/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix002.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:01:42,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:01:42,335 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:01:42,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:01:42,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:01:42,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:01:42,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:01:42,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:01:42,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:01:42,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:01:42,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:01:42,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:01:42,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:01:42,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:01:42,354 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:01:42,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:01:42,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:01:42,355 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:01:42,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:01:42,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:01:42,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:01:42,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:01:42,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:01:42,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:01:42,356 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:01:42,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:01:42,357 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:01:42,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:01:42,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:01:42,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:01:42,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:01:42,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:01:42,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:01:42,358 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:01:42,359 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:01:42,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:01:42,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:01:42,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:01:42,523 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:01:42,523 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:01:42,524 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix002.opt_bound2.i [2023-08-03 23:01:43,400 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:01:43,557 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:01:43,557 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix002.opt_bound2.i [2023-08-03 23:01:43,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/025d806e5/e4ce9bbfb836446e8349953005e815a4/FLAG1c5e4d441 [2023-08-03 23:01:43,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/025d806e5/e4ce9bbfb836446e8349953005e815a4 [2023-08-03 23:01:43,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:01:43,964 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:01:43,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:01:43,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:01:43,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:01:43,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:01:43" (1/1) ... [2023-08-03 23:01:43,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410617f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:43, skipping insertion in model container [2023-08-03 23:01:43,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:01:43" (1/1) ... [2023-08-03 23:01:43,997 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:01:44,107 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_mix002.opt_bound2.i[944,957] [2023-08-03 23:01:44,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:01:44,270 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:01:44,278 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_mix002.opt_bound2.i[944,957] [2023-08-03 23:01:44,283 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:01:44,284 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:01:44,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:01:44,355 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:01:44,355 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:01:44,360 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:01:44,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44 WrapperNode [2023-08-03 23:01:44,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:01:44,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:01:44,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:01:44,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:01:44,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,397 INFO L138 Inliner]: procedures = 176, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 177 [2023-08-03 23:01:44,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:01:44,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:01:44,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:01:44,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:01:44,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:01:44,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:01:44,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:01:44,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:01:44,444 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (1/1) ... [2023-08-03 23:01:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:01:44,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:01:44,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:01:44,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:01:44,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:01:44,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:01:44,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:01:44,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:01:44,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:01:44,496 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:01:44,496 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:01:44,496 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:01:44,496 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:01:44,496 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:01:44,497 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:01:44,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:01:44,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:01:44,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:01:44,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:01:44,498 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:01:44,620 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:01:44,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:01:44,854 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:01:44,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:01:44,971 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:01:44,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:01:44 BoogieIcfgContainer [2023-08-03 23:01:44,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:01:44,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:01:44,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:01:44,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:01:44,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:01:43" (1/3) ... [2023-08-03 23:01:44,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f2b1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:01:44, skipping insertion in model container [2023-08-03 23:01:44,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:01:44" (2/3) ... [2023-08-03 23:01:44,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f2b1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:01:44, skipping insertion in model container [2023-08-03 23:01:44,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:01:44" (3/3) ... [2023-08-03 23:01:44,980 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix002.opt_bound2.i [2023-08-03 23:01:44,985 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:01:44,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:01:44,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:01:44,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:01:45,036 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:01:45,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 23:01:45,186 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-03 23:01:45,186 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:01:45,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2047 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-03 23:01:45,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 23:01:45,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 107 transitions, 229 flow [2023-08-03 23:01:45,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:01:45,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 107 transitions, 229 flow [2023-08-03 23:01:45,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 107 transitions, 229 flow [2023-08-03 23:01:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 107 transitions, 229 flow [2023-08-03 23:01:45,231 INFO L124 PetriNetUnfolderBase]: 6/229 cut-off events. [2023-08-03 23:01:45,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:01:45,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 229 events. 6/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 691 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-03 23:01:45,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 1552 [2023-08-03 23:01:47,927 INFO L134 LiptonReduction]: Checked pairs total: 2923 [2023-08-03 23:01:47,927 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-03 23:01:47,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:01:47,948 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;@2c608dd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:01:47,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:01:47,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:01:47,951 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:01:47,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:01:47,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:01:47,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:01:47,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:01:47,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:01:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash -247343448, now seen corresponding path program 1 times [2023-08-03 23:01:47,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:01:47,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571870504] [2023-08-03 23:01:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:01:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:01:48,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:01:48,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571870504] [2023-08-03 23:01:48,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571870504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:01:48,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:01:48,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:01:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753043399] [2023-08-03 23:01:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:01:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:01:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:01:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:01:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:01:48,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 223 [2023-08-03 23:01:48,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:48,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:01:48,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 223 [2023-08-03 23:01:48,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:01:48,328 INFO L124 PetriNetUnfolderBase]: 523/929 cut-off events. [2023-08-03 23:01:48,329 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-03 23:01:48,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 929 events. 523/929 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4184 event pairs, 280 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1860. Up to 848 conditions per place. [2023-08-03 23:01:48,337 INFO L140 encePairwiseOnDemand]: 220/223 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-03 23:01:48,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 127 flow [2023-08-03 23:01:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:01:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:01:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-03 23:01:48,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650224215246636 [2023-08-03 23:01:48,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-03 23:01:48,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-03 23:01:48,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:01:48,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-03 23:01:48,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:48,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:48,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:48,364 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 67 flow. Second operand 3 states and 378 transitions. [2023-08-03 23:01:48,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 127 flow [2023-08-03 23:01:48,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:01:48,367 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 75 flow [2023-08-03 23:01:48,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-03 23:01:48,370 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 23:01:48,370 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 75 flow [2023-08-03 23:01:48,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:48,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:01:48,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:01:48,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:01:48,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:01:48,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:01:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash -253317580, now seen corresponding path program 1 times [2023-08-03 23:01:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:01:48,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649449974] [2023-08-03 23:01:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:01:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:01:48,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:01:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:01:48,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:01:48,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:01:48,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:01:48,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:01:48,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:01:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:01:48,436 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:01:48,437 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:01:48,437 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:01:48,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:01:48,458 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:01:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:01:48,591 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 23:01:48,592 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:01:48,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9840 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 23:01:48,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:01:48,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 134 transitions, 304 flow [2023-08-03 23:01:48,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:01:48,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:01:48,598 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:01:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 134 transitions, 304 flow [2023-08-03 23:01:48,651 INFO L124 PetriNetUnfolderBase]: 12/635 cut-off events. [2023-08-03 23:01:48,651 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:01:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 635 events. 12/635 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3319 event pairs, 0 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 501. Up to 27 conditions per place. [2023-08-03 23:01:48,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 4396 [2023-08-03 23:01:51,242 INFO L134 LiptonReduction]: Checked pairs total: 16176 [2023-08-03 23:01:51,244 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-03 23:01:51,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:01:51,252 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;@2c608dd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:01:51,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:01:51,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:01:51,261 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-03 23:01:51,261 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:01:51,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:01:51,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:01:51,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:01:51,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:01:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1919223413, now seen corresponding path program 1 times [2023-08-03 23:01:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:01:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340732624] [2023-08-03 23:01:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:01:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:01:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:01:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:01:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:01:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340732624] [2023-08-03 23:01:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340732624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:01:51,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:01:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:01:51,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011018103] [2023-08-03 23:01:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:01:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:01:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:01:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:01:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:01:51,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 254 [2023-08-03 23:01:51,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:01:51,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:01:51,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 254 [2023-08-03 23:01:51,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:01:59,624 INFO L124 PetriNetUnfolderBase]: 78164/106484 cut-off events. [2023-08-03 23:01:59,624 INFO L125 PetriNetUnfolderBase]: For 5244/5244 co-relation queries the response was YES. [2023-08-03 23:01:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212995 conditions, 106484 events. 78164/106484 cut-off events. For 5244/5244 co-relation queries the response was YES. Maximal size of possible extension queue 4646. Compared 788164 event pairs, 63366 based on Foata normal form. 0/98661 useless extension candidates. Maximal degree in co-relation 61126. Up to 100362 conditions per place. [2023-08-03 23:02:00,154 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 36 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-03 23:02:00,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 220 flow [2023-08-03 23:02:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:02:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:02:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-03 23:02:00,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866141732283464 [2023-08-03 23:02:00,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-03 23:02:00,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-03 23:02:00,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:00,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-03 23:02:00,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:00,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:00,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:00,159 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 136 flow. Second operand 3 states and 447 transitions. [2023-08-03 23:02:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 220 flow [2023-08-03 23:02:00,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 214 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:02:00,164 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 142 flow [2023-08-03 23:02:00,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-03 23:02:00,165 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 23:02:00,165 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 142 flow [2023-08-03 23:02:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:00,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:00,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:02:00,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:02:00,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:00,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1434879092, now seen corresponding path program 1 times [2023-08-03 23:02:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:00,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785992985] [2023-08-03 23:02:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:02:00,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785992985] [2023-08-03 23:02:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785992985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:02:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245738499] [2023-08-03 23:02:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:02:00,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:02:00,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:02:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:00,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:02:00,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:02:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:02:00,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:02:00,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245738499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:02:00,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:02:00,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:02:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904244632] [2023-08-03 23:02:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:02:00,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:02:00,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:02:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:02:00,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 254 [2023-08-03 23:02:00,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:00,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:00,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 254 [2023-08-03 23:02:00,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:08,547 INFO L124 PetriNetUnfolderBase]: 78152/106361 cut-off events. [2023-08-03 23:02:08,548 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2023-08-03 23:02:08,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212419 conditions, 106361 events. 78152/106361 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 4631. Compared 786057 event pairs, 57817 based on Foata normal form. 9/98746 useless extension candidates. Maximal degree in co-relation 136659. Up to 100315 conditions per place. [2023-08-03 23:02:09,049 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 39 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-03 23:02:09,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 242 flow [2023-08-03 23:02:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:02:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:02:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 719 transitions. [2023-08-03 23:02:09,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661417322834645 [2023-08-03 23:02:09,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 719 transitions. [2023-08-03 23:02:09,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 719 transitions. [2023-08-03 23:02:09,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:09,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 719 transitions. [2023-08-03 23:02:09,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:09,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:09,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:09,055 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 142 flow. Second operand 5 states and 719 transitions. [2023-08-03 23:02:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 242 flow [2023-08-03 23:02:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:02:09,057 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 156 flow [2023-08-03 23:02:09,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-03 23:02:09,057 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-03 23:02:09,058 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 156 flow [2023-08-03 23:02:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:09,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:09,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:09,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:02:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:09,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:09,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash 580061191, now seen corresponding path program 1 times [2023-08-03 23:02:09,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405513834] [2023-08-03 23:02:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:09,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:02:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405513834] [2023-08-03 23:02:09,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405513834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:02:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650847570] [2023-08-03 23:02:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:02:09,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:02:09,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:02:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:09,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:02:09,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:02:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:02:09,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:02:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650847570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:02:09,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:02:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:02:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880358113] [2023-08-03 23:02:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:02:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:02:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:02:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:02:09,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 254 [2023-08-03 23:02:09,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:09,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:09,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 254 [2023-08-03 23:02:09,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:17,262 INFO L124 PetriNetUnfolderBase]: 75822/102426 cut-off events. [2023-08-03 23:02:17,263 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2023-08-03 23:02:17,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205485 conditions, 102426 events. 75822/102426 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 4563. Compared 741095 event pairs, 59934 based on Foata normal form. 0/95156 useless extension candidates. Maximal degree in co-relation 59076. Up to 96840 conditions per place. [2023-08-03 23:02:17,754 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 42 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 23:02:17,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 264 flow [2023-08-03 23:02:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:02:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:02:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-03 23:02:17,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931758530183727 [2023-08-03 23:02:17,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-03 23:02:17,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-03 23:02:17,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:17,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-03 23:02:17,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:17,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:17,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:17,759 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 156 flow. Second operand 3 states and 452 transitions. [2023-08-03 23:02:17,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 264 flow [2023-08-03 23:02:17,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 257 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:02:17,761 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 164 flow [2023-08-03 23:02:17,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-03 23:02:17,763 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 23:02:17,763 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 164 flow [2023-08-03 23:02:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:17,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:17,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:17,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:02:17,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:17,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:17,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1800912525, now seen corresponding path program 1 times [2023-08-03 23:02:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696522641] [2023-08-03 23:02:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:02:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696522641] [2023-08-03 23:02:18,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696522641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:02:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983548760] [2023-08-03 23:02:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:02:18,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:02:18,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:02:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:18,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:02:18,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:02:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:02:18,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:02:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:02:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983548760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:02:18,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:02:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:02:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428038889] [2023-08-03 23:02:18,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:02:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:02:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:02:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:02:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 254 [2023-08-03 23:02:18,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:18,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:18,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 254 [2023-08-03 23:02:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:23,983 INFO L124 PetriNetUnfolderBase]: 59515/79324 cut-off events. [2023-08-03 23:02:23,984 INFO L125 PetriNetUnfolderBase]: For 3708/3708 co-relation queries the response was YES. [2023-08-03 23:02:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159674 conditions, 79324 events. 59515/79324 cut-off events. For 3708/3708 co-relation queries the response was YES. Maximal size of possible extension queue 3794. Compared 550928 event pairs, 38349 based on Foata normal form. 3/73950 useless extension candidates. Maximal degree in co-relation 56731. Up to 75373 conditions per place. [2023-08-03 23:02:24,586 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 40 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 23:02:24,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 58 transitions, 257 flow [2023-08-03 23:02:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:02:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:02:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2023-08-03 23:02:24,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738188976377953 [2023-08-03 23:02:24,588 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2023-08-03 23:02:24,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2023-08-03 23:02:24,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:24,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2023-08-03 23:02:24,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:24,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:24,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:24,591 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 164 flow. Second operand 4 states and 583 transitions. [2023-08-03 23:02:24,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 58 transitions, 257 flow [2023-08-03 23:02:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:02:24,594 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 159 flow [2023-08-03 23:02:24,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-03 23:02:24,594 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:02:24,594 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 159 flow [2023-08-03 23:02:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:24,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:24,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:24,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:02:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:24,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:24,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -574810332, now seen corresponding path program 1 times [2023-08-03 23:02:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227474639] [2023-08-03 23:02:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:02:24,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227474639] [2023-08-03 23:02:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227474639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:02:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636563919] [2023-08-03 23:02:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:24,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:24,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:02:24,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:02:24,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:02:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:24,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:02:24,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:02:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:02:24,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:02:24,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636563919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:02:24,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:02:24,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:02:24,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371995252] [2023-08-03 23:02:24,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:02:24,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:02:24,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:24,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:02:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:02:24,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 254 [2023-08-03 23:02:24,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:24,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:24,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 254 [2023-08-03 23:02:24,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:30,806 INFO L124 PetriNetUnfolderBase]: 59107/79111 cut-off events. [2023-08-03 23:02:30,806 INFO L125 PetriNetUnfolderBase]: For 3211/3211 co-relation queries the response was YES. [2023-08-03 23:02:30,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159039 conditions, 79111 events. 59107/79111 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 3828. Compared 556099 event pairs, 17122 based on Foata normal form. 144/74020 useless extension candidates. Maximal degree in co-relation 56484. Up to 74007 conditions per place. [2023-08-03 23:02:31,192 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 55 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-03 23:02:31,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 321 flow [2023-08-03 23:02:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:02:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:02:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2023-08-03 23:02:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5779527559055118 [2023-08-03 23:02:31,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2023-08-03 23:02:31,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2023-08-03 23:02:31,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:31,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2023-08-03 23:02:31,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:31,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:31,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:31,197 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 159 flow. Second operand 5 states and 734 transitions. [2023-08-03 23:02:31,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 321 flow [2023-08-03 23:02:31,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:02:31,199 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 169 flow [2023-08-03 23:02:31,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-03 23:02:31,200 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-03 23:02:31,200 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 169 flow [2023-08-03 23:02:31,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:31,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:31,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:31,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:02:31,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:31,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:31,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 43010535, now seen corresponding path program 1 times [2023-08-03 23:02:31,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551011276] [2023-08-03 23:02:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:31,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:02:31,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:31,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551011276] [2023-08-03 23:02:31,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551011276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:02:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840804846] [2023-08-03 23:02:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:31,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:31,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:02:31,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:02:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:02:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:31,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:02:31,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:02:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:02:31,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:02:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:02:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840804846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:02:31,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:02:31,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:02:31,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687843846] [2023-08-03 23:02:31,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:02:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:02:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:02:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:02:31,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 254 [2023-08-03 23:02:31,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:31,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:31,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 254 [2023-08-03 23:02:31,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:36,713 INFO L124 PetriNetUnfolderBase]: 49312/65428 cut-off events. [2023-08-03 23:02:36,713 INFO L125 PetriNetUnfolderBase]: For 3493/3493 co-relation queries the response was YES. [2023-08-03 23:02:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132075 conditions, 65428 events. 49312/65428 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 3405. Compared 435719 event pairs, 30214 based on Foata normal form. 36/61273 useless extension candidates. Maximal degree in co-relation 46817. Up to 61204 conditions per place. [2023-08-03 23:02:37,015 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 51 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-03 23:02:37,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 307 flow [2023-08-03 23:02:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:02:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:02:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 594 transitions. [2023-08-03 23:02:37,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846456692913385 [2023-08-03 23:02:37,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 594 transitions. [2023-08-03 23:02:37,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 594 transitions. [2023-08-03 23:02:37,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:37,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 594 transitions. [2023-08-03 23:02:37,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:37,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:37,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:37,019 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 169 flow. Second operand 4 states and 594 transitions. [2023-08-03 23:02:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 307 flow [2023-08-03 23:02:37,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 302 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:02:37,021 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 162 flow [2023-08-03 23:02:37,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2023-08-03 23:02:37,022 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 23:02:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 162 flow [2023-08-03 23:02:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:37,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:37,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:37,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 23:02:37,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:02:37,226 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:02:37,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2047353111, now seen corresponding path program 1 times [2023-08-03 23:02:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:37,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525918482] [2023-08-03 23:02:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:02:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525918482] [2023-08-03 23:02:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525918482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:02:37,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:02:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:02:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098430431] [2023-08-03 23:02:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:02:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:02:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:02:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:02:37,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 254 [2023-08-03 23:02:37,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:37,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:37,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 254 [2023-08-03 23:02:37,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:02:39,854 INFO L124 PetriNetUnfolderBase]: 25984/35665 cut-off events. [2023-08-03 23:02:39,854 INFO L125 PetriNetUnfolderBase]: For 2458/2458 co-relation queries the response was YES. [2023-08-03 23:02:39,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 35665 events. 25984/35665 cut-off events. For 2458/2458 co-relation queries the response was YES. Maximal size of possible extension queue 1948. Compared 237696 event pairs, 952 based on Foata normal form. 5184/38815 useless extension candidates. Maximal degree in co-relation 26012. Up to 28224 conditions per place. [2023-08-03 23:02:39,931 INFO L140 encePairwiseOnDemand]: 252/254 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2023-08-03 23:02:39,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 330 flow [2023-08-03 23:02:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:02:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:02:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-03 23:02:39,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594488188976378 [2023-08-03 23:02:39,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-03 23:02:39,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-03 23:02:39,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:02:39,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-03 23:02:39,934 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 23:02:39,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:39,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:39,936 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 162 flow. Second operand 4 states and 604 transitions. [2023-08-03 23:02:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 330 flow [2023-08-03 23:02:40,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 323 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:02:40,088 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2023-08-03 23:02:40,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2023-08-03 23:02:40,089 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:02:40,089 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2023-08-03 23:02:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:40,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:02:40,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:02:40,089 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:02:40,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:02:40,089 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:02:40,090 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:02:40,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:02:40,164 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 23:02:40,164 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:02:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9840 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 23:02:40,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:02:40,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 161 transitions, 350 flow [2023-08-03 23:02:40,168 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:02:40,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 161 transitions, 350 flow [2023-08-03 23:02:40,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 161 transitions, 350 flow [2023-08-03 23:02:40,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 161 transitions, 350 flow [2023-08-03 23:02:40,240 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:02:40,240 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:02:40,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 1414 events. 93/1414 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9801 event pairs, 0 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-03 23:02:40,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 7088 [2023-08-03 23:02:42,987 INFO L134 LiptonReduction]: Checked pairs total: 23505 [2023-08-03 23:02:42,988 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-03 23:02:42,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:02:42,989 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;@2c608dd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:02:42,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:02:42,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:02:42,991 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-03 23:02:42,991 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 23:02:42,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:02:42,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:02:42,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:02:42,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:02:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1215164342, now seen corresponding path program 1 times [2023-08-03 23:02:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:02:42,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339807737] [2023-08-03 23:02:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:02:42,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:02:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:02:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:02:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:02:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339807737] [2023-08-03 23:02:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339807737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:02:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:02:43,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:02:43,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251968712] [2023-08-03 23:02:43,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:02:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:02:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:02:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:02:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:02:43,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 285 [2023-08-03 23:02:43,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:02:43,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:02:43,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 285 [2023-08-03 23:02:43,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:03:19,023 INFO L124 PetriNetUnfolderBase]: 378842/493505 cut-off events. [2023-08-03 23:03:19,023 INFO L125 PetriNetUnfolderBase]: For 5709/5709 co-relation queries the response was YES. [2023-08-03 23:03:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977668 conditions, 493505 events. 378842/493505 cut-off events. For 5709/5709 co-relation queries the response was YES. Maximal size of possible extension queue 18710. Compared 3681668 event pairs, 313476 based on Foata normal form. 10836/438846 useless extension candidates. Maximal degree in co-relation 282305. Up to 476892 conditions per place. [2023-08-03 23:03:21,638 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 43 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 23:03:21,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 236 flow [2023-08-03 23:03:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:03:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:03:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-03 23:03:21,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321637426900585 [2023-08-03 23:03:21,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-03 23:03:21,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-03 23:03:21,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:03:21,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-03 23:03:21,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:03:21,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:03:21,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:03:21,656 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 140 flow. Second operand 3 states and 455 transitions. [2023-08-03 23:03:21,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 236 flow [2023-08-03 23:03:21,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 59 transitions, 234 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:03:21,662 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 148 flow [2023-08-03 23:03:21,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2023-08-03 23:03:21,663 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-03 23:03:21,663 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 148 flow [2023-08-03 23:03:21,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:03:21,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:03:21,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:03:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:03:21,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:03:21,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:03:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1821339440, now seen corresponding path program 1 times [2023-08-03 23:03:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:03:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158019963] [2023-08-03 23:03:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:03:21,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:03:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:03:21,727 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 23:03:21,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:03:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158019963] [2023-08-03 23:03:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158019963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:03:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533771497] [2023-08-03 23:03:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:03:21,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:03:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:03:21,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:03:21,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:03:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:03:21,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:03:21,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:03:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:03:21,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:03:21,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533771497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:03:21,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:03:21,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:03:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442760757] [2023-08-03 23:03:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:03:21,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:03:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:03:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:03:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:03:21,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 285 [2023-08-03 23:03:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:03:21,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:03:21,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 285 [2023-08-03 23:03:21,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand