/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:43:20,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:43:20,231 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:43:20,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:43:20,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:43:20,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:43:20,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:43:20,270 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:43:20,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:43:20,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:43:20,275 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:43:20,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:43:20,276 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:43:20,277 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:43:20,277 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:43:20,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:43:20,278 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:43:20,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:43:20,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:43:20,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:43:20,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:43:20,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:43:20,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:43:20,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:43:20,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:43:20,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:43:20,281 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:43:20,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:43:20,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:43:20,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:43:20,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:43:20,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:43:20,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:43:20,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:43:20,284 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:43:20,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:43:20,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:43:20,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:43:20,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:43:20,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:43:20,535 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:43:20,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 17:43:21,673 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:43:21,908 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:43:21,917 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 17:43:21,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126a801bb/6e0910cbe38f427ea0de352ae730274a/FLAGd31d97c6c [2023-08-03 17:43:21,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126a801bb/6e0910cbe38f427ea0de352ae730274a [2023-08-03 17:43:21,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:43:21,958 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:43:21,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:43:21,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:43:21,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:43:21,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:43:21" (1/1) ... [2023-08-03 17:43:21,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d15f7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:21, skipping insertion in model container [2023-08-03 17:43:21,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:43:21" (1/1) ... [2023-08-03 17:43:22,022 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:43:22,148 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_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 17:43:22,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:43:22,348 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:43:22,362 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_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 17:43:22,384 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:43:22,385 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:43:22,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:43:22,461 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:43:22,461 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:43:22,467 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:43:22,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22 WrapperNode [2023-08-03 17:43:22,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:43:22,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:43:22,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:43:22,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:43:22,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,512 INFO L138 Inliner]: procedures = 177, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-08-03 17:43:22,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:43:22,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:43:22,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:43:22,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:43:22,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:43:22,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:43:22,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:43:22,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:43:22,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (1/1) ... [2023-08-03 17:43:22,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:43:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:43:22,572 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 17:43:22,578 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 17:43:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:43:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:43:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:43:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:43:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:43:22,607 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:43:22,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:43:22,608 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:43:22,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:43:22,608 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 17:43:22,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 17:43:22,609 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 17:43:22,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 17:43:22,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:43:22,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:43:22,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:43:22,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:43:22,611 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 17:43:22,720 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:43:22,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:43:23,063 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:43:23,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:43:23,186 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 17:43:23,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:43:23 BoogieIcfgContainer [2023-08-03 17:43:23,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:43:23,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:43:23,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:43:23,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:43:23,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:43:21" (1/3) ... [2023-08-03 17:43:23,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416c4a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:43:23, skipping insertion in model container [2023-08-03 17:43:23,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:43:22" (2/3) ... [2023-08-03 17:43:23,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416c4a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:43:23, skipping insertion in model container [2023-08-03 17:43:23,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:43:23" (3/3) ... [2023-08-03 17:43:23,202 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix055_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 17:43:23,209 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:43:23,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:43:23,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 17:43:23,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:43:23,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:43:23,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,504 INFO L124 PetriNetUnfolderBase]: 62/923 cut-off events. [2023-08-03 17:43:23,504 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:43:23,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 923 events. 62/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5627 event pairs, 0 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 552. Up to 32 conditions per place. [2023-08-03 17:43:23,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:43:23,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 156 transitions, 332 flow [2023-08-03 17:43:23,644 INFO L124 PetriNetUnfolderBase]: 62/923 cut-off events. [2023-08-03 17:43:23,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:43:23,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 923 events. 62/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5627 event pairs, 0 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 552. Up to 32 conditions per place. [2023-08-03 17:43:23,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 4358 [2023-08-03 17:43:27,254 INFO L134 LiptonReduction]: Checked pairs total: 10770 [2023-08-03 17:43:27,254 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-03 17:43:27,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:43:27,270 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;@2d8e1a94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:43:27,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 17:43:27,273 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:43:27,273 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-03 17:43:27,273 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:43:27,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:43:27,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 17:43:27,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:43:27,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:43:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash 20274861, now seen corresponding path program 1 times [2023-08-03 17:43:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:43:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282342663] [2023-08-03 17:43:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:43:27,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:43:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:43:27,611 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 17:43:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:43:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282342663] [2023-08-03 17:43:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282342663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:43:27,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:43:27,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 17:43:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943260879] [2023-08-03 17:43:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:43:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:43:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:43:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:43:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:43:27,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 283 [2023-08-03 17:43:27,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 17:43:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:43:27,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 283 [2023-08-03 17:43:27,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:43:30,162 INFO L124 PetriNetUnfolderBase]: 16573/25197 cut-off events. [2023-08-03 17:43:30,163 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-03 17:43:30,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49226 conditions, 25197 events. 16573/25197 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 179004 event pairs, 4936 based on Foata normal form. 750/23516 useless extension candidates. Maximal degree in co-relation 41279. Up to 15874 conditions per place. [2023-08-03 17:43:30,327 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 59 selfloop transitions, 2 changer transitions 4/72 dead transitions. [2023-08-03 17:43:30,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 303 flow [2023-08-03 17:43:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:43:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:43:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-03 17:43:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606595995288575 [2023-08-03 17:43:30,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-03 17:43:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-03 17:43:30,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:43:30,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-03 17:43:30,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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 17:43:30,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 17:43:30,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 17:43:30,364 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 108 flow. Second operand 3 states and 476 transitions. [2023-08-03 17:43:30,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 303 flow [2023-08-03 17:43:30,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 72 transitions, 303 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 17:43:30,371 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 104 flow [2023-08-03 17:43:30,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-03 17:43:30,376 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-03 17:43:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 104 flow [2023-08-03 17:43:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 17:43:30,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:43:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:43:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:43:30,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:43:30,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:43:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1990624377, now seen corresponding path program 1 times [2023-08-03 17:43:30,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:43:30,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841826467] [2023-08-03 17:43:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:43:30,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:43:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:43:30,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:43:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:43:30,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:43:30,451 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:43:30,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-03 17:43:30,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-03 17:43:30,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-03 17:43:30,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-03 17:43:30,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-03 17:43:30,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-03 17:43:30,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-03 17:43:30,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:43:30,455 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 17:43:30,457 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:43:30,457 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:43:30,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:43:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,123 INFO L124 PetriNetUnfolderBase]: 282/4269 cut-off events. [2023-08-03 17:43:31,123 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 17:43:31,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 4269 events. 282/4269 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41015 event pairs, 0 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 3091. Up to 162 conditions per place. [2023-08-03 17:43:31,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:43:31,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 189 transitions, 426 flow [2023-08-03 17:43:31,683 INFO L124 PetriNetUnfolderBase]: 282/4269 cut-off events. [2023-08-03 17:43:31,683 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 17:43:31,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 4269 events. 282/4269 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41015 event pairs, 0 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 3091. Up to 162 conditions per place. [2023-08-03 17:43:31,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 10636 [2023-08-03 17:43:35,439 INFO L134 LiptonReduction]: Checked pairs total: 34308 [2023-08-03 17:43:35,442 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-03 17:43:35,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:43:35,455 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;@2d8e1a94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:43:35,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 17:43:35,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:43:35,457 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 17:43:35,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:43:35,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:43:35,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 17:43:35,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-03 17:43:35,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:43:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 31293244, now seen corresponding path program 1 times [2023-08-03 17:43:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:43:35,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561805399] [2023-08-03 17:43:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:43:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:43:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:43:35,554 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 17:43:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:43:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561805399] [2023-08-03 17:43:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561805399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:43:35,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:43:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 17:43:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340742342] [2023-08-03 17:43:35,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:43:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:43:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:43:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:43:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:43:35,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 325 [2023-08-03 17:43:35,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 17:43:35,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:43:35,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 325 [2023-08-03 17:43:35,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand