33,815 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-03 23:30:33,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-03 23:30:33,819 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-03 23:30:33,820 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-03 23:30:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-03 23:30:33,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:33,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:30:33,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:30:33,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:30:33,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:30:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1394677288, now seen corresponding path program 1 times [2023-08-03 23:30:33,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:30:33,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518946047] [2023-08-03 23:30:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:33,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:30:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:30:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:30:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518946047] [2023-08-03 23:30:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518946047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:30:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011157674] [2023-08-03 23:30:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:33,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:30:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:30:33,907 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) [2023-08-03 23:30:33,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:30:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:34,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:30:34,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:30:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:30:34,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:30:34,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011157674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:30:34,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:30:34,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:30:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817149350] [2023-08-03 23:30:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:30:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:30:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:30:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:30:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:30:34,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-03 23:30:34,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-03 23:30:34,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:30:34,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-03 23:30:34,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:30:42,799 INFO L124 PetriNetUnfolderBase]: 78152/106137 cut-off events. [2023-08-03 23:30:42,799 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2023-08-03 23:30:43,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212195 conditions, 106137 events. 78152/106137 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 3434. Compared 719368 event pairs, 52272 based on Foata normal form. 9/98286 useless extension candidates. Maximal degree in co-relation 75651. Up to 100315 conditions per place. [2023-08-03 23:30:43,547 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 39 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-03 23:30:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 234 flow [2023-08-03 23:30:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:30:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:30:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-03 23:30:43,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2023-08-03 23:30:43,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-03 23:30:43,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-03 23:30:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:30:43,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-03 23:30:43,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 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) [2023-08-03 23:30:43,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-03 23:30:43,559 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-03 23:30:43,559 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 669 transitions. [2023-08-03 23:30:43,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 234 flow [2023-08-03 23:30:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:30:43,561 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-03 23:30:43,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-03 23:30:43,562 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-03 23:30:43,562 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-03 23:30:43,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-03 23:30:43,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:43,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:30:43,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 23:30:43,768 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 [2023-08-03 23:30:43,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:30:43,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:30:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -246240464, now seen corresponding path program 1 times [2023-08-03 23:30:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:30:43,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916750879] [2023-08-03 23:30:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:43,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:30:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:30:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:30:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916750879] [2023-08-03 23:30:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916750879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:30:43,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009559772] [2023-08-03 23:30:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:43,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:30:43,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:30:43,881 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) [2023-08-03 23:30:43,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:30:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:43,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:30:43,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:30:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:30:43,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:30:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009559772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:30:43,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:30:43,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:30:43,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127895884] [2023-08-03 23:30:43,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:30:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:30:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:30:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:30:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:30:43,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-03 23:30:43,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-03 23:30:43,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:30:43,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-03 23:30:43,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:30:52,196 INFO L124 PetriNetUnfolderBase]: 75822/102696 cut-off events. [2023-08-03 23:30:52,196 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2023-08-03 23:30:52,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205755 conditions, 102696 events. 75822/102696 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 3401. Compared 693304 event pairs, 59934 based on Foata normal form. 0/95772 useless extension candidates. Maximal degree in co-relation 59168. Up to 96840 conditions per place. [2023-08-03 23:30:52,813 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 42 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 23:30:52,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 256 flow [2023-08-03 23:30:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:30:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:30:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-03 23:30:52,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2023-08-03 23:30:52,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-03 23:30:52,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-03 23:30:52,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:30:52,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-03 23:30:52,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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) [2023-08-03 23:30:52,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-03 23:30:52,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-03 23:30:52,819 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 422 transitions. [2023-08-03 23:30:52,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 256 flow [2023-08-03 23:30:52,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 249 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:30:52,821 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-03 23:30:52,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-03 23:30:52,822 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-03 23:30:52,823 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-03 23:30:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-03 23:30:52,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:52,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:30:52,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:30:53,026 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 [2023-08-03 23:30:53,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:30:53,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:30:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1186785435, now seen corresponding path program 1 times [2023-08-03 23:30:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:30:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145159869] [2023-08-03 23:30:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:30:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:30:53,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:30:53,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145159869] [2023-08-03 23:30:53,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145159869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:30:53,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117598280] [2023-08-03 23:30:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:30:53,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:30:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:30:53,091 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) [2023-08-03 23:30:53,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:30:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:30:53,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:30:53,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:30:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:30:53,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:30:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:30:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117598280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:30:53,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:30:53,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:30:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706615827] [2023-08-03 23:30:53,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:30:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:30:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:30:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:30:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:30:53,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-03 23:30:53,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-03 23:30:53,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:30:53,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-03 23:30:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:30:59,450 INFO L124 PetriNetUnfolderBase]: 59515/79676 cut-off events. [2023-08-03 23:30:59,451 INFO L125 PetriNetUnfolderBase]: For 3708/3708 co-relation queries the response was YES. [2023-08-03 23:30:59,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160026 conditions, 79676 events. 59515/79676 cut-off events. For 3708/3708 co-relation queries the response was YES. Maximal size of possible extension queue 2729. Compared 508727 event pairs, 38349 based on Foata normal form. 3/74666 useless extension candidates. Maximal degree in co-relation 56847. Up to 75373 conditions per place. [2023-08-03 23:30:59,922 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 40 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 23:30:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 249 flow [2023-08-03 23:30:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:30:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:30:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2023-08-03 23:30:59,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2023-08-03 23:30:59,925 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2023-08-03 23:30:59,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2023-08-03 23:30:59,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:30:59,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2023-08-03 23:30:59,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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) [2023-08-03 23:30:59,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:30:59,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:30:59,929 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 543 transitions. [2023-08-03 23:30:59,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 249 flow [2023-08-03 23:30:59,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 54 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:30:59,931 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-03 23:30:59,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-03 23:30:59,932 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-03 23:30:59,932 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-03 23:30:59,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-03 23:30:59,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:30:59,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:30:59,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:31:00,137 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 [2023-08-03 23:31:00,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:31:00,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:31:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash 955173841, now seen corresponding path program 1 times [2023-08-03 23:31:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:31:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888126533] [2023-08-03 23:31:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:31:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:31:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:31:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888126533] [2023-08-03 23:31:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888126533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:31:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412645967] [2023-08-03 23:31:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:31:00,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:31:00,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:31:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:00,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:31:00,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:31:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:31:00,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:31:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412645967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:31:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:31:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:31:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751908326] [2023-08-03 23:31:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:31:00,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:31:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:31:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:31:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:31:00,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-03 23:31:00,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-03 23:31:00,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:31:00,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-03 23:31:00,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:31:06,319 INFO L124 PetriNetUnfolderBase]: 59107/79453 cut-off events. [2023-08-03 23:31:06,319 INFO L125 PetriNetUnfolderBase]: For 3211/3211 co-relation queries the response was YES. [2023-08-03 23:31:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159381 conditions, 79453 events. 59107/79453 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 2770. Compared 514776 event pairs, 17122 based on Foata normal form. 144/74548 useless extension candidates. Maximal degree in co-relation 56598. Up to 74007 conditions per place. [2023-08-03 23:31:07,041 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 55 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-03 23:31:07,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 313 flow [2023-08-03 23:31:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:31:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:31:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 684 transitions. [2023-08-03 23:31:07,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2023-08-03 23:31:07,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 684 transitions. [2023-08-03 23:31:07,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 684 transitions. [2023-08-03 23:31:07,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:31:07,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 684 transitions. [2023-08-03 23:31:07,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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) [2023-08-03 23:31:07,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-03 23:31:07,048 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-03 23:31:07,048 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 684 transitions. [2023-08-03 23:31:07,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 313 flow [2023-08-03 23:31:07,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:31:07,052 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-03 23:31:07,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-03 23:31:07,053 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-03 23:31:07,053 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-03 23:31:07,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-03 23:31:07,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:31:07,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:31:07,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:31:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:07,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:31:07,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:31:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -901264592, now seen corresponding path program 1 times [2023-08-03 23:31:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:31:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455835912] [2023-08-03 23:31:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:31:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:31:07,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:31:07,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455835912] [2023-08-03 23:31:07,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455835912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:31:07,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030712972] [2023-08-03 23:31:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:07,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:07,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:31:07,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:31:07,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:31:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:07,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:31:07,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:31:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:31:07,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:31:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:31:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030712972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:31:07,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:31:07,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:31:07,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065750348] [2023-08-03 23:31:07,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:31:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:31:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:31:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:31:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:31:07,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-03 23:31:07,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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) [2023-08-03 23:31:07,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:31:07,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-03 23:31:07,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:31:12,614 INFO L124 PetriNetUnfolderBase]: 49312/65698 cut-off events. [2023-08-03 23:31:12,615 INFO L125 PetriNetUnfolderBase]: For 3493/3493 co-relation queries the response was YES. [2023-08-03 23:31:12,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132345 conditions, 65698 events. 49312/65698 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 2509. Compared 409589 event pairs, 30214 based on Foata normal form. 36/61693 useless extension candidates. Maximal degree in co-relation 46907. Up to 61204 conditions per place. [2023-08-03 23:31:13,041 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 51 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:31:13,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 299 flow [2023-08-03 23:31:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:31:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:31:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2023-08-03 23:31:13,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2023-08-03 23:31:13,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2023-08-03 23:31:13,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2023-08-03 23:31:13,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:31:13,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2023-08-03 23:31:13,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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) [2023-08-03 23:31:13,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:31:13,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:31:13,047 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 554 transitions. [2023-08-03 23:31:13,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 299 flow [2023-08-03 23:31:13,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:31:13,052 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-03 23:31:13,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-03 23:31:13,053 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-03 23:31:13,053 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-03 23:31:13,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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) [2023-08-03 23:31:13,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:31:13,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:31:13,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 23:31:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:13,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:31:13,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:31:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1263251515, now seen corresponding path program 1 times [2023-08-03 23:31:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:31:13,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129891037] [2023-08-03 23:31:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:31:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:31:13,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:31:13,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129891037] [2023-08-03 23:31:13,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129891037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:31:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264271255] [2023-08-03 23:31:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:13,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:31:13,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:31:13,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:31:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:13,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:31:13,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:31:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:31:13,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:31:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264271255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:31:13,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:31:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:31:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301052604] [2023-08-03 23:31:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:31:13,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:31:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:31:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:31:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:31:13,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-03 23:31:13,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 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) [2023-08-03 23:31:13,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:31:13,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-03 23:31:13,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:31:16,129 INFO L124 PetriNetUnfolderBase]: 25984/35647 cut-off events. [2023-08-03 23:31:16,130 INFO L125 PetriNetUnfolderBase]: For 2458/2458 co-relation queries the response was YES. [2023-08-03 23:31:16,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73098 conditions, 35647 events. 25984/35647 cut-off events. For 2458/2458 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 217375 event pairs, 952 based on Foata normal form. 5184/38518 useless extension candidates. Maximal degree in co-relation 26006. Up to 28224 conditions per place. [2023-08-03 23:31:16,254 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 0 selfloop transitions, 0 changer transitions 70/70 dead transitions. [2023-08-03 23:31:16,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 322 flow [2023-08-03 23:31:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:31:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:31:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-08-03 23:31:16,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2023-08-03 23:31:16,256 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-08-03 23:31:16,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-08-03 23:31:16,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:31:16,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-08-03 23:31:16,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-03 23:31:16,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:31:16,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-03 23:31:16,260 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 564 transitions. [2023-08-03 23:31:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 322 flow [2023-08-03 23:31:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 315 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:31:16,419 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-03 23:31:16,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-03 23:31:16,420 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-03 23:31:16,420 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-03 23:31:16,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 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) [2023-08-03 23:31:16,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:31:16,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:31:16,421 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:31:16,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:31:16,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:31:16,622 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:31:16,623 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:31:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:31:16,730 INFO L124 PetriNetUnfolderBase]: 93/1409 cut-off events. [2023-08-03 23:31:16,731 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:31:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 1409 events. 93/1409 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9823 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-03 23:31:16,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:31:16,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 152 transitions, 332 flow [2023-08-03 23:31:16,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:31:16,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 152 transitions, 332 flow [2023-08-03 23:31:16,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 152 transitions, 332 flow [2023-08-03 23:31:16,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 152 transitions, 332 flow [2023-08-03 23:31:16,817 INFO L124 PetriNetUnfolderBase]: 93/1405 cut-off events. [2023-08-03 23:31:16,817 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:31:16,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 1405 events. 93/1405 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9761 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 1005. Up to 54 conditions per place. [2023-08-03 23:31:16,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 6220 [2023-08-03 23:31:19,804 INFO L134 LiptonReduction]: Checked pairs total: 17736 [2023-08-03 23:31:19,805 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-03 23:31:19,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:31:19,807 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;@653ba1bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:31:19,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:31:19,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:31:19,922 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-08-03 23:31:19,922 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 23:31:19,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:31:19,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:31:19,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:31:19,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:31:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1956611115, now seen corresponding path program 1 times [2023-08-03 23:31:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:31:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580378900] [2023-08-03 23:31:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:31:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:31:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:31:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:31:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:31:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580378900] [2023-08-03 23:31:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580378900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:31:19,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:31:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:31:19,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263152563] [2023-08-03 23:31:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:31:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:31:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:31:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:31:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:31:19,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 270 [2023-08-03 23:31:19,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-03 23:31:19,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:31:19,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 270 [2023-08-03 23:31:19,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:31:59,228 INFO L124 PetriNetUnfolderBase]: 378842/494895 cut-off events. [2023-08-03 23:31:59,228 INFO L125 PetriNetUnfolderBase]: For 5277/5277 co-relation queries the response was YES. [2023-08-03 23:32:00,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978098 conditions, 494895 events. 378842/494895 cut-off events. For 5277/5277 co-relation queries the response was YES. Maximal size of possible extension queue 13234. Compared 3461138 event pairs, 313476 based on Foata normal form. 10836/437967 useless extension candidates. Maximal degree in co-relation 282449. Up to 476892 conditions per place. [2023-08-03 23:32:02,252 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 43 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 23:32:02,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 228 flow [2023-08-03 23:32:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:32:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:32:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-03 23:32:02,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2023-08-03 23:32:02,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-03 23:32:02,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-03 23:32:02,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:32:02,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-03 23:32:02,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-03 23:32:02,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-03 23:32:02,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-03 23:32:02,255 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 132 flow. Second operand 3 states and 425 transitions. [2023-08-03 23:32:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 228 flow [2023-08-03 23:32:02,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 226 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:32:02,259 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 140 flow [2023-08-03 23:32:02,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-08-03 23:32:02,260 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-03 23:32:02,260 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 140 flow [2023-08-03 23:32:02,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-03 23:32:02,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:32:02,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:32:02,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:32:02,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:32:02,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:32:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1233990780, now seen corresponding path program 1 times [2023-08-03 23:32:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:32:02,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979977972] [2023-08-03 23:32:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:32:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:32:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:32:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:32:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:32:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979977972] [2023-08-03 23:32:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979977972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:32:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494504685] [2023-08-03 23:32:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:32:02,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:32:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:32:02,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:32:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:32:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:32:02,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:32:02,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:32:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:32:02,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:32:02,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494504685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:32:02,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:32:02,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:32:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81677969] [2023-08-03 23:32:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:32:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:32:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:32:02,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:32:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:32:02,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 270 [2023-08-03 23:32:02,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-03 23:32:02,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:32:02,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 270 [2023-08-03 23:32:02,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:32:41,167 INFO L124 PetriNetUnfolderBase]: 366838/477832 cut-off events. [2023-08-03 23:32:41,167 INFO L125 PetriNetUnfolderBase]: For 4347/4347 co-relation queries the response was YES. [2023-08-03 23:32:42,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944309 conditions, 477832 events. 366838/477832 cut-off events. For 4347/4347 co-relation queries the response was YES. Maximal size of possible extension queue 13088. Compared 3335337 event pairs, 296770 based on Foata normal form. 0/417244 useless extension candidates. Maximal degree in co-relation 944272. Up to 460105 conditions per place. [2023-08-03 23:32:44,223 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 49 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-03 23:32:44,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 260 flow [2023-08-03 23:32:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:32:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:32:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-03 23:32:44,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2023-08-03 23:32:44,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-03 23:32:44,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-03 23:32:44,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:32:44,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-03 23:32:44,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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) [2023-08-03 23:32:44,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-03 23:32:44,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-03 23:32:44,227 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 140 flow. Second operand 3 states and 429 transitions. [2023-08-03 23:32:44,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 260 flow [2023-08-03 23:32:44,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:32:44,230 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 150 flow [2023-08-03 23:32:44,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-08-03 23:32:44,230 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2023-08-03 23:32:44,231 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 150 flow [2023-08-03 23:32:44,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-03 23:32:44,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:32:44,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:32:44,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 23:32:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:32:44,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:32:44,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:32:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1926939804, now seen corresponding path program 1 times [2023-08-03 23:32:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:32:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079703725] [2023-08-03 23:32:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:32:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:32:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:32:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:32:44,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:32:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079703725] [2023-08-03 23:32:44,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079703725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:32:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304128940] [2023-08-03 23:32:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:32:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:32:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:32:44,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:32:44,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 23:32:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:32:44,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:32:44,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:32:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:32:44,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:32:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:32:44,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304128940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:32:44,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:32:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:32:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739601144] [2023-08-03 23:32:44,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:32:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:32:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:32:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:32:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:32:44,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 270 [2023-08-03 23:32:44,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 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) [2023-08-03 23:32:44,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:32:44,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 270 [2023-08-03 23:32:44,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:33:13,133 INFO L124 PetriNetUnfolderBase]: 286810/369884 cut-off events. [2023-08-03 23:33:13,134 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2023-08-03 23:33:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731845 conditions, 369884 events. 286810/369884 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 10476. Compared 2446097 event pairs, 193398 based on Foata normal form. 3/324698 useless extension candidates. Maximal degree in co-relation 259498. Up to 356836 conditions per place. [2023-08-03 23:33:15,647 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 47 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-03 23:33:15,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 268 flow [2023-08-03 23:33:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:33:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:33:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 551 transitions. [2023-08-03 23:33:15,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101851851851852 [2023-08-03 23:33:15,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 551 transitions. [2023-08-03 23:33:15,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 551 transitions. [2023-08-03 23:33:15,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:33:15,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 551 transitions. [2023-08-03 23:33:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 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) [2023-08-03 23:33:15,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-03 23:33:15,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-03 23:33:15,651 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 150 flow. Second operand 4 states and 551 transitions. [2023-08-03 23:33:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 268 flow [2023-08-03 23:33:15,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 61 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:33:15,653 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 162 flow [2023-08-03 23:33:15,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2023-08-03 23:33:15,654 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 9 predicate places. [2023-08-03 23:33:15,654 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 162 flow [2023-08-03 23:33:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 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) [2023-08-03 23:33:15,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:33:15,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:33:15,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 23:33:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 23:33:15,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:33:15,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:33:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash 141637964, now seen corresponding path program 1 times [2023-08-03 23:33:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:33:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143900406] [2023-08-03 23:33:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:33:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:33:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:33:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:33:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:33:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143900406] [2023-08-03 23:33:15,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143900406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:33:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591372399] [2023-08-03 23:33:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:33:15,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:33:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:33:15,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:33:15,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 23:33:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:33:15,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:33:15,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:33:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:33:15,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:33:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:33:16,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591372399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:33:16,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:33:16,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:33:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420942839] [2023-08-03 23:33:16,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:33:16,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:33:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:33:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:33:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:33:16,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 270 [2023-08-03 23:33:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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) [2023-08-03 23:33:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:33:16,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 270 [2023-08-03 23:33:16,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand