/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:34:40,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:34:40,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:34:40,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:34:40,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:34:40,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:34:40,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:34:40,975 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:34:40,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:34:40,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:34:40,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:34:40,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:34:40,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:34:40,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:34:40,981 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:34:40,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:34:40,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:34:40,982 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:34:40,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:34:40,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:34:40,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:34:40,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:34:40,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:34:40,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:34:40,984 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:34:40,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:34:40,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:34:40,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:34:40,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:34:40,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:34:40,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:34:40,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:34:40,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:34:40,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:34:40,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:34:40,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:34:40,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:34:40,988 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:34:40,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:34:40,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:34:40,988 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:34:40,988 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:34:41,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:34:41,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:34:41,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:34:41,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:34:41,259 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:34:41,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 00:34:42,391 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:34:42,648 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:34:42,649 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 00:34:42,661 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c911956/2f2c40d1fb6f4e16acd3e0d02fcf6ae7/FLAGbb5d91fe3 [2023-08-04 00:34:42,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c911956/2f2c40d1fb6f4e16acd3e0d02fcf6ae7 [2023-08-04 00:34:42,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:34:42,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:34:42,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:34:42,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:34:42,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:34:42,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:34:42" (1/1) ... [2023-08-04 00:34:42,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ee157d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:42, skipping insertion in model container [2023-08-04 00:34:42,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:34:42" (1/1) ... [2023-08-04 00:34:42,742 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:34:42,911 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i[995,1008] [2023-08-04 00:34:43,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:34:43,156 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:34:43,168 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i[995,1008] [2023-08-04 00:34:43,185 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:34:43,187 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:34:43,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:34:43,284 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:34:43,285 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:34:43,290 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:34:43,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43 WrapperNode [2023-08-04 00:34:43,291 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:34:43,292 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:34:43,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:34:43,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:34:43,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,331 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,368 INFO L138 Inliner]: procedures = 177, calls = 87, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 220 [2023-08-04 00:34:43,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:34:43,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:34:43,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:34:43,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:34:43,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,412 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:34:43,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:34:43,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:34:43,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:34:43,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (1/1) ... [2023-08-04 00:34:43,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:34:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:43,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:34:43,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:34:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:34:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:34:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:34:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:34:43,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:34:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:34:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:34:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:34:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:34:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:34:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:34:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:34:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 00:34:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 00:34:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:34:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:34:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:34:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:34:43,526 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:34:43,701 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:34:43,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:34:44,110 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:34:44,367 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:34:44,368 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 00:34:44,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:34:44 BoogieIcfgContainer [2023-08-04 00:34:44,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:34:44,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:34:44,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:34:44,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:34:44,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:34:42" (1/3) ... [2023-08-04 00:34:44,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c25e672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:34:44, skipping insertion in model container [2023-08-04 00:34:44,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:43" (2/3) ... [2023-08-04 00:34:44,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c25e672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:34:44, skipping insertion in model container [2023-08-04 00:34:44,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:34:44" (3/3) ... [2023-08-04 00:34:44,379 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 00:34:44,386 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:34:44,393 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:34:44,393 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:34:44,393 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:34:44,458 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:34:44,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 00:34:44,707 INFO L124 PetriNetUnfolderBase]: 62/928 cut-off events. [2023-08-04 00:34:44,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 928 events. 62/928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5547 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 565. Up to 32 conditions per place. [2023-08-04 00:34:44,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 00:34:44,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 139 transitions, 298 flow [2023-08-04 00:34:44,723 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:34:44,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 139 transitions, 298 flow [2023-08-04 00:34:44,739 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 139 transitions, 298 flow [2023-08-04 00:34:44,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 139 transitions, 298 flow [2023-08-04 00:34:44,799 INFO L124 PetriNetUnfolderBase]: 14/432 cut-off events. [2023-08-04 00:34:44,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:44,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 432 events. 14/432 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1836 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 317. Up to 16 conditions per place. [2023-08-04 00:34:44,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-04 00:34:51,164 INFO L134 LiptonReduction]: Checked pairs total: 4537 [2023-08-04 00:34:51,165 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 00:34:51,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:34:51,181 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;@658ad8dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:34:51,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:34:51,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:34:51,187 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 00:34:51,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:51,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:51,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:34:51,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:34:51,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1313215347, now seen corresponding path program 1 times [2023-08-04 00:34:51,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:51,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918651060] [2023-08-04 00:34:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:34:51,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:34:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:34:51,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:34:51,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:34:51,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 00:34:51,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 00:34:51,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 00:34:51,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 00:34:51,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:34:51,409 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:34:51,416 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:34:51,417 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:34:51,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:34:51,484 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:34:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 00:34:52,172 INFO L124 PetriNetUnfolderBase]: 282/4218 cut-off events. [2023-08-04 00:34:52,172 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:34:52,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 4218 events. 282/4218 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40247 event pairs, 0 based on Foata normal form. 0/3735 useless extension candidates. Maximal degree in co-relation 3067. Up to 162 conditions per place. [2023-08-04 00:34:52,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 00:34:52,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 167 transitions, 382 flow [2023-08-04 00:34:52,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:34:52,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 167 transitions, 382 flow [2023-08-04 00:34:52,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 167 transitions, 382 flow [2023-08-04 00:34:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 167 transitions, 382 flow [2023-08-04 00:34:52,416 INFO L124 PetriNetUnfolderBase]: 39/1707 cut-off events. [2023-08-04 00:34:52,417 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:34:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1707 events. 39/1707 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 13015 event pairs, 0 based on Foata normal form. 0/1629 useless extension candidates. Maximal degree in co-relation 1393. Up to 81 conditions per place. [2023-08-04 00:34:52,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 5260 [2023-08-04 00:34:59,522 INFO L134 LiptonReduction]: Checked pairs total: 15203 [2023-08-04 00:34:59,522 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-04 00:34:59,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:34:59,525 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;@658ad8dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:34:59,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:34:59,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:34:59,545 INFO L124 PetriNetUnfolderBase]: 0/88 cut-off events. [2023-08-04 00:34:59,545 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:34:59,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:59,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:59,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:34:59,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1002706130, now seen corresponding path program 1 times [2023-08-04 00:34:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:59,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344912504] [2023-08-04 00:34:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:34:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344912504] [2023-08-04 00:34:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344912504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:59,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:34:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:34:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478569451] [2023-08-04 00:34:59,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:59,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:34:59,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:34:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:34:59,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 320 [2023-08-04 00:34:59,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:59,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:59,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 320 [2023-08-04 00:34:59,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:36:45,147 INFO L124 PetriNetUnfolderBase]: 634776/801706 cut-off events. [2023-08-04 00:36:45,147 INFO L125 PetriNetUnfolderBase]: For 45504/45504 co-relation queries the response was YES. [2023-08-04 00:36:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1633275 conditions, 801706 events. 634776/801706 cut-off events. For 45504/45504 co-relation queries the response was YES. Maximal size of possible extension queue 17658. Compared 5267525 event pairs, 538458 based on Foata normal form. 0/788928 useless extension candidates. Maximal degree in co-relation 480206. Up to 779254 conditions per place. [2023-08-04 00:36:50,773 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 41 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:36:50,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 244 flow [2023-08-04 00:36:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:36:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:36:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 00:36:50,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802083333333333 [2023-08-04 00:36:50,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 00:36:50,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 00:36:50,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:36:50,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 00:36:50,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:50,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:50,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:50,802 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 150 flow. Second operand 3 states and 557 transitions. [2023-08-04 00:36:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 244 flow [2023-08-04 00:36:50,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 55 transitions, 236 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-04 00:36:50,879 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 154 flow [2023-08-04 00:36:50,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-08-04 00:36:50,883 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 00:36:50,884 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 154 flow [2023-08-04 00:36:50,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:50,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:50,884 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:36:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:36:50,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:36:50,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1439194422, now seen corresponding path program 1 times [2023-08-04 00:36:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:50,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464620037] [2023-08-04 00:36:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:36:50,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464620037] [2023-08-04 00:36:50,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464620037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:36:50,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:36:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:36:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360700170] [2023-08-04 00:36:50,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:36:50,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:36:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:36:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:36:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:36:50,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 320 [2023-08-04 00:36:50,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:50,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:36:50,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 320 [2023-08-04 00:36:50,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand