/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_safe018_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:33:33,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:33:33,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:33:33,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:33:33,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:33:33,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:33:33,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:33:33,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:33:33,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:33:33,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:33:33,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:33:33,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:33:33,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:33:33,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:33:33,455 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:33:33,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:33:33,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:33:33,455 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:33:33,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:33:33,456 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:33:33,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:33:33,457 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:33:33,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:33:33,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:33:33,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:33:33,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:33:33,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:33:33,460 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:33:33,460 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:33:33,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:33:33,460 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:33:33,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:33:33,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:33:33,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:33:33,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:33:33,659 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:33:33,660 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:33:33,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.opt_bound2.i [2023-08-03 18:33:34,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:33:34,872 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:33:34,873 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.opt_bound2.i [2023-08-03 18:33:34,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad954174/f5d3a6485b434a75a64d42160f9efcc2/FLAG0274239ca [2023-08-03 18:33:34,911 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad954174/f5d3a6485b434a75a64d42160f9efcc2 [2023-08-03 18:33:34,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:33:34,914 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:33:34,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:33:34,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:33:34,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:33:34,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:33:34" (1/1) ... [2023-08-03 18:33:34,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c092c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:34, skipping insertion in model container [2023-08-03 18:33:34,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:33:34" (1/1) ... [2023-08-03 18:33:34,960 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:33:35,076 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_safe018_power.opt_bound2.i[994,1007] [2023-08-03 18:33:35,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:33:35,200 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:33:35,214 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_safe018_power.opt_bound2.i[994,1007] [2023-08-03 18:33:35,219 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:33:35,220 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:33:35,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:33:35,259 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:33:35,259 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:33:35,263 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:33:35,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35 WrapperNode [2023-08-03 18:33:35,264 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:33:35,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:33:35,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:33:35,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:33:35,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,294 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 202 [2023-08-03 18:33:35,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:33:35,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:33:35,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:33:35,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:33:35,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:33:35,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:33:35,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:33:35,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:33:35,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (1/1) ... [2023-08-03 18:33:35,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:33:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:33:35,347 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 18:33:35,393 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 18:33:35,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:33:35,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:33:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:33:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:33:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:33:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:33:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:33:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:33:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:33:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:33:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:33:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:33:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:33:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:33:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:33:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:33:35,421 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 18:33:35,539 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:33:35,540 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:33:35,956 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:33:36,229 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:33:36,230 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:33:36,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:33:36 BoogieIcfgContainer [2023-08-03 18:33:36,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:33:36,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:33:36,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:33:36,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:33:36,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:33:34" (1/3) ... [2023-08-03 18:33:36,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bde0757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:33:36, skipping insertion in model container [2023-08-03 18:33:36,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:33:35" (2/3) ... [2023-08-03 18:33:36,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bde0757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:33:36, skipping insertion in model container [2023-08-03 18:33:36,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:33:36" (3/3) ... [2023-08-03 18:33:36,240 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe018_power.opt_bound2.i [2023-08-03 18:33:36,246 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:33:36,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:33:36,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 18:33:36,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:33:36,311 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:33:36,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,448 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 18:33:36,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:33:36,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1935 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 18:33:36,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:33:36,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:33:36,533 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 18:33:36,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:33:36,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1935 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 18:33:36,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 2396 [2023-08-03 18:33:42,635 INFO L134 LiptonReduction]: Checked pairs total: 5762 [2023-08-03 18:33:42,635 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-03 18:33:42,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:33:42,684 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;@ea01856, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:33:42,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 18:33:42,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:33:42,688 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 18:33:42,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:33:42,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:33:42,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:33:42,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 18:33:42,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:33:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash 909254312, now seen corresponding path program 1 times [2023-08-03 18:33:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:33:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882860665] [2023-08-03 18:33:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:33:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:33:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:33:42,920 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 18:33:42,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:33:42,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882860665] [2023-08-03 18:33:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882860665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:33:42,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:33:42,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:33:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607328664] [2023-08-03 18:33:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:33:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:33:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:33:42,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:33:42,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:33:42,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 277 [2023-08-03 18:33:42,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 18:33:42,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:33:42,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 277 [2023-08-03 18:33:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:33:43,462 INFO L124 PetriNetUnfolderBase]: 1677/2671 cut-off events. [2023-08-03 18:33:43,462 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 18:33:43,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5385 conditions, 2671 events. 1677/2671 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13815 event pairs, 1008 based on Foata normal form. 0/2231 useless extension candidates. Maximal degree in co-relation 5364. Up to 2570 conditions per place. [2023-08-03 18:33:43,475 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 28 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-03 18:33:43,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 143 flow [2023-08-03 18:33:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:33:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:33:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-03 18:33:43,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48856799037304455 [2023-08-03 18:33:43,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-03 18:33:43,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-03 18:33:43,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:33:43,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-03 18:33:43,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:33:43,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 18:33:43,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 18:33:43,507 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 75 flow. Second operand 3 states and 406 transitions. [2023-08-03 18:33:43,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 143 flow [2023-08-03 18:33:43,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 143 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:33:43,511 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 83 flow [2023-08-03 18:33:43,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-03 18:33:43,515 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-03 18:33:43,516 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 83 flow [2023-08-03 18:33:43,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 18:33:43,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:33:43,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:33:43,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:33:43,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 18:33:43,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:33:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1884876736, now seen corresponding path program 1 times [2023-08-03 18:33:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:33:43,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096365047] [2023-08-03 18:33:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:33:43,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:33:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:33:43,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:33:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:33:43,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:33:43,609 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:33:43,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 18:33:43,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 18:33:43,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 18:33:43,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 18:33:43,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 18:33:43,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 18:33:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:33:43,613 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:33:43,614 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:33:43,614 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:33:43,659 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:33:43,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,794 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 18:33:43,794 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:33:43,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9369 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 18:33:43,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:33:43,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:33:43,907 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 18:33:43,908 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:33:43,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9369 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 18:33:43,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 5708 [2023-08-03 18:33:51,080 INFO L134 LiptonReduction]: Checked pairs total: 15897 [2023-08-03 18:33:51,080 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-03 18:33:51,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:33:51,082 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;@ea01856, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:33:51,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 18:33:51,085 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:33:51,085 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-03 18:33:51,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:33:51,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:33:51,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:33:51,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 18:33:51,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:33:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1224298623, now seen corresponding path program 1 times [2023-08-03 18:33:51,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:33:51,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258791220] [2023-08-03 18:33:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:33:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:33:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:33:51,124 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 18:33:51,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:33:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258791220] [2023-08-03 18:33:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258791220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:33:51,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:33:51,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:33:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966548257] [2023-08-03 18:33:51,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:33:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:33:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:33:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:33:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:33:51,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 307 [2023-08-03 18:33:51,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 18:33:51,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:33:51,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 307 [2023-08-03 18:33:51,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:34:56,394 INFO L124 PetriNetUnfolderBase]: 363272/474039 cut-off events. [2023-08-03 18:34:56,394 INFO L125 PetriNetUnfolderBase]: For 9312/9312 co-relation queries the response was YES. [2023-08-03 18:34:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941503 conditions, 474039 events. 363272/474039 cut-off events. For 9312/9312 co-relation queries the response was YES. Maximal size of possible extension queue 10899. Compared 3144542 event pairs, 293960 based on Foata normal form. 0/411190 useless extension candidates. Maximal degree in co-relation 203071. Up to 455689 conditions per place. [2023-08-03 18:34:58,898 INFO L140 encePairwiseOnDemand]: 304/307 looper letters, 42 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 18:34:58,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 228 flow [2023-08-03 18:34:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:34:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:34:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-03 18:34:58,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501628664495114 [2023-08-03 18:34:58,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-03 18:34:58,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-03 18:34:58,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:34:58,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-03 18:34:58,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 18:34:58,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 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 18:34:58,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 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 18:34:58,903 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 130 flow. Second operand 3 states and 462 transitions. [2023-08-03 18:34:58,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 228 flow [2023-08-03 18:34:58,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 222 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:34:58,913 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 136 flow [2023-08-03 18:34:58,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-03 18:34:58,914 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-03 18:34:58,914 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 136 flow [2023-08-03 18:34:58,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 18:34:58,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:34:58,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:34:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:34:58,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 18:34:58,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:34:58,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1598236465, now seen corresponding path program 1 times [2023-08-03 18:34:58,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:34:58,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040940724] [2023-08-03 18:34:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:34:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:34:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:34:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:34:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:34:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040940724] [2023-08-03 18:34:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040940724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:34:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668379114] [2023-08-03 18:34:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:34:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:34:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:34:58,957 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 18:34:58,960 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 18:34:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:34:59,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:34:59,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:34:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:34:59,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:34:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:34:59,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668379114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:34:59,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:34:59,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:34:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11269361] [2023-08-03 18:34:59,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:34:59,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:34:59,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:34:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:34:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:34:59,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 307 [2023-08-03 18:34:59,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 18:34:59,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:34:59,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 307 [2023-08-03 18:34:59,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:35:50,178 INFO L124 PetriNetUnfolderBase]: 301714/390457 cut-off events. [2023-08-03 18:35:50,178 INFO L125 PetriNetUnfolderBase]: For 6280/6280 co-relation queries the response was YES. [2023-08-03 18:35:51,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774494 conditions, 390457 events. 301714/390457 cut-off events. For 6280/6280 co-relation queries the response was YES. Maximal size of possible extension queue 9430. Compared 2486404 event pairs, 190828 based on Foata normal form. 4/340220 useless extension candidates. Maximal degree in co-relation 202856. Up to 375577 conditions per place. [2023-08-03 18:35:52,328 INFO L140 encePairwiseOnDemand]: 303/307 looper letters, 47 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-03 18:35:52,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 260 flow [2023-08-03 18:35:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:35:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:35:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-03 18:35:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49185667752442996 [2023-08-03 18:35:52,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-03 18:35:52,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-03 18:35:52,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:35:52,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-03 18:35:52,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 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 18:35:52,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 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 18:35:52,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 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 18:35:52,335 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 136 flow. Second operand 4 states and 604 transitions. [2023-08-03 18:35:52,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 260 flow [2023-08-03 18:35:52,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:35:52,337 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 154 flow [2023-08-03 18:35:52,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 18:35:52,337 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2023-08-03 18:35:52,338 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 154 flow [2023-08-03 18:35:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 18:35:52,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:35:52,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:35:52,357 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 18:35:52,544 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 18:35:52,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 18:35:52,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:35:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1372428067, now seen corresponding path program 1 times [2023-08-03 18:35:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:35:52,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763333845] [2023-08-03 18:35:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:35:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:52,601 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 18:35:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:35:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763333845] [2023-08-03 18:35:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763333845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:35:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318352153] [2023-08-03 18:35:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:52,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:35:52,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:35:52,603 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 18:35:52,605 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 18:35:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:52,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:35:52,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:35:52,719 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 18:35:52,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:35:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318352153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:35:52,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:35:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:35:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703532237] [2023-08-03 18:35:52,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:35:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:35:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:35:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:35:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:35:52,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 307 [2023-08-03 18:35:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 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 18:35:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:35:52,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 307 [2023-08-03 18:35:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand