/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_mix044.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:43:38,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:43:38,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:43:38,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:43:38,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:43:38,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:43:38,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:43:38,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:43:38,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:43:38,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:43:38,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:43:38,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:43:38,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:43:38,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:43:38,375 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:43:38,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:43:38,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:43:38,376 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:43:38,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:43:38,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:43:38,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:43:38,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:43:38,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:43:38,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:43:38,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:43:38,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:43:38,387 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:43:38,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:43:38,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:43:38,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:43:38,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:43:38,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:43:38,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:43:38,389 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:43:38,389 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:43:38,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:43:38,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:43:38,390 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:43:38,390 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:43:38,390 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:43:38,390 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:43:38,390 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:43:38,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:43:38,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:43:38,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:43:38,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:43:38,674 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:43:38,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix044.opt_bound2.i [2023-08-03 23:43:39,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:43:40,089 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:43:40,090 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix044.opt_bound2.i [2023-08-03 23:43:40,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb1b9080/c516cc493cb34a54abef9f7280a09448/FLAGb458dc569 [2023-08-03 23:43:40,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb1b9080/c516cc493cb34a54abef9f7280a09448 [2023-08-03 23:43:40,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:43:40,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:43:40,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:43:40,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:43:40,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:43:40,124 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,125 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769e1711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40, skipping insertion in model container [2023-08-03 23:43:40,125 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,177 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:43:40,302 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_mix044.opt_bound2.i[944,957] [2023-08-03 23:43:40,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:43:40,495 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:43:40,510 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_mix044.opt_bound2.i[944,957] [2023-08-03 23:43:40,517 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:43:40,524 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:43:40,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:43:40,598 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:43:40,598 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:43:40,603 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:43:40,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40 WrapperNode [2023-08-03 23:43:40,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:43:40,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:43:40,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:43:40,605 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:43:40,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,647 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 200 [2023-08-03 23:43:40,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:43:40,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:43:40,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:43:40,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:43:40,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:43:40,706 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:43:40,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:43:40,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:43:40,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (1/1) ... [2023-08-03 23:43:40,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:43:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:43:40,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:43:40,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:43:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:43:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:43:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:43:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:43:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:43:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:43:40,785 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:43:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:43:40,786 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:43:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:43:40,786 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:43:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 23:43:40,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 23:43:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:43:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:43:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:43:40,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:43:40,789 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:43:40,948 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:43:40,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:43:41,341 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:43:41,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:43:41,468 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 23:43:41,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:43:41 BoogieIcfgContainer [2023-08-03 23:43:41,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:43:41,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:43:41,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:43:41,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:43:41,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:43:40" (1/3) ... [2023-08-03 23:43:41,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bff47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:43:41, skipping insertion in model container [2023-08-03 23:43:41,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:43:40" (2/3) ... [2023-08-03 23:43:41,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bff47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:43:41, skipping insertion in model container [2023-08-03 23:43:41,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:43:41" (3/3) ... [2023-08-03 23:43:41,480 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix044.opt_bound2.i [2023-08-03 23:43:41,487 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:43:41,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:43:41,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:43:41,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:43:41,548 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:43:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 158 transitions, 336 flow [2023-08-03 23:43:41,820 INFO L124 PetriNetUnfolderBase]: 62/945 cut-off events. [2023-08-03 23:43:41,820 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:43:41,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 945 events. 62/945 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5900 event pairs, 0 based on Foata normal form. 0/829 useless extension candidates. Maximal degree in co-relation 550. Up to 32 conditions per place. [2023-08-03 23:43:41,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 158 transitions, 336 flow [2023-08-03 23:43:41,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 274 flow [2023-08-03 23:43:41,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:43:41,851 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 127 transitions, 274 flow [2023-08-03 23:43:41,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 127 transitions, 274 flow [2023-08-03 23:43:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 127 transitions, 274 flow [2023-08-03 23:43:41,912 INFO L124 PetriNetUnfolderBase]: 14/449 cut-off events. [2023-08-03 23:43:41,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:43:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 449 events. 14/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2107 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 302. Up to 16 conditions per place. [2023-08-03 23:43:41,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2023-08-03 23:43:45,403 INFO L134 LiptonReduction]: Checked pairs total: 5585 [2023-08-03 23:43:45,403 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-03 23:43:45,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:43:45,418 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;@4b553fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:43:45,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:43:45,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:43:45,424 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-03 23:43:45,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:43:45,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:45,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:43:45,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 23:43:45,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1131920083, now seen corresponding path program 1 times [2023-08-03 23:43:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:45,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026168761] [2023-08-03 23:43:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:43:45,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:43:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:43:45,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:43:45,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:43:45,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 23:43:45,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-03 23:43:45,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 23:43:45,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 23:43:45,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:43:45,571 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:43:45,573 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:43:45,573 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:43:45,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:43:45,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:43:45,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 191 transitions, 430 flow [2023-08-03 23:43:46,236 INFO L124 PetriNetUnfolderBase]: 282/4423 cut-off events. [2023-08-03 23:43:46,237 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 23:43:46,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4712 conditions, 4423 events. 282/4423 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 43463 event pairs, 0 based on Foata normal form. 0/3886 useless extension candidates. Maximal degree in co-relation 3164. Up to 162 conditions per place. [2023-08-03 23:43:46,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 191 transitions, 430 flow [2023-08-03 23:43:46,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 160 transitions, 368 flow [2023-08-03 23:43:46,277 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:43:46,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 160 transitions, 368 flow [2023-08-03 23:43:46,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 160 transitions, 368 flow [2023-08-03 23:43:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 160 transitions, 368 flow [2023-08-03 23:43:46,539 INFO L124 PetriNetUnfolderBase]: 39/1912 cut-off events. [2023-08-03 23:43:46,539 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 23:43:46,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 1912 events. 39/1912 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 15523 event pairs, 0 based on Foata normal form. 0/1780 useless extension candidates. Maximal degree in co-relation 1490. Up to 81 conditions per place. [2023-08-03 23:43:46,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 6508 [2023-08-03 23:43:49,932 INFO L134 LiptonReduction]: Checked pairs total: 22806 [2023-08-03 23:43:49,932 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-03 23:43:49,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:43:49,935 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;@4b553fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:43:49,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:43:49,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:43:49,944 INFO L124 PetriNetUnfolderBase]: 0/96 cut-off events. [2023-08-03 23:43:49,944 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:43:49,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:49,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:43:49,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 23:43:49,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2093798130, now seen corresponding path program 1 times [2023-08-03 23:43:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:49,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622414883] [2023-08-03 23:43:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:43:50,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:43:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622414883] [2023-08-03 23:43:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622414883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:43:50,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:43:50,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:43:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000288749] [2023-08-03 23:43:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:43:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:43:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:43:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:43:50,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:43:50,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 298 [2023-08-03 23:43:50,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:50,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:43:50,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 298 [2023-08-03 23:43:50,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:45:50,884 INFO L124 PetriNetUnfolderBase]: 947916/1235620 cut-off events. [2023-08-03 23:45:50,901 INFO L125 PetriNetUnfolderBase]: For 56148/56148 co-relation queries the response was YES. [2023-08-03 23:45:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2459013 conditions, 1235620 events. 947916/1235620 cut-off events. For 56148/56148 co-relation queries the response was YES. Maximal size of possible extension queue 31799. Compared 9508972 event pairs, 807918 based on Foata normal form. 0/1136310 useless extension candidates. Maximal degree in co-relation 726332. Up to 1157914 conditions per place. [2023-08-03 23:46:04,882 INFO L140 encePairwiseOnDemand]: 295/298 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-03 23:46:04,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 65 transitions, 268 flow [2023-08-03 23:46:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:46:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:46:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-08-03 23:46:04,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5950782997762863 [2023-08-03 23:46:04,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-08-03 23:46:04,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-08-03 23:46:04,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:46:04,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-08-03 23:46:04,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:04,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:04,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:04,927 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 170 flow. Second operand 3 states and 532 transitions. [2023-08-03 23:46:04,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 65 transitions, 268 flow [2023-08-03 23:46:05,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 65 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-03 23:46:05,011 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 174 flow [2023-08-03 23:46:05,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2023-08-03 23:46:05,037 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-03 23:46:05,043 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 174 flow [2023-08-03 23:46:05,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:05,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:46:05,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:46:05,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:46:05,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 23:46:05,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:46:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash -644545177, now seen corresponding path program 1 times [2023-08-03 23:46:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:46:05,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972928756] [2023-08-03 23:46:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:46:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:46:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:46:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972928756] [2023-08-03 23:46:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972928756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:46:05,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728484407] [2023-08-03 23:46:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:46:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:46:05,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:46:05,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:46:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:05,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:46:05,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:46:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:46:05,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:46:05,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728484407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:46:05,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:46:05,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:46:05,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166644595] [2023-08-03 23:46:05,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:46:05,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:46:05,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:46:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:46:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:46:05,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 298 [2023-08-03 23:46:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:46:05,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 298 [2023-08-03 23:46:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand