/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_safe005_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:12:12,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:12:12,175 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:12:12,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:12:12,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:12:12,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:12:12,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:12:12,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:12:12,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:12:12,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:12:12,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:12:12,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:12:12,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:12:12,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:12:12,224 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:12:12,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:12:12,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:12:12,224 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:12:12,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:12:12,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:12:12,225 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:12:12,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:12:12,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:12:12,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:12:12,227 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:12:12,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:12:12,227 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:12:12,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:12:12,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:12:12,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:12:12,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:12:12,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:12:12,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:12:12,230 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:12:12,231 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:12:12,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:12:12,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:12:12,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:12:12,478 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:12:12,478 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:12:12,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe005_tso_bound2.i [2023-08-04 00:12:13,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:12:13,893 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:12:13,893 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe005_tso_bound2.i [2023-08-04 00:12:13,908 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12fcd1927/8dfccec077314b59807febec96e5ab7c/FLAG70a16eec0 [2023-08-04 00:12:13,922 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12fcd1927/8dfccec077314b59807febec96e5ab7c [2023-08-04 00:12:13,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:12:13,925 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:12:13,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:12:13,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:12:13,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:12:13,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:12:13" (1/1) ... [2023-08-04 00:12:13,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2b6b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:13, skipping insertion in model container [2023-08-04 00:12:13,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:12:13" (1/1) ... [2023-08-04 00:12:13,983 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:12:14,114 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_safe005_tso_bound2.i[945,958] [2023-08-04 00:12:14,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:12:14,302 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:12:14,315 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_safe005_tso_bound2.i[945,958] [2023-08-04 00:12:14,337 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:12:14,340 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:12:14,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:12:14,392 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:12:14,393 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:12:14,398 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:12:14,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14 WrapperNode [2023-08-04 00:12:14,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:12:14,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:12:14,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:12:14,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:12:14,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,438 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-04 00:12:14,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:12:14,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:12:14,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:12:14,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:12:14,450 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:12:14,470 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:12:14,470 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:12:14,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:12:14,471 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (1/1) ... [2023-08-04 00:12:14,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:12:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:14,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:12:14,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:12:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:12:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:12:14,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:12:14,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:12:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:12:14,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:12:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:12:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:12:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:12:14,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:12:14,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:12:14,658 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:12:14,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:12:14,818 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:12:14,824 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:12:14,825 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:12:14,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:12:14 BoogieIcfgContainer [2023-08-04 00:12:14,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:12:14,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:12:14,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:12:14,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:12:14,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:12:13" (1/3) ... [2023-08-04 00:12:14,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b498bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:12:14, skipping insertion in model container [2023-08-04 00:12:14,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:12:14" (2/3) ... [2023-08-04 00:12:14,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b498bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:12:14, skipping insertion in model container [2023-08-04 00:12:14,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:12:14" (3/3) ... [2023-08-04 00:12:14,835 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe005_tso_bound2.i [2023-08-04 00:12:14,841 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:12:14,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:12:14,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:12:14,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:12:14,893 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:12:14,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 00:12:15,033 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 00:12:15,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:12:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1853 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-04 00:12:15,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 00:12:15,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 78 transitions, 171 flow [2023-08-04 00:12:15,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:12:15,055 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 00:12:15,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 00:12:15,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 78 transitions, 171 flow [2023-08-04 00:12:15,084 INFO L124 PetriNetUnfolderBase]: 6/190 cut-off events. [2023-08-04 00:12:15,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:12:15,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 6/190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-04 00:12:15,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 00:12:16,822 INFO L134 LiptonReduction]: Checked pairs total: 2132 [2023-08-04 00:12:16,822 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 00:12:16,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:12:16,838 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;@25a60fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:12:16,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:12:16,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:12:16,842 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:12:16,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:12:16,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:16,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:12:16,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:16,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1984253370, now seen corresponding path program 1 times [2023-08-04 00:12:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069488395] [2023-08-04 00:12:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:12:16,977 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:12:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:12:17,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:12:17,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:12:17,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:12:17,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:12:17,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:12:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:12:17,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:12:17,041 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:12:17,042 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:12:17,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:12:17,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:12:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:12:17,250 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 00:12:17,251 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:12:17,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8886 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-04 00:12:17,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:12:17,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 99 transitions, 234 flow [2023-08-04 00:12:17,266 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:12:17,266 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-04 00:12:17,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-04 00:12:17,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 99 transitions, 234 flow [2023-08-04 00:12:17,320 INFO L124 PetriNetUnfolderBase]: 12/548 cut-off events. [2023-08-04 00:12:17,321 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:12:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 548 events. 12/548 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2784 event pairs, 0 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 441. Up to 27 conditions per place. [2023-08-04 00:12:17,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 2988 [2023-08-04 00:12:19,008 INFO L134 LiptonReduction]: Checked pairs total: 6582 [2023-08-04 00:12:19,009 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-04 00:12:19,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:12:19,011 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;@25a60fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:12:19,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:12:19,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:12:19,018 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-08-04 00:12:19,018 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:12:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:19,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:19,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:19,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1323892661, now seen corresponding path program 1 times [2023-08-04 00:12:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670603545] [2023-08-04 00:12:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:12:19,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670603545] [2023-08-04 00:12:19,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670603545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:19,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:12:19,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:12:19,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73913412] [2023-08-04 00:12:19,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:19,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:12:19,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:12:19,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:19,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:19,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:12:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:20,969 INFO L124 PetriNetUnfolderBase]: 12844/19670 cut-off events. [2023-08-04 00:12:20,969 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2023-08-04 00:12:21,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39357 conditions, 19670 events. 12844/19670 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 138161 event pairs, 9918 based on Foata normal form. 0/19438 useless extension candidates. Maximal degree in co-relation 11953. Up to 17234 conditions per place. [2023-08-04 00:12:21,106 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 28 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:12:21,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 180 flow [2023-08-04 00:12:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:12:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:12:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-04 00:12:21,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6286701208981001 [2023-08-04 00:12:21,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-04 00:12:21,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-04 00:12:21,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:21,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-04 00:12:21,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:21,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:21,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:21,144 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 364 transitions. [2023-08-04 00:12:21,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 180 flow [2023-08-04 00:12:21,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:12:21,155 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-04 00:12:21,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:12:21,161 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:12:21,162 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-04 00:12:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:21,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:12:21,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:12:21,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:21,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1383190586, now seen corresponding path program 1 times [2023-08-04 00:12:21,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:21,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296506778] [2023-08-04 00:12:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:12:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:21,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296506778] [2023-08-04 00:12:21,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296506778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:21,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759628743] [2023-08-04 00:12:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:21,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:21,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:21,278 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) [2023-08-04 00:12:21,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:12:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:21,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:12:21,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:12:21,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:21,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759628743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:21,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:12:21,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17707153] [2023-08-04 00:12:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:21,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:12:21,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:12:21,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:21,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:21,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:12:21,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:23,023 INFO L124 PetriNetUnfolderBase]: 12832/19625 cut-off events. [2023-08-04 00:12:23,023 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2023-08-04 00:12:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39027 conditions, 19625 events. 12832/19625 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 137206 event pairs, 7728 based on Foata normal form. 9/19453 useless extension candidates. Maximal degree in co-relation 13971. Up to 17187 conditions per place. [2023-08-04 00:12:23,135 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 00:12:23,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 202 flow [2023-08-04 00:12:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:12:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:12:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-08-04 00:12:23,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072538860103627 [2023-08-04 00:12:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-08-04 00:12:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-08-04 00:12:23,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:23,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-08-04 00:12:23,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:23,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:23,143 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:23,143 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 586 transitions. [2023-08-04 00:12:23,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 202 flow [2023-08-04 00:12:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:12:23,145 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-04 00:12:23,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2023-08-04 00:12:23,146 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 00:12:23,146 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-04 00:12:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:23,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:23,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:23,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:23,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:23,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1365437324, now seen corresponding path program 1 times [2023-08-04 00:12:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:23,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142270958] [2023-08-04 00:12:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:12:23,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:23,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142270958] [2023-08-04 00:12:23,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142270958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:23,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832036362] [2023-08-04 00:12:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:23,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:23,458 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) [2023-08-04 00:12:23,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:12:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:23,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:12:23,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:12:23,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832036362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:23,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:23,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:12:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302308678] [2023-08-04 00:12:23,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:23,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:12:23,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:23,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:23,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:12:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:24,836 INFO L124 PetriNetUnfolderBase]: 12242/18740 cut-off events. [2023-08-04 00:12:24,836 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2023-08-04 00:12:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37339 conditions, 18740 events. 12242/18740 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 130963 event pairs, 9508 based on Foata normal form. 0/18523 useless extension candidates. Maximal degree in co-relation 11408. Up to 16198 conditions per place. [2023-08-04 00:12:24,921 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-04 00:12:24,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 220 flow [2023-08-04 00:12:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:12:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:12:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 00:12:24,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355785837651122 [2023-08-04 00:12:24,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 00:12:24,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 00:12:24,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:24,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 00:12:24,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:24,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:24,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:24,925 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 368 transitions. [2023-08-04 00:12:24,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 220 flow [2023-08-04 00:12:24,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 213 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:12:24,928 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-04 00:12:24,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-04 00:12:24,933 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:12:24,933 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-04 00:12:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:24,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:24,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:24,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:25,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 00:12:25,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:25,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2147287057, now seen corresponding path program 1 times [2023-08-04 00:12:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:25,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391770300] [2023-08-04 00:12:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:12:25,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391770300] [2023-08-04 00:12:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391770300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099959922] [2023-08-04 00:12:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:25,227 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) [2023-08-04 00:12:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:12:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:25,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:12:25,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:12:25,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:12:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:12:25,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099959922] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:12:25,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:12:25,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:12:25,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241114570] [2023-08-04 00:12:25,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:12:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:25,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:12:25,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:25,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:25,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:12:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:26,290 INFO L124 PetriNetUnfolderBase]: 9694/14591 cut-off events. [2023-08-04 00:12:26,290 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-04 00:12:26,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29316 conditions, 14591 events. 9694/14591 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 95558 event pairs, 5616 based on Foata normal form. 3/14512 useless extension candidates. Maximal degree in co-relation 10429. Up to 12736 conditions per place. [2023-08-04 00:12:26,369 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 00:12:26,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 217 flow [2023-08-04 00:12:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 00:12:26,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152849740932642 [2023-08-04 00:12:26,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 00:12:26,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 00:12:26,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:26,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 00:12:26,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:26,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:26,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:26,379 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 475 transitions. [2023-08-04 00:12:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 217 flow [2023-08-04 00:12:26,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:12:26,383 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-04 00:12:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 00:12:26,384 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:12:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-04 00:12:26,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:26,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:26,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:26,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:26,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:26,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1628040401, now seen corresponding path program 1 times [2023-08-04 00:12:26,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409602619] [2023-08-04 00:12:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:12:26,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409602619] [2023-08-04 00:12:26,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409602619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:26,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96832347] [2023-08-04 00:12:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:26,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:26,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:26,678 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) [2023-08-04 00:12:26,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:12:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:26,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:12:26,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:12:26,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:26,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96832347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:26,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:26,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:12:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089439659] [2023-08-04 00:12:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:26,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:26,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:12:26,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:12:26,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:26,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:26,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:12:26,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:27,673 INFO L124 PetriNetUnfolderBase]: 9478/14173 cut-off events. [2023-08-04 00:12:27,673 INFO L125 PetriNetUnfolderBase]: For 1006/1006 co-relation queries the response was YES. [2023-08-04 00:12:27,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28560 conditions, 14173 events. 9478/14173 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 92069 event pairs, 2182 based on Foata normal form. 81/14253 useless extension candidates. Maximal degree in co-relation 10157. Up to 11907 conditions per place. [2023-08-04 00:12:27,748 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-04 00:12:27,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 269 flow [2023-08-04 00:12:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:12:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:12:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-08-04 00:12:27,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196891191709845 [2023-08-04 00:12:27,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-08-04 00:12:27,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-08-04 00:12:27,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:27,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-08-04 00:12:27,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:27,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:27,754 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:27,754 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 598 transitions. [2023-08-04 00:12:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 269 flow [2023-08-04 00:12:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:12:27,757 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-04 00:12:27,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-04 00:12:27,757 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 00:12:27,758 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-04 00:12:27,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:27,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:27,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:27,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:27,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:27,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:27,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 972809577, now seen corresponding path program 1 times [2023-08-04 00:12:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:27,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142511219] [2023-08-04 00:12:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:12:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142511219] [2023-08-04 00:12:28,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142511219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595246178] [2023-08-04 00:12:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:28,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:28,034 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) [2023-08-04 00:12:28,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:12:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:28,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:12:28,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:12:28,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:12:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:12:28,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595246178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:12:28,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:12:28,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:12:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130999880] [2023-08-04 00:12:28,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:12:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:28,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:12:28,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:28,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:12:28,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:28,723 INFO L124 PetriNetUnfolderBase]: 7588/11203 cut-off events. [2023-08-04 00:12:28,723 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2023-08-04 00:12:28,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22923 conditions, 11203 events. 7588/11203 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 69021 event pairs, 4450 based on Foata normal form. 27/11229 useless extension candidates. Maximal degree in co-relation 8129. Up to 9394 conditions per place. [2023-08-04 00:12:28,789 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 40 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:12:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 255 flow [2023-08-04 00:12:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 00:12:28,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256476683937824 [2023-08-04 00:12:28,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 00:12:28,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 00:12:28,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:28,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 00:12:28,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:28,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:28,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:28,794 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 483 transitions. [2023-08-04 00:12:28,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 255 flow [2023-08-04 00:12:28,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 250 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:12:28,796 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-04 00:12:28,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-04 00:12:28,797 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:12:28,797 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-04 00:12:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:28,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:28,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:28,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:29,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:12:29,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1227676927, now seen corresponding path program 1 times [2023-08-04 00:12:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:29,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694853012] [2023-08-04 00:12:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:12:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:29,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694853012] [2023-08-04 00:12:29,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694853012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:29,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537571778] [2023-08-04 00:12:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:29,090 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) [2023-08-04 00:12:29,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:12:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:29,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:12:29,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:12:29,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537571778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:29,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:29,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:12:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251215191] [2023-08-04 00:12:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:29,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:12:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:12:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:29,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:12:29,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:29,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:29,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:12:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:29,650 INFO L124 PetriNetUnfolderBase]: 4672/7036 cut-off events. [2023-08-04 00:12:29,651 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-08-04 00:12:29,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 7036 events. 4672/7036 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40817 event pairs, 568 based on Foata normal form. 729/7764 useless extension candidates. Maximal degree in co-relation 7349. Up to 4212 conditions per place. [2023-08-04 00:12:29,667 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-04 00:12:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-04 00:12:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-04 00:12:29,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.633419689119171 [2023-08-04 00:12:29,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-04 00:12:29,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-04 00:12:29,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:29,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-04 00:12:29,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:29,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:29,673 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:29,673 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 489 transitions. [2023-08-04 00:12:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-04 00:12:29,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:12:29,691 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-04 00:12:29,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-04 00:12:29,692 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:12:29,692 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-04 00:12:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:29,692 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:12:29,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:12:29,693 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:12:29,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:29,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:29,894 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:29,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:12:29,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:12:29,987 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 00:12:29,987 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:12:29,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8886 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-04 00:12:29,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:12:29,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 112 transitions, 248 flow [2023-08-04 00:12:29,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:12:29,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 00:12:29,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 00:12:29,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 112 transitions, 248 flow [2023-08-04 00:12:30,040 INFO L124 PetriNetUnfolderBase]: 66/967 cut-off events. [2023-08-04 00:12:30,040 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:12:30,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 967 events. 66/967 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6003 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 717. Up to 54 conditions per place. [2023-08-04 00:12:30,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 00:12:31,617 INFO L134 LiptonReduction]: Checked pairs total: 7901 [2023-08-04 00:12:31,617 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-04 00:12:31,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:12:31,619 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;@25a60fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:12:31,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:12:31,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:12:31,621 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-04 00:12:31,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:12:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 00:12:31,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:31,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 20121793, now seen corresponding path program 1 times [2023-08-04 00:12:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885291932] [2023-08-04 00:12:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:12:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885291932] [2023-08-04 00:12:31,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885291932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:31,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:12:31,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:12:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167748057] [2023-08-04 00:12:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:12:31,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:12:31,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:31,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:31,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:12:31,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:34,315 INFO L124 PetriNetUnfolderBase]: 33046/48143 cut-off events. [2023-08-04 00:12:34,315 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 00:12:34,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 48143 events. 33046/48143 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 340544 event pairs, 26064 based on Foata normal form. 0/45325 useless extension candidates. Maximal degree in co-relation 26602. Up to 43520 conditions per place. [2023-08-04 00:12:34,873 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:12:34,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 00:12:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:12:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:12:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 00:12:34,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869218500797448 [2023-08-04 00:12:34,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 00:12:34,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 00:12:34,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:34,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 00:12:34,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:34,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:34,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:34,878 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 368 transitions. [2023-08-04 00:12:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 00:12:34,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:12:34,880 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 00:12:34,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:12:34,882 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:12:34,883 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 00:12:34,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:34,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:34,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:34,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:12:34,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:34,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1647622516, now seen corresponding path program 1 times [2023-08-04 00:12:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:34,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988693040] [2023-08-04 00:12:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:12:34,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:34,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988693040] [2023-08-04 00:12:34,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988693040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:34,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227333538] [2023-08-04 00:12:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:34,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:34,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:34,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:12:34,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:12:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:35,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:12:35,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:12:35,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227333538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:35,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:35,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:12:35,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361714403] [2023-08-04 00:12:35,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:35,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:35,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:35,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:35,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:35,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:12:35,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:35,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:35,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:12:35,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:37,639 INFO L124 PetriNetUnfolderBase]: 31406/45017 cut-off events. [2023-08-04 00:12:37,639 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 00:12:37,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87898 conditions, 45017 events. 31406/45017 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 310544 event pairs, 24928 based on Foata normal form. 0/42784 useless extension candidates. Maximal degree in co-relation 87861. Up to 40987 conditions per place. [2023-08-04 00:12:37,822 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:12:37,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 00:12:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:12:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:12:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:12:37,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917065390749602 [2023-08-04 00:12:37,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:12:37,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:12:37,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:37,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:12:37,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:37,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:37,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:37,829 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:12:37,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 00:12:37,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:12:37,833 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 00:12:37,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 00:12:37,833 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 00:12:37,833 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 00:12:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:37,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:37,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:37,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:38,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:38,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:38,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -622613019, now seen corresponding path program 1 times [2023-08-04 00:12:38,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:38,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340042400] [2023-08-04 00:12:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:38,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:12:38,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:38,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340042400] [2023-08-04 00:12:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340042400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:38,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440553509] [2023-08-04 00:12:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:38,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:38,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:38,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:12:38,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:12:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:38,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:12:38,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:12:38,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:12:38,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440553509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:38,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:12:38,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:12:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256727219] [2023-08-04 00:12:38,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:38,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:12:38,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:38,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:38,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:12:38,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:40,638 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 00:12:40,638 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 00:12:40,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290619 event pairs, 23582 based on Foata normal form. 0/41626 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 00:12:40,816 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 00:12:40,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 00:12:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:12:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:12:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 00:12:40,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980861244019139 [2023-08-04 00:12:40,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 00:12:40,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 00:12:40,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:40,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 00:12:40,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:40,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:40,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:40,820 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 375 transitions. [2023-08-04 00:12:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 00:12:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:12:40,823 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 00:12:40,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-04 00:12:40,823 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:12:40,823 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 00:12:40,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:40,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:40,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:40,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 00:12:41,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:41,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 530500471, now seen corresponding path program 1 times [2023-08-04 00:12:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198987261] [2023-08-04 00:12:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:12:41,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:41,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198987261] [2023-08-04 00:12:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198987261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886451302] [2023-08-04 00:12:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:41,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:41,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:12:41,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:12:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:41,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:12:41,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:12:41,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:12:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:12:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886451302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:12:41,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:12:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:12:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257250224] [2023-08-04 00:12:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:12:41,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:41,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:41,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 209 [2023-08-04 00:12:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:41,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:41,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 209 [2023-08-04 00:12:41,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:43,184 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 00:12:43,185 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 00:12:43,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 213857 event pairs, 14820 based on Foata normal form. 3/33868 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 00:12:43,500 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 00:12:43,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 00:12:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 00:12:43,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729665071770335 [2023-08-04 00:12:43,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 00:12:43,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 00:12:43,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:43,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 00:12:43,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:43,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:43,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:43,504 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 479 transitions. [2023-08-04 00:12:43,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 00:12:43,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:12:43,509 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 00:12:43,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 00:12:43,509 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:12:43,509 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 00:12:43,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:43,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:43,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:43,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:43,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:43,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash -42188384, now seen corresponding path program 1 times [2023-08-04 00:12:43,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362273415] [2023-08-04 00:12:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:12:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362273415] [2023-08-04 00:12:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362273415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950507986] [2023-08-04 00:12:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:43,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:43,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:43,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:12:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:12:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:43,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:12:43,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:12:43,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:12:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:12:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950507986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:12:43,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:12:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:12:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784392305] [2023-08-04 00:12:43,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:12:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:43,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 209 [2023-08-04 00:12:43,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:43,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:43,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 209 [2023-08-04 00:12:43,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:45,422 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 00:12:45,423 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 00:12:45,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160015 event pairs, 11902 based on Foata normal form. 27/26511 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 00:12:45,555 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 00:12:45,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 00:12:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 00:12:45,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825358851674641 [2023-08-04 00:12:45,557 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 00:12:45,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 00:12:45,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:45,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 00:12:45,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:45,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:45,560 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:45,561 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 487 transitions. [2023-08-04 00:12:45,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 00:12:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:12:45,567 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 00:12:45,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 00:12:45,567 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 00:12:45,568 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 00:12:45,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:45,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:45,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:45,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:12:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:12:45,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:45,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -754161232, now seen corresponding path program 1 times [2023-08-04 00:12:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535491050] [2023-08-04 00:12:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:12:45,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:45,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535491050] [2023-08-04 00:12:45,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535491050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:12:45,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749933162] [2023-08-04 00:12:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:12:45,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:12:45,832 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:12:45,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:12:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:12:45,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:12:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:12:45,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:12:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:12:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749933162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:12:45,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:12:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:12:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73962957] [2023-08-04 00:12:45,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:12:45,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:12:45,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:12:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:12:45,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 209 [2023-08-04 00:12:45,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:45,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:45,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 209 [2023-08-04 00:12:45,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:47,389 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 00:12:47,389 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 00:12:47,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 127849 event pairs, 6886 based on Foata normal form. 243/23451 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 00:12:47,488 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 00:12:47,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 00:12:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:12:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:12:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-04 00:12:47,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2023-08-04 00:12:47,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-04 00:12:47,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-04 00:12:47,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:12:47,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-04 00:12:47,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:47,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:47,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:47,493 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 495 transitions. [2023-08-04 00:12:47,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 00:12:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:12:47,497 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 00:12:47,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-04 00:12:47,497 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 00:12:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 00:12:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:12:47,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:12:47,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 00:12:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:12:47,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:12:47,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:12:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 439140675, now seen corresponding path program 1 times [2023-08-04 00:12:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:12:47,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352626185] [2023-08-04 00:12:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:12:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:12:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:12:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:12:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:12:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352626185] [2023-08-04 00:12:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352626185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:12:47,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:12:47,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:12:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887728227] [2023-08-04 00:12:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:12:47,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:12:47,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:12:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:12:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:12:47,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 209 [2023-08-04 00:12:47,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:12:47,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:12:47,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 209 [2023-08-04 00:12:47,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:12:59,202 INFO L124 PetriNetUnfolderBase]: 155311/195632 cut-off events. [2023-08-04 00:12:59,202 INFO L125 PetriNetUnfolderBase]: For 92505/92505 co-relation queries the response was YES. [2023-08-04 00:12:59,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445649 conditions, 195632 events. 155311/195632 cut-off events. For 92505/92505 co-relation queries the response was YES. Maximal size of possible extension queue 5354. Compared 1089817 event pairs, 63286 based on Foata normal form. 4036/199583 useless extension candidates. Maximal degree in co-relation 445558. Up to 103147 conditions per place. [2023-08-04 00:13:00,449 INFO L140 encePairwiseOnDemand]: 197/209 looper letters, 62 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-08-04 00:13:00,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 444 flow [2023-08-04 00:13:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:13:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:13:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:13:00,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917065390749602 [2023-08-04 00:13:00,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:13:00,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:13:00,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:13:00,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:13:00,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:00,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:00,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:00,453 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:13:00,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 444 flow [2023-08-04 00:13:00,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 430 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:13:00,805 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 237 flow [2023-08-04 00:13:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-08-04 00:13:00,806 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 00:13:00,806 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 237 flow [2023-08-04 00:13:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:13:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:13:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 00:13:00,807 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:13:00,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:13:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 728458385, now seen corresponding path program 1 times [2023-08-04 00:13:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:13:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730667531] [2023-08-04 00:13:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:13:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:13:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:13:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:13:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:13:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730667531] [2023-08-04 00:13:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730667531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:13:00,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:13:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:13:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196262225] [2023-08-04 00:13:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:13:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:13:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:13:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:13:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:13:00,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 209 [2023-08-04 00:13:00,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:00,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:13:00,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 209 [2023-08-04 00:13:00,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:13:11,688 INFO L124 PetriNetUnfolderBase]: 146051/184558 cut-off events. [2023-08-04 00:13:11,689 INFO L125 PetriNetUnfolderBase]: For 148772/148772 co-relation queries the response was YES. [2023-08-04 00:13:12,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535823 conditions, 184558 events. 146051/184558 cut-off events. For 148772/148772 co-relation queries the response was YES. Maximal size of possible extension queue 4870. Compared 1024359 event pairs, 30565 based on Foata normal form. 960/185518 useless extension candidates. Maximal degree in co-relation 224014. Up to 72568 conditions per place. [2023-08-04 00:13:12,960 INFO L140 encePairwiseOnDemand]: 197/209 looper letters, 77 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2023-08-04 00:13:12,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 95 transitions, 603 flow [2023-08-04 00:13:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:13:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:13:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-04 00:13:12,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765550239234449 [2023-08-04 00:13:12,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-04 00:13:12,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-04 00:13:12,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:13:12,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-04 00:13:12,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:12,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:12,964 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:12,965 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 237 flow. Second operand 4 states and 482 transitions. [2023-08-04 00:13:12,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 95 transitions, 603 flow [2023-08-04 00:13:13,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 561 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:13:13,424 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 345 flow [2023-08-04 00:13:13,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-08-04 00:13:13,424 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-04 00:13:13,424 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 345 flow [2023-08-04 00:13:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:13:13,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:13:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:13:13,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:13:13,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:13:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -462586765, now seen corresponding path program 1 times [2023-08-04 00:13:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:13:13,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997278390] [2023-08-04 00:13:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:13:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:13:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:13:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:13:13,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:13:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997278390] [2023-08-04 00:13:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997278390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:13:13,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:13:13,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:13:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092493472] [2023-08-04 00:13:13,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:13:13,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:13:13,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:13:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:13:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:13:13,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 209 [2023-08-04 00:13:13,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:13,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:13:13,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 209 [2023-08-04 00:13:13,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:13:30,048 INFO L124 PetriNetUnfolderBase]: 192103/246730 cut-off events. [2023-08-04 00:13:30,048 INFO L125 PetriNetUnfolderBase]: For 316829/318709 co-relation queries the response was YES. [2023-08-04 00:13:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762129 conditions, 246730 events. 192103/246730 cut-off events. For 316829/318709 co-relation queries the response was YES. Maximal size of possible extension queue 8140. Compared 1550452 event pairs, 31868 based on Foata normal form. 3984/247938 useless extension candidates. Maximal degree in co-relation 762039. Up to 120175 conditions per place. [2023-08-04 00:13:31,661 INFO L140 encePairwiseOnDemand]: 201/209 looper letters, 99 selfloop transitions, 15 changer transitions 2/125 dead transitions. [2023-08-04 00:13:31,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 897 flow [2023-08-04 00:13:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:13:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:13:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 00:13:31,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076555023923444 [2023-08-04 00:13:31,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 00:13:31,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 00:13:31,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:13:31,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 00:13:31,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:31,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:31,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:31,666 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 345 flow. Second operand 4 states and 508 transitions. [2023-08-04 00:13:31,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 897 flow [2023-08-04 00:13:33,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 125 transitions, 897 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:13:33,916 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 502 flow [2023-08-04 00:13:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=502, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-08-04 00:13:33,916 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 25 predicate places. [2023-08-04 00:13:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 502 flow [2023-08-04 00:13:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:13:33,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:13:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:13:33,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:13:33,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:13:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1451815084, now seen corresponding path program 1 times [2023-08-04 00:13:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:13:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354541642] [2023-08-04 00:13:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:13:33,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:13:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:13:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:13:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:13:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354541642] [2023-08-04 00:13:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354541642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:13:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:13:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:13:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265339839] [2023-08-04 00:13:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:13:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:13:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:13:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:13:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:13:34,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 209 [2023-08-04 00:13:34,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 502 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:13:34,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:13:34,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 209 [2023-08-04 00:13:34,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:14:14,306 INFO L124 PetriNetUnfolderBase]: 414267/524145 cut-off events. [2023-08-04 00:14:14,306 INFO L125 PetriNetUnfolderBase]: For 837336/837336 co-relation queries the response was YES. [2023-08-04 00:14:16,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745033 conditions, 524145 events. 414267/524145 cut-off events. For 837336/837336 co-relation queries the response was YES. Maximal size of possible extension queue 17632. Compared 3373633 event pairs, 68524 based on Foata normal form. 4464/528533 useless extension candidates. Maximal degree in co-relation 1744918. Up to 121545 conditions per place. [2023-08-04 00:14:17,659 INFO L140 encePairwiseOnDemand]: 197/209 looper letters, 162 selfloop transitions, 74 changer transitions 10/249 dead transitions. [2023-08-04 00:14:17,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 249 transitions, 1990 flow [2023-08-04 00:14:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 00:14:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 00:14:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 871 transitions. [2023-08-04 00:14:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595352016404648 [2023-08-04 00:14:17,661 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 871 transitions. [2023-08-04 00:14:17,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 871 transitions. [2023-08-04 00:14:17,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:14:17,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 871 transitions. [2023-08-04 00:14:17,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.42857142857143) internal successors, (871), 7 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:14:17,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:14:17,666 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:14:17,666 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 502 flow. Second operand 7 states and 871 transitions. [2023-08-04 00:14:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 249 transitions, 1990 flow [2023-08-04 00:14:23,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 249 transitions, 1969 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:14:23,040 INFO L231 Difference]: Finished difference. Result has 87 places, 134 transitions, 1317 flow [2023-08-04 00:14:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=87, PETRI_TRANSITIONS=134} [2023-08-04 00:14:23,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2023-08-04 00:14:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 134 transitions, 1317 flow [2023-08-04 00:14:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:14:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:14:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:14:23,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:14:23,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:14:23,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:14:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1997969388, now seen corresponding path program 1 times [2023-08-04 00:14:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:14:23,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826291374] [2023-08-04 00:14:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:14:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:14:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:14:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:14:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:14:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826291374] [2023-08-04 00:14:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826291374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:14:23,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:14:23,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:14:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829470614] [2023-08-04 00:14:23,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:14:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:14:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:14:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:14:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:14:23,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 209 [2023-08-04 00:14:23,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 1317 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:14:23,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:14:23,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 209 [2023-08-04 00:14:23,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:15:16,593 INFO L124 PetriNetUnfolderBase]: 426735/542569 cut-off events. [2023-08-04 00:15:16,593 INFO L125 PetriNetUnfolderBase]: For 1889731/1889731 co-relation queries the response was YES. [2023-08-04 00:15:19,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127799 conditions, 542569 events. 426735/542569 cut-off events. For 1889731/1889731 co-relation queries the response was YES. Maximal size of possible extension queue 18312. Compared 3623505 event pairs, 87906 based on Foata normal form. 3456/545970 useless extension candidates. Maximal degree in co-relation 2127668. Up to 441231 conditions per place. [2023-08-04 00:15:20,197 INFO L140 encePairwiseOnDemand]: 195/209 looper letters, 162 selfloop transitions, 65 changer transitions 22/252 dead transitions. [2023-08-04 00:15:20,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 252 transitions, 2720 flow [2023-08-04 00:15:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:15:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:15:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-08-04 00:15:20,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5779904306220096 [2023-08-04 00:15:20,198 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-08-04 00:15:20,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-08-04 00:15:20,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:15:20,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-08-04 00:15:20,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 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) [2023-08-04 00:15:20,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:20,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:20,201 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 1317 flow. Second operand 5 states and 604 transitions. [2023-08-04 00:15:20,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 252 transitions, 2720 flow [2023-08-04 00:19:05,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 252 transitions, 2708 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-04 00:19:05,490 INFO L231 Difference]: Finished difference. Result has 95 places, 167 transitions, 1983 flow [2023-08-04 00:19:05,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1983, PETRI_PLACES=95, PETRI_TRANSITIONS=167} [2023-08-04 00:19:05,491 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-08-04 00:19:05,491 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 167 transitions, 1983 flow [2023-08-04 00:19:05,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:05,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:19:05,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:19:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 00:19:05,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:19:05,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:19:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2088151281, now seen corresponding path program 1 times [2023-08-04 00:19:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:19:05,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471902439] [2023-08-04 00:19:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:19:05,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:19:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:19:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:19:05,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:19:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471902439] [2023-08-04 00:19:05,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471902439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:19:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247002681] [2023-08-04 00:19:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:19:05,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:19:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:19:05,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:19:05,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:19:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:19:05,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 00:19:05,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:19:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:19:05,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:19:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:19:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247002681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:19:05,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:19:05,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-04 00:19:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085580307] [2023-08-04 00:19:05,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:19:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 00:19:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:19:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 00:19:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 00:19:05,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 209 [2023-08-04 00:19:05,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 167 transitions, 1983 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:05,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:19:05,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 209 [2023-08-04 00:19:05,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:20:24,327 INFO L124 PetriNetUnfolderBase]: 515853/684001 cut-off events. [2023-08-04 00:20:24,327 INFO L125 PetriNetUnfolderBase]: For 3647258/3687371 co-relation queries the response was YES. [2023-08-04 00:20:29,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3022792 conditions, 684001 events. 515853/684001 cut-off events. For 3647258/3687371 co-relation queries the response was YES. Maximal size of possible extension queue 29572. Compared 5347149 event pairs, 118860 based on Foata normal form. 5847/661263 useless extension candidates. Maximal degree in co-relation 3022661. Up to 310657 conditions per place. [2023-08-04 00:20:30,823 INFO L140 encePairwiseOnDemand]: 201/209 looper letters, 169 selfloop transitions, 35 changer transitions 6/269 dead transitions. [2023-08-04 00:20:30,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 269 transitions, 3403 flow [2023-08-04 00:20:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:20:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:20:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 00:20:30,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6004784688995215 [2023-08-04 00:20:30,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 00:20:30,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 00:20:30,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:20:30,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 00:20:30,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:30,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:30,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:30,828 INFO L175 Difference]: Start difference. First operand has 95 places, 167 transitions, 1983 flow. Second operand 4 states and 502 transitions. [2023-08-04 00:20:30,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 269 transitions, 3403 flow Received shutdown request... [2023-08-04 00:24:40,759 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 00:24:40,759 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 00:24:41,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 00:24:41,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown