/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_mix035.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:34:44,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:34:45,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:34:45,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:34:45,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:34:45,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:34:45,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:34:45,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:34:45,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:34:45,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:34:45,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:34:45,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:34:45,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:34:45,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:34:45,390 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:34:45,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:34:45,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:34:45,391 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:34:45,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:34:45,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:34:45,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:34:45,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:34:45,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:34:45,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:34:45,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:34:45,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:34:45,395 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:34:45,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:34:45,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:34:45,396 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:34:45,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:34:45,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:34:45,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:34:45,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:34:45,597 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:34:45,597 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:34:45,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix035.oepc_bound2.i [2023-08-03 23:34:46,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:34:46,699 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:34:46,699 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix035.oepc_bound2.i [2023-08-03 23:34:46,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f2a3f6d7/96dd30423b664b8396ee1d3fea979a39/FLAG67f781704 [2023-08-03 23:34:46,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f2a3f6d7/96dd30423b664b8396ee1d3fea979a39 [2023-08-03 23:34:46,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:34:46,724 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:34:46,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:34:46,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:34:46,727 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:34:46,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:34:46" (1/1) ... [2023-08-03 23:34:46,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446b83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:46, skipping insertion in model container [2023-08-03 23:34:46,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:34:46" (1/1) ... [2023-08-03 23:34:46,763 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:34:46,890 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_mix035.oepc_bound2.i[945,958] [2023-08-03 23:34:47,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:34:47,058 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:34:47,066 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_mix035.oepc_bound2.i[945,958] [2023-08-03 23:34:47,077 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:34:47,079 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:34:47,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:34:47,146 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:34:47,146 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:34:47,151 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:34:47,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47 WrapperNode [2023-08-03 23:34:47,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:34:47,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:34:47,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:34:47,152 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:34:47,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,200 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2023-08-03 23:34:47,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:34:47,201 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:34:47,201 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:34:47,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:34:47,206 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:34:47,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:34:47,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:34:47,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:34:47,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (1/1) ... [2023-08-03 23:34:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:34:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:34:47,254 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 23:34:47,256 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 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:34:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:34:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:34:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:34:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:34:47,283 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 23:34:47,375 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:34:47,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:34:47,635 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:34:47,728 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:34:47,728 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:34:47,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:34:47 BoogieIcfgContainer [2023-08-03 23:34:47,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:34:47,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:34:47,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:34:47,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:34:47,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:34:46" (1/3) ... [2023-08-03 23:34:47,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c93f57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:34:47, skipping insertion in model container [2023-08-03 23:34:47,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:34:47" (2/3) ... [2023-08-03 23:34:47,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c93f57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:34:47, skipping insertion in model container [2023-08-03 23:34:47,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:34:47" (3/3) ... [2023-08-03 23:34:47,738 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix035.oepc_bound2.i [2023-08-03 23:34:47,743 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:34:47,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:34:47,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:34:47,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:34:47,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:34:47,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 23:34:47,941 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 23:34:47,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:34:47,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2038 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-03 23:34:47,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 23:34:47,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 105 transitions, 225 flow [2023-08-03 23:34:47,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:34:47,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 105 transitions, 225 flow [2023-08-03 23:34:47,965 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 105 transitions, 225 flow [2023-08-03 23:34:47,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 105 transitions, 225 flow [2023-08-03 23:34:47,986 INFO L124 PetriNetUnfolderBase]: 6/227 cut-off events. [2023-08-03 23:34:47,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:34:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 227 events. 6/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 684 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-03 23:34:47,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 1552 [2023-08-03 23:34:50,602 INFO L134 LiptonReduction]: Checked pairs total: 3908 [2023-08-03 23:34:50,602 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-03 23:34:50,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:34:50,615 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;@ae1e4bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:34:50,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:34:50,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:34:50,619 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:34:50,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:34:50,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:34:50,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:34:50,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:34:50,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:34:50,623 INFO L85 PathProgramCache]: Analyzing trace with hash -956390194, now seen corresponding path program 1 times [2023-08-03 23:34:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:34:50,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059291765] [2023-08-03 23:34:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:34:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:34:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:34:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:34:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:34:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059291765] [2023-08-03 23:34:50,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059291765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:34:50,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:34:50,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:34:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971971256] [2023-08-03 23:34:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:34:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:34:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:34:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:34:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:34:50,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 218 [2023-08-03 23:34:50,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 23:34:50,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:34:50,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 218 [2023-08-03 23:34:50,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:34:51,026 INFO L124 PetriNetUnfolderBase]: 579/1015 cut-off events. [2023-08-03 23:34:51,026 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-03 23:34:51,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2071 conditions, 1015 events. 579/1015 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4884 event pairs, 435 based on Foata normal form. 0/903 useless extension candidates. Maximal degree in co-relation 2052. Up to 935 conditions per place. [2023-08-03 23:34:51,036 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 25 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 23:34:51,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 133 flow [2023-08-03 23:34:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:34:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:34:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-03 23:34:51,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657492354740061 [2023-08-03 23:34:51,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-03 23:34:51,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-03 23:34:51,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:34:51,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-03 23:34:51,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 23:34:51,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 23:34:51,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 23:34:51,066 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 370 transitions. [2023-08-03 23:34:51,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 133 flow [2023-08-03 23:34:51,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:34:51,071 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:34:51,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:34:51,074 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:34:51,075 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:34:51,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 23:34:51,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:34:51,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:34:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:34:51,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:34:51,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:34:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash -949374024, now seen corresponding path program 1 times [2023-08-03 23:34:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:34:51,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171733751] [2023-08-03 23:34:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:34:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:34:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:34:51,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:34:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:34:51,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:34:51,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:34:51,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:34:51,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:34:51,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:34:51,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:34:51,133 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:34:51,134 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:34:51,135 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:34:51,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:34:51,153 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:34:51,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 358 flow [2023-08-03 23:34:51,265 INFO L124 PetriNetUnfolderBase]: 93/1416 cut-off events. [2023-08-03 23:34:51,266 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:34:51,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1416 events. 93/1416 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9849 event pairs, 0 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 1021. Up to 54 conditions per place. [2023-08-03 23:34:51,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 161 transitions, 358 flow [2023-08-03 23:34:51,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 132 transitions, 300 flow [2023-08-03 23:34:51,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:34:51,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 132 transitions, 300 flow [2023-08-03 23:34:51,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 132 transitions, 300 flow [2023-08-03 23:34:51,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 132 transitions, 300 flow [2023-08-03 23:34:51,314 INFO L124 PetriNetUnfolderBase]: 12/633 cut-off events. [2023-08-03 23:34:51,314 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:34:51,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 633 events. 12/633 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3323 event pairs, 0 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 499. Up to 27 conditions per place. [2023-08-03 23:34:51,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 4396 [2023-08-03 23:34:53,856 INFO L134 LiptonReduction]: Checked pairs total: 17333 [2023-08-03 23:34:53,856 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 23:34:53,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:34:53,858 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;@ae1e4bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:34:53,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:34:53,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:34:53,863 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-03 23:34:53,863 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:34:53,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:34:53,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:34:53,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:34:53,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:34:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1070167479, now seen corresponding path program 1 times [2023-08-03 23:34:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:34:53,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576134197] [2023-08-03 23:34:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:34:53,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:34:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:34:53,917 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 23:34:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:34:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576134197] [2023-08-03 23:34:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576134197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:34:53,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:34:53,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:34:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475403703] [2023-08-03 23:34:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:34:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:34:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:34:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:34:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:34:53,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:34:53,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:34:53,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:34:53,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:34:53,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:35:09,365 INFO L124 PetriNetUnfolderBase]: 150910/200324 cut-off events. [2023-08-03 23:35:09,366 INFO L125 PetriNetUnfolderBase]: For 10780/10780 co-relation queries the response was YES. [2023-08-03 23:35:09,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404101 conditions, 200324 events. 150910/200324 cut-off events. For 10780/10780 co-relation queries the response was YES. Maximal size of possible extension queue 5758. Compared 1370971 event pairs, 118610 based on Foata normal form. 0/181728 useless extension candidates. Maximal degree in co-relation 85276. Up to 191286 conditions per place. [2023-08-03 23:35:10,759 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 40 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 23:35:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 232 flow [2023-08-03 23:35:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:35:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:35:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-03 23:35:10,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853333333333334 [2023-08-03 23:35:10,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-03 23:35:10,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-03 23:35:10,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:35:10,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-03 23:35:10,762 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) [2023-08-03 23:35:10,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:35:10,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:35:10,764 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 136 flow. Second operand 3 states and 439 transitions. [2023-08-03 23:35:10,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 232 flow [2023-08-03 23:35:10,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 226 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:35:10,774 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 142 flow [2023-08-03 23:35:10,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-03 23:35:10,775 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 23:35:10,775 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 142 flow [2023-08-03 23:35:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 23:35:10,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:35:10,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:35:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:35:10,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:35:10,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:35:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1219475393, now seen corresponding path program 1 times [2023-08-03 23:35:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:35:10,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358552814] [2023-08-03 23:35:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:35:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:10,839 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 23:35:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:35:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358552814] [2023-08-03 23:35:10,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358552814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:35:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170115455] [2023-08-03 23:35:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:35:10,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:35:10,842 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 23:35:10,852 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 23:35:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:10,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:35:10,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:35:10,968 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 23:35:10,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:35:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170115455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:35:10,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:35:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:35:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336178941] [2023-08-03 23:35:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:35:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:35:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:35:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:35:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:35:10,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 250 [2023-08-03 23:35:10,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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 23:35:10,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:35:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 250 [2023-08-03 23:35:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:35:26,312 INFO L124 PetriNetUnfolderBase]: 150870/200479 cut-off events. [2023-08-03 23:35:26,313 INFO L125 PetriNetUnfolderBase]: For 9965/9965 co-relation queries the response was YES. [2023-08-03 23:35:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403649 conditions, 200479 events. 150870/200479 cut-off events. For 9965/9965 co-relation queries the response was YES. Maximal size of possible extension queue 5760. Compared 1372441 event pairs, 91710 based on Foata normal form. 25/181988 useless extension candidates. Maximal degree in co-relation 100088. Up to 191157 conditions per place. [2023-08-03 23:35:27,420 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 47 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 23:35:27,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 270 flow [2023-08-03 23:35:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:35:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:35:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 707 transitions. [2023-08-03 23:35:27,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656 [2023-08-03 23:35:27,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 707 transitions. [2023-08-03 23:35:27,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 707 transitions. [2023-08-03 23:35:27,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:35:27,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 707 transitions. [2023-08-03 23:35:27,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 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 23:35:27,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:35:27,426 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:35:27,426 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 142 flow. Second operand 5 states and 707 transitions. [2023-08-03 23:35:27,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 270 flow [2023-08-03 23:35:27,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:35:27,428 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 156 flow [2023-08-03 23:35:27,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-03 23:35:27,429 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-03 23:35:27,429 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 156 flow [2023-08-03 23:35:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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 23:35:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:35:27,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:35:27,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 23:35:27,633 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 [2023-08-03 23:35:27,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:35:27,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:35:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash 411477388, now seen corresponding path program 1 times [2023-08-03 23:35:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:35:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702011005] [2023-08-03 23:35:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:35:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:35:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:35:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702011005] [2023-08-03 23:35:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702011005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:35:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883365480] [2023-08-03 23:35:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:27,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:35:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:35:27,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:35:27,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:35:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:27,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:35:27,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:35:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:35:27,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:35:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883365480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:35:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:35:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:35:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455420592] [2023-08-03 23:35:27,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:35:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:35:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:35:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:35:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:35:27,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:35:27,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 23:35:27,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:35:27,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:35:27,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:35:42,317 INFO L124 PetriNetUnfolderBase]: 146266/198071 cut-off events. [2023-08-03 23:35:42,317 INFO L125 PetriNetUnfolderBase]: For 9275/9275 co-relation queries the response was YES. [2023-08-03 23:35:42,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395230 conditions, 198071 events. 146266/198071 cut-off events. For 9275/9275 co-relation queries the response was YES. Maximal size of possible extension queue 5929. Compared 1412862 event pairs, 117292 based on Foata normal form. 0/181036 useless extension candidates. Maximal degree in co-relation 127439. Up to 184350 conditions per place. [2023-08-03 23:35:43,753 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:35:43,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 284 flow [2023-08-03 23:35:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:35:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:35:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-03 23:35:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946666666666667 [2023-08-03 23:35:43,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-03 23:35:43,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-03 23:35:43,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:35:43,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-03 23:35:43,757 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) [2023-08-03 23:35:43,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:35:43,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 23:35:43,759 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 156 flow. Second operand 3 states and 446 transitions. [2023-08-03 23:35:43,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 284 flow [2023-08-03 23:35:43,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:35:43,761 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 164 flow [2023-08-03 23:35:43,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-03 23:35:43,761 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 23:35:43,761 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 164 flow [2023-08-03 23:35:43,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 23:35:43,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:35:43,762 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:35:43,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:35:43,965 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 [2023-08-03 23:35:43,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:35:43,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:35:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1807761607, now seen corresponding path program 1 times [2023-08-03 23:35:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:35:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893947054] [2023-08-03 23:35:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:35:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:35:44,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:35:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893947054] [2023-08-03 23:35:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893947054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:35:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103242354] [2023-08-03 23:35:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:35:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:35:44,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:35:44,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:35:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:44,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:35:44,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:35:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:35:44,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:35:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:35:44,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103242354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:35:44,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:35:44,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:35:44,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715473244] [2023-08-03 23:35:44,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:35:44,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:35:44,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:35:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:35:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:35:44,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 250 [2023-08-03 23:35:44,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 164 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) [2023-08-03 23:35:44,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:35:44,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 250 [2023-08-03 23:35:44,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:35:56,956 INFO L124 PetriNetUnfolderBase]: 126173/169352 cut-off events. [2023-08-03 23:35:56,957 INFO L125 PetriNetUnfolderBase]: For 8780/8780 co-relation queries the response was YES. [2023-08-03 23:35:57,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339038 conditions, 169352 events. 126173/169352 cut-off events. For 8780/8780 co-relation queries the response was YES. Maximal size of possible extension queue 5210. Compared 1162277 event pairs, 74825 based on Foata normal form. 5/154589 useless extension candidates. Maximal degree in co-relation 83194. Up to 158221 conditions per place. [2023-08-03 23:35:57,972 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:35:57,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 285 flow [2023-08-03 23:35:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:35:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:35:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2023-08-03 23:35:57,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2023-08-03 23:35:57,976 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2023-08-03 23:35:57,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2023-08-03 23:35:57,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:35:57,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2023-08-03 23:35:57,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 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 23:35:57,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:35:57,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:35:57,979 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 164 flow. Second operand 4 states and 575 transitions. [2023-08-03 23:35:57,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 285 flow [2023-08-03 23:35:57,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:35:57,981 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 159 flow [2023-08-03 23:35:57,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-03 23:35:57,982 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:35:57,982 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 159 flow [2023-08-03 23:35:57,982 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) [2023-08-03 23:35:57,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:35:57,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:35:57,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 23:35:58,186 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 [2023-08-03 23:35:58,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:35:58,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:35:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash 755713659, now seen corresponding path program 1 times [2023-08-03 23:35:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:35:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492356459] [2023-08-03 23:35:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:35:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:35:58,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:35:58,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492356459] [2023-08-03 23:35:58,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492356459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:35:58,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124868120] [2023-08-03 23:35:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:35:58,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:35:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:35:58,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:35:58,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:35:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:35:58,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:35:58,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:35:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:35:58,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:35:58,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124868120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:35:58,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:35:58,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:35:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627153971] [2023-08-03 23:35:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:35:58,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:35:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:35:58,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:35:58,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:35:58,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 250 [2023-08-03 23:35:58,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 159 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) [2023-08-03 23:35:58,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:35:58,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 250 [2023-08-03 23:35:58,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:36:10,408 INFO L124 PetriNetUnfolderBase]: 124933/168418 cut-off events. [2023-08-03 23:36:10,408 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2023-08-03 23:36:10,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336620 conditions, 168418 events. 124933/168418 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 5306. Compared 1171649 event pairs, 32068 based on Foata normal form. 400/154610 useless extension candidates. Maximal degree in co-relation 126993. Up to 154115 conditions per place. [2023-08-03 23:36:11,615 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 69 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-03 23:36:11,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 373 flow [2023-08-03 23:36:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:36:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:36:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 728 transitions. [2023-08-03 23:36:11,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824 [2023-08-03 23:36:11,617 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 728 transitions. [2023-08-03 23:36:11,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 728 transitions. [2023-08-03 23:36:11,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:36:11,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 728 transitions. [2023-08-03 23:36:11,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 23:36:11,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:36:11,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 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 23:36:11,621 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 159 flow. Second operand 5 states and 728 transitions. [2023-08-03 23:36:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 373 flow [2023-08-03 23:36:11,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:36:11,625 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 169 flow [2023-08-03 23:36:11,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-03 23:36:11,625 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-03 23:36:11,625 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 169 flow [2023-08-03 23:36:11,626 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) [2023-08-03 23:36:11,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:36:11,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:36:11,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:36:11,838 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 [2023-08-03 23:36:11,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:36:11,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:36:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1472007944, now seen corresponding path program 1 times [2023-08-03 23:36:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:36:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694823999] [2023-08-03 23:36:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:36:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:36:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:36:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:36:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:36:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694823999] [2023-08-03 23:36:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694823999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:36:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640846188] [2023-08-03 23:36:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:36:11,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:36:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:36:11,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:36:11,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:36:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:36:11,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:36:11,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:36:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:36:11,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:36:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:36:11,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640846188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:36:11,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:36:11,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:36:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749779832] [2023-08-03 23:36:11,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:36:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:36:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:36:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:36:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:36:12,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 250 [2023-08-03 23:36:12,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 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 23:36:12,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:36:12,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 250 [2023-08-03 23:36:12,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:36:22,351 INFO L124 PetriNetUnfolderBase]: 104198/139283 cut-off events. [2023-08-03 23:36:22,352 INFO L125 PetriNetUnfolderBase]: For 8760/8760 co-relation queries the response was YES. [2023-08-03 23:36:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279970 conditions, 139283 events. 104198/139283 cut-off events. For 8760/8760 co-relation queries the response was YES. Maximal size of possible extension queue 4647. Compared 930574 event pairs, 65348 based on Foata normal form. 100/127915 useless extension candidates. Maximal degree in co-relation 105799. Up to 127416 conditions per place. [2023-08-03 23:36:23,314 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 61 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-03 23:36:23,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 343 flow [2023-08-03 23:36:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:36:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:36:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-03 23:36:23,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2023-08-03 23:36:23,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-03 23:36:23,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-03 23:36:23,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:36:23,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-03 23:36:23,319 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) [2023-08-03 23:36:23,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:36:23,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:36:23,320 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 169 flow. Second operand 4 states and 588 transitions. [2023-08-03 23:36:23,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 343 flow [2023-08-03 23:36:23,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 338 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:36:23,324 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 162 flow [2023-08-03 23:36:23,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=156, 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=162, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2023-08-03 23:36:23,325 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 23:36:23,325 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 162 flow [2023-08-03 23:36:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 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 23:36:23,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:36:23,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:36:23,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 23:36:23,530 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 [2023-08-03 23:36:23,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:36:23,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:36:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash 454553713, now seen corresponding path program 1 times [2023-08-03 23:36:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:36:23,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84456843] [2023-08-03 23:36:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:36:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:36:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:36:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:36:23,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:36:23,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84456843] [2023-08-03 23:36:23,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84456843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:36:23,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906260209] [2023-08-03 23:36:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:36:23,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:36:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:36:23,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:36:23,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:36:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:36:23,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:36:23,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:36:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:36:23,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:36:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906260209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:36:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:36:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:36:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363507342] [2023-08-03 23:36:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:36:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:36:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:36:23,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:36:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:36:23,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:36:23,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:36:23,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:36:23,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:36:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:36:29,640 INFO L124 PetriNetUnfolderBase]: 57198/80408 cut-off events. [2023-08-03 23:36:29,640 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-03 23:36:29,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162995 conditions, 80408 events. 57198/80408 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 2762. Compared 556965 event pairs, 2958 based on Foata normal form. 10000/84140 useless extension candidates. Maximal degree in co-relation 61409. Up to 58800 conditions per place. [2023-08-03 23:36:29,905 INFO L140 encePairwiseOnDemand]: 248/250 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2023-08-03 23:36:29,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 362 flow [2023-08-03 23:36:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:36:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:36:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 597 transitions. [2023-08-03 23:36:29,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597 [2023-08-03 23:36:29,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 597 transitions. [2023-08-03 23:36:29,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 597 transitions. [2023-08-03 23:36:29,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:36:29,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 597 transitions. [2023-08-03 23:36:29,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 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 23:36:29,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:36:29,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 23:36:29,909 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 162 flow. Second operand 4 states and 597 transitions. [2023-08-03 23:36:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 362 flow [2023-08-03 23:36:30,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:36:30,577 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2023-08-03 23:36:30,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2023-08-03 23:36:30,577 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:36:30,577 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2023-08-03 23:36:30,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:36:30,578 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:36:30,578 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:36:30,578 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:36:30,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:36:30,785 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 [2023-08-03 23:36:30,785 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:36:30,786 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:36:30,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,855 INFO L124 PetriNetUnfolderBase]: 93/1416 cut-off events. [2023-08-03 23:36:30,855 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:36:30,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1416 events. 93/1416 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9849 event pairs, 0 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 1021. Up to 54 conditions per place. [2023-08-03 23:36:30,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:36:30,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 358 flow [2023-08-03 23:36:30,929 INFO L124 PetriNetUnfolderBase]: 93/1416 cut-off events. [2023-08-03 23:36:30,929 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:36:30,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1416 events. 93/1416 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9849 event pairs, 0 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 1021. Up to 54 conditions per place. [2023-08-03 23:36:30,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 7180 [2023-08-03 23:36:33,748 INFO L134 LiptonReduction]: Checked pairs total: 25689 [2023-08-03 23:36:33,748 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-03 23:36:33,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:36:33,749 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;@ae1e4bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:36:33,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:36:33,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:36:33,751 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-08-03 23:36:33,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:36:33,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:36:33,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:36:33,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:36:33,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:36:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 29100674, now seen corresponding path program 1 times [2023-08-03 23:36:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:36:33,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950671449] [2023-08-03 23:36:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:36:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:36:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:36:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:36:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:36:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950671449] [2023-08-03 23:36:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950671449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:36:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:36:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:36:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891172183] [2023-08-03 23:36:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:36:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:36:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:36:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:36:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:36:33,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 281 [2023-08-03 23:36:33,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 152 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) [2023-08-03 23:36:33,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:36:33,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 281 [2023-08-03 23:36:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:37:31,537 INFO L124 PetriNetUnfolderBase]: 633758/832627 cut-off events. [2023-08-03 23:37:31,537 INFO L125 PetriNetUnfolderBase]: For 9470/9470 co-relation queries the response was YES. [2023-08-03 23:37:33,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635986 conditions, 832627 events. 633758/832627 cut-off events. For 9470/9470 co-relation queries the response was YES. Maximal size of possible extension queue 21673. Compared 6397493 event pairs, 105182 based on Foata normal form. 17577/756194 useless extension candidates. Maximal degree in co-relation 1377082. Up to 729279 conditions per place. [2023-08-03 23:37:36,123 INFO L140 encePairwiseOnDemand]: 275/281 looper letters, 75 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-03 23:37:36,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 397 flow [2023-08-03 23:37:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:37:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:37:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-03 23:37:36,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5776986951364176 [2023-08-03 23:37:36,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-03 23:37:36,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-03 23:37:36,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:37:36,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-03 23:37:36,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 23:37:36,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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 23:37:36,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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 23:37:36,127 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 152 flow. Second operand 3 states and 487 transitions. [2023-08-03 23:37:36,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 397 flow [2023-08-03 23:37:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 391 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:37:36,133 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 165 flow [2023-08-03 23:37:36,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-03 23:37:36,134 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-03 23:37:36,134 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 165 flow [2023-08-03 23:37:36,134 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) [2023-08-03 23:37:36,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:37:36,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:37:36,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:37:36,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:37:36,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:37:36,135 INFO L85 PathProgramCache]: Analyzing trace with hash -816585562, now seen corresponding path program 1 times [2023-08-03 23:37:36,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:37:36,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635092100] [2023-08-03 23:37:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:37:36,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:37:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:37:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:37:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:37:36,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635092100] [2023-08-03 23:37:36,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635092100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:37:36,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:37:36,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:37:36,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48798989] [2023-08-03 23:37:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:37:36,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:37:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:37:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:37:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:37:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 281 [2023-08-03 23:37:36,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 23:37:36,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:37:36,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 281 [2023-08-03 23:37:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand