/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_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:36:13,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:36:13,325 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:36:13,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:36:13,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:36:13,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:36:13,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:36:13,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:36:13,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:36:13,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:36:13,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:36:13,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:36:13,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:36:13,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:36:13,356 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:36:13,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:36:13,356 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:36:13,356 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:36:13,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:36:13,357 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:36:13,358 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:36:13,358 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:36:13,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:36:13,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:36:13,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:36:13,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:36:13,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:36:13,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:36:13,359 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:36:13,360 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:36:13,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:36:13,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:36:13,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:36:13,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:36:13,560 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:36:13,560 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:36:13,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:36:14,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:36:14,587 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:36:14,587 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:36:14,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4572dd0/7febfbccb8854381bcc804d74f8123e0/FLAGae186420c [2023-08-04 00:36:14,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4572dd0/7febfbccb8854381bcc804d74f8123e0 [2023-08-04 00:36:14,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:36:14,618 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:36:14,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:36:14,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:36:14,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:36:14,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:14,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e479d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14, skipping insertion in model container [2023-08-04 00:36:14,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:14,667 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:36:14,763 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_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 00:36:14,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:36:14,864 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:36:14,877 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_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 00:36:14,890 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:36:14,891 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:36:14,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:36:14,944 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:36:14,944 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:36:14,949 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:36:14,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14 WrapperNode [2023-08-04 00:36:14,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:36:14,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:36:14,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:36:14,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:36:14,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:14,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:14,995 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2023-08-04 00:36:14,995 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:36:14,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:36:14,996 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:36:14,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:36:15,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,018 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,022 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,026 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:36:15,027 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:36:15,027 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:36:15,027 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:36:15,028 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (1/1) ... [2023-08-04 00:36:15,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:36:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:36:15,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:36:15,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:36:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:36:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:36:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:36:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:36:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:36:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:36:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:36:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:36:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:36:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:36:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:36:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 00:36:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 00:36:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:36:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:36:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:36:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:36:15,078 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:36:15,168 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:36:15,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:36:15,295 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:36:15,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:36:15,300 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 00:36:15,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:36:15 BoogieIcfgContainer [2023-08-04 00:36:15,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:36:15,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:36:15,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:36:15,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:36:15,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:36:14" (1/3) ... [2023-08-04 00:36:15,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721e92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:36:15, skipping insertion in model container [2023-08-04 00:36:15,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:36:14" (2/3) ... [2023-08-04 00:36:15,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721e92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:36:15, skipping insertion in model container [2023-08-04 00:36:15,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:36:15" (3/3) ... [2023-08-04 00:36:15,307 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:36:15,312 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:36:15,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:36:15,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:36:15,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:36:15,356 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:36:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 00:36:15,535 INFO L124 PetriNetUnfolderBase]: 62/859 cut-off events. [2023-08-04 00:36:15,536 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:36:15,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 859 events. 62/859 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5307 event pairs, 0 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 512. Up to 32 conditions per place. [2023-08-04 00:36:15,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 00:36:15,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 96 transitions, 212 flow [2023-08-04 00:36:15,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:36:15,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 96 transitions, 212 flow [2023-08-04 00:36:15,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 96 transitions, 212 flow [2023-08-04 00:36:15,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 96 transitions, 212 flow [2023-08-04 00:36:15,593 INFO L124 PetriNetUnfolderBase]: 14/379 cut-off events. [2023-08-04 00:36:15,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:36:15,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 379 events. 14/379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1726 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-04 00:36:15,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 1822 [2023-08-04 00:36:17,110 INFO L134 LiptonReduction]: Checked pairs total: 2758 [2023-08-04 00:36:17,111 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-04 00:36:17,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:36:17,123 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;@658c1fc1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:36:17,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:36:17,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:36:17,126 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 00:36:17,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:36:17,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:17,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:36:17,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:36:17,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -364134438, now seen corresponding path program 1 times [2023-08-04 00:36:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166362258] [2023-08-04 00:36:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:36:17,223 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:36:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:36:17,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:36:17,258 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:36:17,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 00:36:17,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 00:36:17,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 00:36:17,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 00:36:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:36:17,260 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:36:17,264 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:36:17,264 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:36:17,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:36:17,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:36:17,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 00:36:17,616 INFO L124 PetriNetUnfolderBase]: 282/4024 cut-off events. [2023-08-04 00:36:17,617 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:36:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 4024 events. 282/4024 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38240 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 2927. Up to 162 conditions per place. [2023-08-04 00:36:17,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 00:36:17,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 122 transitions, 292 flow [2023-08-04 00:36:17,633 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:36:17,634 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 122 transitions, 292 flow [2023-08-04 00:36:17,634 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 122 transitions, 292 flow [2023-08-04 00:36:17,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 122 transitions, 292 flow [2023-08-04 00:36:17,732 INFO L124 PetriNetUnfolderBase]: 39/1594 cut-off events. [2023-08-04 00:36:17,732 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:36:17,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 1594 events. 39/1594 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12219 event pairs, 0 based on Foata normal form. 0/1516 useless extension candidates. Maximal degree in co-relation 1307. Up to 81 conditions per place. [2023-08-04 00:36:17,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 4792 [2023-08-04 00:36:19,297 INFO L134 LiptonReduction]: Checked pairs total: 9325 [2023-08-04 00:36:19,297 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-04 00:36:19,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:36:19,300 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;@658c1fc1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:36:19,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:36:19,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:36:19,306 INFO L124 PetriNetUnfolderBase]: 0/86 cut-off events. [2023-08-04 00:36:19,306 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:36:19,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:19,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:36:19,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:36:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1238504279, now seen corresponding path program 1 times [2023-08-04 00:36:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136831278] [2023-08-04 00:36:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:36:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136831278] [2023-08-04 00:36:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136831278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:36:19,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:36:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:36:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444800999] [2023-08-04 00:36:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:36:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:36:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:36:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:36:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:36:19,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 233 [2023-08-04 00:36:19,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:19,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:36:19,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 233 [2023-08-04 00:36:19,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:36:36,831 INFO L124 PetriNetUnfolderBase]: 228488/298554 cut-off events. [2023-08-04 00:36:36,831 INFO L125 PetriNetUnfolderBase]: For 22728/22728 co-relation queries the response was YES. [2023-08-04 00:36:37,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612451 conditions, 298554 events. 228488/298554 cut-off events. For 22728/22728 co-relation queries the response was YES. Maximal size of possible extension queue 7520. Compared 1996950 event pairs, 190410 based on Foata normal form. 0/291039 useless extension candidates. Maximal degree in co-relation 194373. Up to 285606 conditions per place. [2023-08-04 00:36:38,966 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 00:36:38,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 228 flow [2023-08-04 00:36:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:36:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:36:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-04 00:36:38,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280400572246065 [2023-08-04 00:36:38,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-04 00:36:38,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-04 00:36:38,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:36:38,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-04 00:36:38,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:38,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:38,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:38,988 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 142 flow. Second operand 3 states and 439 transitions. [2023-08-04 00:36:38,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 228 flow [2023-08-04 00:36:39,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 51 transitions, 220 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-04 00:36:39,017 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 146 flow [2023-08-04 00:36:39,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2023-08-04 00:36:39,022 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-04 00:36:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 146 flow [2023-08-04 00:36:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:36:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:36:39,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:36:39,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2088733313, now seen corresponding path program 1 times [2023-08-04 00:36:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861166078] [2023-08-04 00:36:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:36:39,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:39,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861166078] [2023-08-04 00:36:39,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861166078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:36:39,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:36:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:36:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479695611] [2023-08-04 00:36:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:36:39,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:36:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:36:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:36:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:36:39,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:36:39,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:39,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:36:39,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:36:39,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:36:55,931 INFO L124 PetriNetUnfolderBase]: 228476/298497 cut-off events. [2023-08-04 00:36:55,931 INFO L125 PetriNetUnfolderBase]: For 20643/20643 co-relation queries the response was YES. [2023-08-04 00:36:56,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610345 conditions, 298497 events. 228476/298497 cut-off events. For 20643/20643 co-relation queries the response was YES. Maximal size of possible extension queue 7520. Compared 1996591 event pairs, 161856 based on Foata normal form. 9/291030 useless extension candidates. Maximal degree in co-relation 216127. Up to 285559 conditions per place. [2023-08-04 00:36:58,007 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 40 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-04 00:36:58,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 248 flow [2023-08-04 00:36:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:36:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:36:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2023-08-04 00:36:58,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6051502145922747 [2023-08-04 00:36:58,010 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2023-08-04 00:36:58,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2023-08-04 00:36:58,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:36:58,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2023-08-04 00:36:58,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:58,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:58,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:58,015 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 146 flow. Second operand 5 states and 705 transitions. [2023-08-04 00:36:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 248 flow [2023-08-04 00:36:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:36:58,020 INFO L231 Difference]: Finished difference. Result has 70 places, 48 transitions, 160 flow [2023-08-04 00:36:58,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=70, PETRI_TRANSITIONS=48} [2023-08-04 00:36:58,021 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-08-04 00:36:58,021 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 48 transitions, 160 flow [2023-08-04 00:36:58,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:58,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:58,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:36:58,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:36:58,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:36:58,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1849889060, now seen corresponding path program 1 times [2023-08-04 00:36:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:58,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833602556] [2023-08-04 00:36:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:58,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:36:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:58,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833602556] [2023-08-04 00:36:58,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833602556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:36:58,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243154164] [2023-08-04 00:36:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:58,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:36:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:36:58,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:36:58,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:36:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:58,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:36:58,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:36:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:36:58,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:36:58,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243154164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:36:58,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:36:58,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:36:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056288127] [2023-08-04 00:36:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:36:58,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:36:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:36:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:36:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:36:58,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 233 [2023-08-04 00:36:58,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 48 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:58,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:36:58,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 233 [2023-08-04 00:36:58,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:37:13,407 INFO L124 PetriNetUnfolderBase]: 215666/286232 cut-off events. [2023-08-04 00:37:13,408 INFO L125 PetriNetUnfolderBase]: For 18358/18358 co-relation queries the response was YES. [2023-08-04 00:37:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580545 conditions, 286232 events. 215666/286232 cut-off events. For 18358/18358 co-relation queries the response was YES. Maximal size of possible extension queue 7629. Compared 1982161 event pairs, 180484 based on Foata normal form. 0/280352 useless extension candidates. Maximal degree in co-relation 184820. Up to 268294 conditions per place. [2023-08-04 00:37:15,414 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 42 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 00:37:15,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 56 transitions, 266 flow [2023-08-04 00:37:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:37:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:37:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 00:37:15,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337625178826896 [2023-08-04 00:37:15,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 00:37:15,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 00:37:15,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:37:15,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 00:37:15,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:15,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:15,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:15,420 INFO L175 Difference]: Start difference. First operand has 70 places, 48 transitions, 160 flow. Second operand 3 states and 443 transitions. [2023-08-04 00:37:15,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 56 transitions, 266 flow [2023-08-04 00:37:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 56 transitions, 259 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:37:15,422 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 168 flow [2023-08-04 00:37:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-04 00:37:15,422 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 7 predicate places. [2023-08-04 00:37:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 168 flow [2023-08-04 00:37:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:15,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:15,423 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:37:15,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:37:15,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:15,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:15,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1250811228, now seen corresponding path program 1 times [2023-08-04 00:37:15,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:15,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588847495] [2023-08-04 00:37:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:37:15,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:37:15,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588847495] [2023-08-04 00:37:15,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588847495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:37:15,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710378076] [2023-08-04 00:37:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:15,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:15,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:37:15,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:37:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:15,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:37:15,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:37:15,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:37:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:37:15,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710378076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:37:15,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:37:15,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 00:37:15,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584148331] [2023-08-04 00:37:15,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:37:15,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:37:15,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:15,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:37:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:37:15,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:37:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:15,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:15,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:37:15,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:37:28,155 INFO L124 PetriNetUnfolderBase]: 168346/221519 cut-off events. [2023-08-04 00:37:28,155 INFO L125 PetriNetUnfolderBase]: For 13788/13788 co-relation queries the response was YES. [2023-08-04 00:37:28,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449114 conditions, 221519 events. 168346/221519 cut-off events. For 13788/13788 co-relation queries the response was YES. Maximal size of possible extension queue 6049. Compared 1467452 event pairs, 115596 based on Foata normal form. 3/217220 useless extension candidates. Maximal degree in co-relation 158473. Up to 207892 conditions per place. [2023-08-04 00:37:29,785 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 41 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 00:37:29,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 55 transitions, 263 flow [2023-08-04 00:37:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:37:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:37:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-04 00:37:29,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137339055793991 [2023-08-04 00:37:29,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-04 00:37:29,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-04 00:37:29,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:37:29,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-04 00:37:29,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:29,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:29,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:29,790 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 168 flow. Second operand 4 states and 572 transitions. [2023-08-04 00:37:29,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 55 transitions, 263 flow [2023-08-04 00:37:29,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 55 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:37:29,794 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 163 flow [2023-08-04 00:37:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2023-08-04 00:37:29,795 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 9 predicate places. [2023-08-04 00:37:29,795 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 163 flow [2023-08-04 00:37:29,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:29,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:29,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:37:29,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:37:29,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:30,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:30,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1709326670, now seen corresponding path program 1 times [2023-08-04 00:37:30,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:30,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779426429] [2023-08-04 00:37:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:37:30,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:37:30,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779426429] [2023-08-04 00:37:30,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779426429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:37:30,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332122404] [2023-08-04 00:37:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:30,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:37:30,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:37:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:30,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:37:30,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:37:30,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:37:30,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332122404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:37:30,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:37:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:37:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143898981] [2023-08-04 00:37:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:37:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:37:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:30,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:37:30,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:37:30,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:37:30,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:30,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:30,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:37:30,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:37:41,794 INFO L124 PetriNetUnfolderBase]: 168130/221281 cut-off events. [2023-08-04 00:37:41,794 INFO L125 PetriNetUnfolderBase]: For 13426/13426 co-relation queries the response was YES. [2023-08-04 00:37:42,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448538 conditions, 221281 events. 168130/221281 cut-off events. For 13426/13426 co-relation queries the response was YES. Maximal size of possible extension queue 6028. Compared 1467053 event pairs, 69574 based on Foata normal form. 81/217033 useless extension candidates. Maximal degree in co-relation 158261. Up to 207063 conditions per place. [2023-08-04 00:37:43,270 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 53 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 00:37:43,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 315 flow [2023-08-04 00:37:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:37:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:37:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-04 00:37:43,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615450643776824 [2023-08-04 00:37:43,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-04 00:37:43,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-04 00:37:43,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:37:43,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-04 00:37:43,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:43,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:43,276 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:43,276 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 163 flow. Second operand 5 states and 717 transitions. [2023-08-04 00:37:43,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 315 flow [2023-08-04 00:37:43,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:37:43,278 INFO L231 Difference]: Finished difference. Result has 74 places, 48 transitions, 173 flow [2023-08-04 00:37:43,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=74, PETRI_TRANSITIONS=48} [2023-08-04 00:37:43,279 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 10 predicate places. [2023-08-04 00:37:43,279 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 48 transitions, 173 flow [2023-08-04 00:37:43,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:43,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:43,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:37:43,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:37:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:43,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:43,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1839306574, now seen corresponding path program 1 times [2023-08-04 00:37:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893609249] [2023-08-04 00:37:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:37:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:37:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893609249] [2023-08-04 00:37:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893609249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:37:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931518493] [2023-08-04 00:37:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:43,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:43,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:43,543 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) [2023-08-04 00:37:43,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:37:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:43,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:37:43,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:37:43,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:37:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931518493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:37:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:37:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 00:37:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37071399] [2023-08-04 00:37:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:37:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:37:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:37:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:37:43,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 233 [2023-08-04 00:37:43,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 48 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:43,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:43,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 233 [2023-08-04 00:37:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:37:55,031 INFO L124 PetriNetUnfolderBase]: 159220/207295 cut-off events. [2023-08-04 00:37:55,032 INFO L125 PetriNetUnfolderBase]: For 12403/12403 co-relation queries the response was YES. [2023-08-04 00:37:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423731 conditions, 207295 events. 159220/207295 cut-off events. For 12403/12403 co-relation queries the response was YES. Maximal size of possible extension queue 5907. Compared 1338225 event pairs, 133894 based on Foata normal form. 0/204262 useless extension candidates. Maximal degree in co-relation 149393. Up to 194125 conditions per place. [2023-08-04 00:37:56,659 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 00:37:56,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 60 transitions, 297 flow [2023-08-04 00:37:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:37:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:37:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-04 00:37:56,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394849785407726 [2023-08-04 00:37:56,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-04 00:37:56,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-04 00:37:56,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:37:56,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-04 00:37:56,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:56,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:56,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:56,663 INFO L175 Difference]: Start difference. First operand has 74 places, 48 transitions, 173 flow. Second operand 3 states and 447 transitions. [2023-08-04 00:37:56,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 60 transitions, 297 flow [2023-08-04 00:37:56,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 60 transitions, 290 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:37:56,665 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 181 flow [2023-08-04 00:37:56,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2023-08-04 00:37:56,666 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 11 predicate places. [2023-08-04 00:37:56,666 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 181 flow [2023-08-04 00:37:56,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:56,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:56,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:37:56,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:37:56,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:56,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:56,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1197440805, now seen corresponding path program 1 times [2023-08-04 00:37:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430782930] [2023-08-04 00:37:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:37:56,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:37:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430782930] [2023-08-04 00:37:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430782930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:37:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846406026] [2023-08-04 00:37:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:56,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:56,929 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) [2023-08-04 00:37:56,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:37:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:57,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:37:57,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:37:57,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:37:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:37:57,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846406026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:37:57,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:37:57,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:37:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614694354] [2023-08-04 00:37:57,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:37:57,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:37:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:37:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:37:57,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:37:57,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:57,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:57,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:37:57,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:38:06,064 INFO L124 PetriNetUnfolderBase]: 124120/160423 cut-off events. [2023-08-04 00:38:06,064 INFO L125 PetriNetUnfolderBase]: For 11176/11176 co-relation queries the response was YES. [2023-08-04 00:38:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329817 conditions, 160423 events. 124120/160423 cut-off events. For 11176/11176 co-relation queries the response was YES. Maximal size of possible extension queue 4998. Compared 984678 event pairs, 87178 based on Foata normal form. 27/159145 useless extension candidates. Maximal degree in co-relation 116060. Up to 151279 conditions per place. [2023-08-04 00:38:07,216 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 50 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-04 00:38:07,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 63 transitions, 310 flow [2023-08-04 00:38:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:38:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:38:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2023-08-04 00:38:07,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6223175965665236 [2023-08-04 00:38:07,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2023-08-04 00:38:07,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2023-08-04 00:38:07,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:38:07,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2023-08-04 00:38:07,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:07,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:07,221 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:07,221 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 181 flow. Second operand 4 states and 580 transitions. [2023-08-04 00:38:07,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 63 transitions, 310 flow [2023-08-04 00:38:07,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 63 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:38:07,225 INFO L231 Difference]: Finished difference. Result has 77 places, 48 transitions, 176 flow [2023-08-04 00:38:07,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=48} [2023-08-04 00:38:07,226 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2023-08-04 00:38:07,226 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 48 transitions, 176 flow [2023-08-04 00:38:07,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:07,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:38:07,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:38:07,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:38:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:38:07,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:38:07,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:38:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 776666170, now seen corresponding path program 1 times [2023-08-04 00:38:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:38:07,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141343310] [2023-08-04 00:38:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:38:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:38:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:38:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141343310] [2023-08-04 00:38:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141343310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:38:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713118106] [2023-08-04 00:38:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:07,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:38:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:38:07,481 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) [2023-08-04 00:38:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:38:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:07,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:38:07,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:38:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:38:07,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:38:07,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713118106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:38:07,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:38:07,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:38:07,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862681571] [2023-08-04 00:38:07,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:38:07,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:38:07,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:38:07,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:38:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:38:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:38:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 48 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:38:07,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:38:07,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:38:16,271 INFO L124 PetriNetUnfolderBase]: 121204/155644 cut-off events. [2023-08-04 00:38:16,271 INFO L125 PetriNetUnfolderBase]: For 9163/9163 co-relation queries the response was YES. [2023-08-04 00:38:16,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321024 conditions, 155644 events. 121204/155644 cut-off events. For 9163/9163 co-relation queries the response was YES. Maximal size of possible extension queue 4959. Compared 937683 event pairs, 20008 based on Foata normal form. 729/155311 useless extension candidates. Maximal degree in co-relation 112967. Up to 140535 conditions per place. [2023-08-04 00:38:17,419 INFO L140 encePairwiseOnDemand]: 229/233 looper letters, 66 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-04 00:38:17,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 378 flow [2023-08-04 00:38:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:38:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:38:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-04 00:38:17,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6257510729613734 [2023-08-04 00:38:17,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-04 00:38:17,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-04 00:38:17,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:38:17,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-04 00:38:17,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:17,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:17,437 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:17,437 INFO L175 Difference]: Start difference. First operand has 77 places, 48 transitions, 176 flow. Second operand 5 states and 729 transitions. [2023-08-04 00:38:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 378 flow [2023-08-04 00:38:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 371 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:38:17,476 INFO L231 Difference]: Finished difference. Result has 78 places, 48 transitions, 186 flow [2023-08-04 00:38:17,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=78, PETRI_TRANSITIONS=48} [2023-08-04 00:38:17,479 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 14 predicate places. [2023-08-04 00:38:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 48 transitions, 186 flow [2023-08-04 00:38:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:17,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:38:17,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:38:17,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 00:38:17,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:38:17,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:38:17,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:38:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1492805423, now seen corresponding path program 1 times [2023-08-04 00:38:17,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:38:17,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271843824] [2023-08-04 00:38:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:38:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 00:38:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:38:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271843824] [2023-08-04 00:38:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271843824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:38:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997174677] [2023-08-04 00:38:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:17,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:38:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:38:17,789 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) [2023-08-04 00:38:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:38:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:17,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:38:17,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:38:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 00:38:17,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:38:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 00:38:17,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997174677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:38:17,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:38:17,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:38:17,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354935641] [2023-08-04 00:38:17,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:38:17,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:38:17,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:38:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:38:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:38:17,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 233 [2023-08-04 00:38:17,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 48 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:38:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 233 [2023-08-04 00:38:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:38:25,229 INFO L124 PetriNetUnfolderBase]: 96094/122758 cut-off events. [2023-08-04 00:38:25,230 INFO L125 PetriNetUnfolderBase]: For 11995/11995 co-relation queries the response was YES. [2023-08-04 00:38:25,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256027 conditions, 122758 events. 96094/122758 cut-off events. For 11995/11995 co-relation queries the response was YES. Maximal size of possible extension queue 4500. Compared 715617 event pairs, 65692 based on Foata normal form. 243/122182 useless extension candidates. Maximal degree in co-relation 89951. Up to 110209 conditions per place. [2023-08-04 00:38:26,105 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 58 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-04 00:38:26,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 70 transitions, 348 flow [2023-08-04 00:38:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:38:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:38:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-04 00:38:26,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.630901287553648 [2023-08-04 00:38:26,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-04 00:38:26,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-04 00:38:26,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:38:26,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-04 00:38:26,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:26,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:26,110 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:26,110 INFO L175 Difference]: Start difference. First operand has 78 places, 48 transitions, 186 flow. Second operand 4 states and 588 transitions. [2023-08-04 00:38:26,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 70 transitions, 348 flow [2023-08-04 00:38:26,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 70 transitions, 343 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:38:26,122 INFO L231 Difference]: Finished difference. Result has 79 places, 47 transitions, 179 flow [2023-08-04 00:38:26,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=76, 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=179, PETRI_PLACES=79, PETRI_TRANSITIONS=47} [2023-08-04 00:38:26,124 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 15 predicate places. [2023-08-04 00:38:26,124 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 47 transitions, 179 flow [2023-08-04 00:38:26,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:26,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:38:26,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:38:26,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 00:38:26,329 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 [2023-08-04 00:38:26,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:38:26,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:38:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1010070094, now seen corresponding path program 1 times [2023-08-04 00:38:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:38:26,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767768089] [2023-08-04 00:38:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:38:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:38:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:38:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767768089] [2023-08-04 00:38:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767768089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:38:26,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:38:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:38:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290693291] [2023-08-04 00:38:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:38:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:38:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:38:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:38:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:38:26,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 233 [2023-08-04 00:38:26,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 47 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:26,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:38:26,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 233 [2023-08-04 00:38:26,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:38:30,754 INFO L124 PetriNetUnfolderBase]: 61102/79423 cut-off events. [2023-08-04 00:38:30,754 INFO L125 PetriNetUnfolderBase]: For 10861/10861 co-relation queries the response was YES. [2023-08-04 00:38:31,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169195 conditions, 79423 events. 61102/79423 cut-off events. For 10861/10861 co-relation queries the response was YES. Maximal size of possible extension queue 2917. Compared 453983 event pairs, 8614 based on Foata normal form. 6561/85165 useless extension candidates. Maximal degree in co-relation 86072. Up to 49572 conditions per place. [2023-08-04 00:38:31,077 INFO L140 encePairwiseOnDemand]: 231/233 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 00:38:31,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 355 flow [2023-08-04 00:38:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:38:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:38:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 594 transitions. [2023-08-04 00:38:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373390557939914 [2023-08-04 00:38:31,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 594 transitions. [2023-08-04 00:38:31,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 594 transitions. [2023-08-04 00:38:31,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:38:31,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 594 transitions. [2023-08-04 00:38:31,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:31,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:31,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:31,081 INFO L175 Difference]: Start difference. First operand has 79 places, 47 transitions, 179 flow. Second operand 4 states and 594 transitions. [2023-08-04 00:38:31,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 355 flow [2023-08-04 00:38:32,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 348 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:38:32,075 INFO L231 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2023-08-04 00:38:32,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2023-08-04 00:38:32,075 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2023-08-04 00:38:32,075 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2023-08-04 00:38:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:32,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 00:38:32,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 00:38:32,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 00:38:32,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 00:38:32,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 00:38:32,076 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:38:32,077 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 00:38:32,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 00:38:32,271 INFO L124 PetriNetUnfolderBase]: 282/4024 cut-off events. [2023-08-04 00:38:32,272 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:38:32,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 4024 events. 282/4024 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38240 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 2927. Up to 162 conditions per place. [2023-08-04 00:38:32,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 00:38:32,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 134 transitions, 300 flow [2023-08-04 00:38:32,287 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:38:32,288 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 134 transitions, 300 flow [2023-08-04 00:38:32,288 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 134 transitions, 300 flow [2023-08-04 00:38:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 300 flow [2023-08-04 00:38:32,541 INFO L124 PetriNetUnfolderBase]: 201/2850 cut-off events. [2023-08-04 00:38:32,542 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 00:38:32,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 2850 events. 201/2850 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 24878 event pairs, 0 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 2132. Up to 162 conditions per place. [2023-08-04 00:38:32,570 INFO L119 LiptonReduction]: Number of co-enabled transitions 5976 [2023-08-04 00:38:34,139 INFO L134 LiptonReduction]: Checked pairs total: 10671 [2023-08-04 00:38:34,139 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 00:38:34,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:38:34,141 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;@658c1fc1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:38:34,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:38:34,143 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:38:34,143 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 00:38:34,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:38:34,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:38:34,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:38:34,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:38:34,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:38:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash 743836542, now seen corresponding path program 1 times [2023-08-04 00:38:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:38:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468454369] [2023-08-04 00:38:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:38:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:38:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:38:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:38:34,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:38:34,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468454369] [2023-08-04 00:38:34,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468454369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:38:34,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:38:34,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:38:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648271285] [2023-08-04 00:38:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:38:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:38:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:38:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:38:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:38:34,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 00:38:34,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:38:34,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:38:34,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 00:38:34,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:39:13,143 INFO L124 PetriNetUnfolderBase]: 576290/730005 cut-off events. [2023-08-04 00:39:13,143 INFO L125 PetriNetUnfolderBase]: For 20613/20613 co-relation queries the response was YES. [2023-08-04 00:39:15,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466686 conditions, 730005 events. 576290/730005 cut-off events. For 20613/20613 co-relation queries the response was YES. Maximal size of possible extension queue 15711. Compared 4786626 event pairs, 485484 based on Foata normal form. 0/690942 useless extension candidates. Maximal degree in co-relation 432900. Up to 712500 conditions per place. [2023-08-04 00:39:17,754 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 00:39:17,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-04 00:39:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:39:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:39:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 00:39:17,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930388219544847 [2023-08-04 00:39:17,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 00:39:17,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 00:39:17,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:39:17,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 00:39:17,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:39:17,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:39:17,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:39:17,760 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 126 flow. Second operand 3 states and 443 transitions. [2023-08-04 00:39:17,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-04 00:39:17,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:39:17,766 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 136 flow [2023-08-04 00:39:17,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=136, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 00:39:17,767 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 00:39:17,767 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 136 flow [2023-08-04 00:39:17,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:39:17,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:39:17,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:39:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:39:17,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:39:17,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:39:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash 552674197, now seen corresponding path program 1 times [2023-08-04 00:39:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:39:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507403240] [2023-08-04 00:39:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:39:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:39:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:39:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:39:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:39:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507403240] [2023-08-04 00:39:17,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507403240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:39:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131938583] [2023-08-04 00:39:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:39:17,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:39:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:39:17,800 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) [2023-08-04 00:39:17,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:39:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:39:17,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:39:17,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:39:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:39:17,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:39:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131938583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:39:17,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:39:17,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:39:17,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925339792] [2023-08-04 00:39:17,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:39:17,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:39:17,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:39:17,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:39:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:39:17,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 00:39:17,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:39:17,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:39:17,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 00:39:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:39:56,480 INFO L124 PetriNetUnfolderBase]: 543278/690581 cut-off events. [2023-08-04 00:39:56,480 INFO L125 PetriNetUnfolderBase]: For 18135/18135 co-relation queries the response was YES. [2023-08-04 00:39:58,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381992 conditions, 690581 events. 543278/690581 cut-off events. For 18135/18135 co-relation queries the response was YES. Maximal size of possible extension queue 15497. Compared 4552027 event pairs, 459424 based on Foata normal form. 0/655841 useless extension candidates. Maximal degree in co-relation 1381953. Up to 668923 conditions per place. [2023-08-04 00:40:00,821 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:40:00,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 246 flow [2023-08-04 00:40:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:40:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:40:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-04 00:40:00,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970548862115127 [2023-08-04 00:40:00,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-04 00:40:00,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-04 00:40:00,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:00,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-04 00:40:00,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:00,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:00,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:00,825 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 136 flow. Second operand 3 states and 446 transitions. [2023-08-04 00:40:00,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 246 flow [2023-08-04 00:40:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:40:00,826 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 146 flow [2023-08-04 00:40:00,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 00:40:00,827 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 00:40:00,827 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 146 flow [2023-08-04 00:40:00,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:00,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:00,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:00,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:01,037 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,SelfDestructingSolverStorable12 [2023-08-04 00:40:01,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:40:01,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1541103316, now seen corresponding path program 1 times [2023-08-04 00:40:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:01,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179498373] [2023-08-04 00:40:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:40:01,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179498373] [2023-08-04 00:40:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179498373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047422706] [2023-08-04 00:40:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:01,064 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) [2023-08-04 00:40:01,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:40:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:01,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:40:01,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:40:01,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:40:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047422706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:01,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:40:01,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:40:01,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924843220] [2023-08-04 00:40:01,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:01,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:40:01,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:40:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:40:01,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 00:40:01,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:01,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:01,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 00:40:01,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:36,901 INFO L124 PetriNetUnfolderBase]: 512846/641426 cut-off events. [2023-08-04 00:40:36,902 INFO L125 PetriNetUnfolderBase]: For 15521/15521 co-relation queries the response was YES. [2023-08-04 00:40:39,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291939 conditions, 641426 events. 512846/641426 cut-off events. For 15521/15521 co-relation queries the response was YES. Maximal size of possible extension queue 14999. Compared 4060631 event pairs, 434270 based on Foata normal form. 0/613631 useless extension candidates. Maximal degree in co-relation 384726. Up to 627005 conditions per place. [2023-08-04 00:40:41,200 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 00:40:41,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 274 flow [2023-08-04 00:40:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:40:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:40:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-04 00:40:41,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 00:40:41,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-04 00:40:41,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-04 00:40:41,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:41,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-04 00:40:41,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:41,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:41,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:41,203 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 146 flow. Second operand 3 states and 450 transitions. [2023-08-04 00:40:41,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 274 flow [2023-08-04 00:40:41,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:40:41,205 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 156 flow [2023-08-04 00:40:41,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-04 00:40:41,205 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 00:40:41,206 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 156 flow [2023-08-04 00:40:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:41,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:41,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:41,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:40:41,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:40:41,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1122231319, now seen corresponding path program 1 times [2023-08-04 00:40:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260915959] [2023-08-04 00:40:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:40:41,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260915959] [2023-08-04 00:40:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260915959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408706968] [2023-08-04 00:40:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:41,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:41,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:40:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:41,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:40:41,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:40:41,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:40:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408706968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:41,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:40:41,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:40:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369016914] [2023-08-04 00:40:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:40:41,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:40:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:40:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 00:40:41,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:41,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 00:40:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:41:17,241 INFO L124 PetriNetUnfolderBase]: 500750/624398 cut-off events. [2023-08-04 00:41:17,242 INFO L125 PetriNetUnfolderBase]: For 10153/10153 co-relation queries the response was YES. [2023-08-04 00:41:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263356 conditions, 624398 events. 500750/624398 cut-off events. For 10153/10153 co-relation queries the response was YES. Maximal size of possible extension queue 14869. Compared 3844843 event pairs, 404846 based on Foata normal form. 0/601787 useless extension candidates. Maximal degree in co-relation 370844. Up to 574973 conditions per place. [2023-08-04 00:41:21,547 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 00:41:21,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 302 flow [2023-08-04 00:41:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:41:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:41:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 00:41:21,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607764390896921 [2023-08-04 00:41:21,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 00:41:21,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 00:41:21,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:41:21,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 00:41:21,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:21,551 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 156 flow. Second operand 3 states and 454 transitions. [2023-08-04 00:41:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 302 flow [2023-08-04 00:41:21,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:41:21,566 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 166 flow [2023-08-04 00:41:21,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-08-04 00:41:21,566 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 00:41:21,566 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 166 flow [2023-08-04 00:41:21,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:21,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:21,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:21,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:41:21,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:41:21,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:21,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2058818389, now seen corresponding path program 1 times [2023-08-04 00:41:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239704276] [2023-08-04 00:41:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:41:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239704276] [2023-08-04 00:41:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239704276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:41:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007666440] [2023-08-04 00:41:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:41:21,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:41:21,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:41:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:21,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:41:21,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:41:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:41:21,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:41:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:41:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007666440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:41:21,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:41:21,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:41:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656207309] [2023-08-04 00:41:21,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:41:21,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:41:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:41:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:41:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 00:41:21,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:21,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:21,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 00:41:21,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:41:50,888 INFO L124 PetriNetUnfolderBase]: 389704/482120 cut-off events. [2023-08-04 00:41:50,888 INFO L125 PetriNetUnfolderBase]: For 43953/43953 co-relation queries the response was YES. [2023-08-04 00:41:52,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011464 conditions, 482120 events. 389704/482120 cut-off events. For 43953/43953 co-relation queries the response was YES. Maximal size of possible extension queue 11678. Compared 2843223 event pairs, 276612 based on Foata normal form. 3/480395 useless extension candidates. Maximal degree in co-relation 355983. Up to 474490 conditions per place. [2023-08-04 00:41:54,345 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 00:41:54,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 58 transitions, 282 flow [2023-08-04 00:41:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:41:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:41:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-04 00:41:54,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783132530120482 [2023-08-04 00:41:54,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-04 00:41:54,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-04 00:41:54,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:41:54,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-04 00:41:54,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:54,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:54,349 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:54,349 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 166 flow. Second operand 4 states and 576 transitions. [2023-08-04 00:41:54,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 58 transitions, 282 flow [2023-08-04 00:41:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:41:54,567 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 178 flow [2023-08-04 00:41:54,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2023-08-04 00:41:54,567 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 00:41:54,567 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 178 flow [2023-08-04 00:41:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:54,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:54,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:54,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 00:41:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 00:41:54,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:54,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -716837964, now seen corresponding path program 1 times [2023-08-04 00:41:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442743874] [2023-08-04 00:41:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:41:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442743874] [2023-08-04 00:41:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442743874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:41:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563592912] [2023-08-04 00:41:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:54,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:41:54,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:41:54,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:41:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:54,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:41:54,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:41:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:41:54,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:41:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:41:54,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563592912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:41:54,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:41:54,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:41:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527927460] [2023-08-04 00:41:54,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:41:54,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:41:54,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:41:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:41:54,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 00:41:54,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:54,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:54,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 00:41:54,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:15,494 INFO L124 PetriNetUnfolderBase]: 303022/372454 cut-off events. [2023-08-04 00:42:15,494 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 00:42:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777479 conditions, 372454 events. 303022/372454 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 9749. Compared 2100629 event pairs, 217966 based on Foata normal form. 27/371185 useless extension candidates. Maximal degree in co-relation 273290. Up to 365929 conditions per place. [2023-08-04 00:42:18,038 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 54 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 00:42:18,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 326 flow [2023-08-04 00:42:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-04 00:42:18,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863453815261044 [2023-08-04 00:42:18,040 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-04 00:42:18,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-04 00:42:18,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:18,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-04 00:42:18,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,042 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 178 flow. Second operand 4 states and 584 transitions. [2023-08-04 00:42:18,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 326 flow [2023-08-04 00:42:18,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:18,104 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 185 flow [2023-08-04 00:42:18,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2023-08-04 00:42:18,105 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-04 00:42:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 185 flow [2023-08-04 00:42:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:18,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:18,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 00:42:18,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 00:42:18,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:18,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -340722124, now seen corresponding path program 1 times [2023-08-04 00:42:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:18,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636782184] [2023-08-04 00:42:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:18,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:42:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636782184] [2023-08-04 00:42:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636782184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:42:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549184303] [2023-08-04 00:42:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:42:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:42:18,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:42:18,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 00:42:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:18,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:42:18,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:42:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:42:18,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:42:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:42:18,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549184303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:42:18,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:42:18,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:42:18,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085625020] [2023-08-04 00:42:18,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:42:18,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:42:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:42:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:42:18,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 00:42:18,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 185 flow. Second operand has 5 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) [2023-08-04 00:42:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 00:42:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:35,205 INFO L124 PetriNetUnfolderBase]: 237520/289942 cut-off events. [2023-08-04 00:42:35,205 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 00:42:36,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605632 conditions, 289942 events. 237520/289942 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 8808. Compared 1592593 event pairs, 168724 based on Foata normal form. 243/289375 useless extension candidates. Maximal degree in co-relation 212642. Up to 275692 conditions per place. [2023-08-04 00:42:37,173 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 00:42:37,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 365 flow [2023-08-04 00:42:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-04 00:42:37,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943775100401606 [2023-08-04 00:42:37,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-04 00:42:37,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-04 00:42:37,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:37,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-04 00:42:37,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,177 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 185 flow. Second operand 4 states and 592 transitions. [2023-08-04 00:42:37,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 365 flow [2023-08-04 00:42:37,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 358 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:37,293 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 192 flow [2023-08-04 00:42:37,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-04 00:42:37,294 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-08-04 00:42:37,294 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 192 flow [2023-08-04 00:42:37,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2023-08-04 00:42:37,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:37,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:37,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 00:42:37,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 00:42:37,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:37,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash 498144534, now seen corresponding path program 1 times [2023-08-04 00:42:37,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:37,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301775438] [2023-08-04 00:42:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:37,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301775438] [2023-08-04 00:42:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301775438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:42:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86427629] [2023-08-04 00:42:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:37,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:42:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:42:37,544 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:42:37,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 00:42:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:37,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:42:37,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:42:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:37,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:42:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:37,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86427629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:42:37,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:42:37,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:42:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342430970] [2023-08-04 00:42:37,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:42:37,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:42:37,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:37,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:42:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:42:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 00:42:37,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:37,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 00:42:37,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:52,175 INFO L124 PetriNetUnfolderBase]: 214192/261673 cut-off events. [2023-08-04 00:42:52,175 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 00:42:53,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549490 conditions, 261673 events. 214192/261673 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8224. Compared 1393852 event pairs, 91720 based on Foata normal form. 2187/263050 useless extension candidates. Maximal degree in co-relation 192794. Up to 135913 conditions per place. [2023-08-04 00:42:54,052 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 70 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-04 00:42:54,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 404 flow [2023-08-04 00:42:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-04 00:42:54,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 00:42:54,053 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-04 00:42:54,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-04 00:42:54,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:54,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-04 00:42:54,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:54,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:54,056 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:54,056 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 192 flow. Second operand 4 states and 600 transitions. [2023-08-04 00:42:54,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 404 flow [2023-08-04 00:42:54,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:54,114 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 199 flow [2023-08-04 00:42:54,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-08-04 00:42:54,114 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 00:42:54,114 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 199 flow [2023-08-04 00:42:54,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:54,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:54,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:54,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 00:42:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:42:54,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:54,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -468345429, now seen corresponding path program 1 times [2023-08-04 00:42:54,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369450405] [2023-08-04 00:42:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 00:42:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:54,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369450405] [2023-08-04 00:42:54,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369450405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:42:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:42:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:42:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149180037] [2023-08-04 00:42:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:42:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:42:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:42:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:42:54,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 249 [2023-08-04 00:42:54,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 249 [2023-08-04 00:42:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:23,280 INFO L124 PetriNetUnfolderBase]: 1131763/1368093 cut-off events. [2023-08-04 00:44:23,280 INFO L125 PetriNetUnfolderBase]: For 477332/477332 co-relation queries the response was YES. [2023-08-04 00:44:29,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050916 conditions, 1368093 events. 1131763/1368093 cut-off events. For 477332/477332 co-relation queries the response was YES. Maximal size of possible extension queue 28160. Compared 7609723 event pairs, 332178 based on Foata normal form. 19441/1386680 useless extension candidates. Maximal degree in co-relation 3049314. Up to 825646 conditions per place.