/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_safe021_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:51:03,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:51:03,971 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:51:03,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:51:03,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:51:03,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:51:03,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:51:03,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:51:03,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:51:03,990 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:51:03,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:51:03,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:51:03,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:51:03,991 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:51:03,991 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:51:03,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:51:03,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:51:03,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:51:03,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:51:03,992 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:51:03,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:51:03,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:51:03,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:51:03,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:51:03,996 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:51:03,996 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:51:03,997 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:51:03,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:51:03,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:51:03,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:51:03,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:51:03,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:51:03,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:51:03,998 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:51:03,998 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:51:03,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:51:03,998 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:51:03,999 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:51:03,999 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:51:03,999 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:51:03,999 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:51:04,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:51:04,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:51:04,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:51:04,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:51:04,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:51:04,193 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:51:04,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe021_tso_bound2.i [2023-08-04 00:51:05,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:51:05,423 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:51:05,423 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe021_tso_bound2.i [2023-08-04 00:51:05,440 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d666b60/86d70bc4c521494190df41a4e1210e4b/FLAG29edc11d1 [2023-08-04 00:51:05,454 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d666b60/86d70bc4c521494190df41a4e1210e4b [2023-08-04 00:51:05,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:51:05,459 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:51:05,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:51:05,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:51:05,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:51:05,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b459d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05, skipping insertion in model container [2023-08-04 00:51:05,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,488 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:51:05,577 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_safe021_tso_bound2.i[945,958] [2023-08-04 00:51:05,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:51:05,718 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:51:05,727 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_safe021_tso_bound2.i[945,958] [2023-08-04 00:51:05,741 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:51:05,742 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:51:05,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:51:05,781 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:51:05,782 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:51:05,786 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:51:05,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05 WrapperNode [2023-08-04 00:51:05,787 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:51:05,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:51:05,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:51:05,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:51:05,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,832 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-04 00:51:05,832 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:51:05,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:51:05,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:51:05,833 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:51:05,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:51:05,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:51:05,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:51:05,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:51:05,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (1/1) ... [2023-08-04 00:51:05,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:51:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:05,894 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 00:51:05,900 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 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:51:05,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:51:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:51:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:51:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:51:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:51:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:51:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:51:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:51:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:51:05,918 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 00:51:06,020 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:51:06,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:51:06,191 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:51:06,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:51:06,196 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:51:06,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:51:06 BoogieIcfgContainer [2023-08-04 00:51:06,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:51:06,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:51:06,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:51:06,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:51:06,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:51:05" (1/3) ... [2023-08-04 00:51:06,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32afbf99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:51:06, skipping insertion in model container [2023-08-04 00:51:06,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:51:05" (2/3) ... [2023-08-04 00:51:06,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32afbf99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:51:06, skipping insertion in model container [2023-08-04 00:51:06,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:51:06" (3/3) ... [2023-08-04 00:51:06,203 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe021_tso_bound2.i [2023-08-04 00:51:06,209 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:51:06,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:51:06,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:51:06,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:51:06,258 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:51:06,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 00:51:06,393 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 00:51:06,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:06,397 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 1840 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 00:51:06,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 00:51:06,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 78 transitions, 171 flow [2023-08-04 00:51:06,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:06,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 00:51:06,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 00:51:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 78 transitions, 171 flow [2023-08-04 00:51:06,427 INFO L124 PetriNetUnfolderBase]: 6/190 cut-off events. [2023-08-04 00:51:06,427 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:06,427 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 585 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 00:51:06,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 00:51:07,714 INFO L134 LiptonReduction]: Checked pairs total: 2186 [2023-08-04 00:51:07,714 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 00:51:07,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:51:07,731 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;@194f75e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:07,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:51:07,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:07,752 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:51:07,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:07,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:07,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:51:07,754 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 00:51:07,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1961054369, now seen corresponding path program 1 times [2023-08-04 00:51:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:07,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549354200] [2023-08-04 00:51:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:07,973 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 00:51:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549354200] [2023-08-04 00:51:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549354200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882141367] [2023-08-04 00:51:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:07,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:07,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:08,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 166 [2023-08-04 00:51:08,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 00:51:08,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:08,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 166 [2023-08-04 00:51:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:08,100 INFO L124 PetriNetUnfolderBase]: 160/342 cut-off events. [2023-08-04 00:51:08,100 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 00:51:08,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 342 events. 160/342 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1558 event pairs, 118 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 661. Up to 284 conditions per place. [2023-08-04 00:51:08,106 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 18 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 00:51:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 00:51:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-04 00:51:08,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 00:51:08,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-04 00:51:08,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-04 00:51:08,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:08,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-04 00:51:08,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 00:51:08,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 00:51:08,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 00:51:08,135 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 300 transitions. [2023-08-04 00:51:08,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 00:51:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:51:08,138 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 00:51:08,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 00:51:08,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 00:51:08,142 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 00:51:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 00:51:08,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:08,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:51:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:51:08,143 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 00:51:08,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1958391992, now seen corresponding path program 1 times [2023-08-04 00:51:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:08,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912847383] [2023-08-04 00:51:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:51:08,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:51:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:51:08,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:51:08,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:51:08,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:51:08,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:51:08,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:51:08,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:51:08,184 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:51:08,186 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:51:08,186 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:51:08,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:51:08,202 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:51:08,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:51:08,326 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 00:51:08,326 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:08,331 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 34. Compared 8869 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 00:51:08,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:51:08,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 99 transitions, 234 flow [2023-08-04 00:51:08,333 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:08,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-04 00:51:08,334 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-04 00:51:08,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 99 transitions, 234 flow [2023-08-04 00:51:08,393 INFO L124 PetriNetUnfolderBase]: 12/548 cut-off events. [2023-08-04 00:51:08,394 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:08,395 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 2789 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 00:51:08,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 2988 [2023-08-04 00:51:09,824 INFO L134 LiptonReduction]: Checked pairs total: 6693 [2023-08-04 00:51:09,825 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-04 00:51:09,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:51:09,827 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;@194f75e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:09,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:51:09,832 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:09,832 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-08-04 00:51:09,832 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:51:09,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:09,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:09,832 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 00:51:09,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1320135254, now seen corresponding path program 1 times [2023-08-04 00:51:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118129665] [2023-08-04 00:51:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:09,866 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 00:51:09,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118129665] [2023-08-04 00:51:09,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118129665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:09,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:09,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:09,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645667671] [2023-08-04 00:51:09,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:09,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:09,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:51:09,876 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 00:51:09,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:09,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:51:09,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:11,202 INFO L124 PetriNetUnfolderBase]: 12844/19664 cut-off events. [2023-08-04 00:51:11,202 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2023-08-04 00:51:11,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39351 conditions, 19664 events. 12844/19664 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 137645 event pairs, 9918 based on Foata normal form. 0/19454 useless extension candidates. Maximal degree in co-relation 11947. Up to 17234 conditions per place. [2023-08-04 00:51:11,331 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 28 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:51:11,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 180 flow [2023-08-04 00:51:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-04 00:51:11,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6286701208981001 [2023-08-04 00:51:11,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-04 00:51:11,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-04 00:51:11,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:11,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-04 00:51:11,342 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 00:51:11,344 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 00:51:11,345 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 00:51:11,345 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 364 transitions. [2023-08-04 00:51:11,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 180 flow [2023-08-04 00:51:11,350 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 00:51:11,351 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-04 00:51:11,351 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 00:51:11,352 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:51:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-04 00:51:11,352 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 00:51:11,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:11,352 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:51:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:51:11,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:11,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1559012874, now seen corresponding path program 1 times [2023-08-04 00:51:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620616836] [2023-08-04 00:51:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:11,439 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 00:51:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620616836] [2023-08-04 00:51:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620616836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126522766] [2023-08-04 00:51:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:11,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:11,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:11,447 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 00:51:11,509 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 00:51:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:11,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:51:11,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:11,591 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 00:51:11,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126522766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:11,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:51:11,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021137824] [2023-08-04 00:51:11,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:11,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:51:11,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:51:11,616 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 00:51:11,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:11,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:51:11,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:12,815 INFO L124 PetriNetUnfolderBase]: 12832/19625 cut-off events. [2023-08-04 00:51:12,815 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2023-08-04 00:51:12,858 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 771. Compared 137323 event pairs, 7728 based on Foata normal form. 9/19442 useless extension candidates. Maximal degree in co-relation 13971. Up to 17187 conditions per place. [2023-08-04 00:51:12,907 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 00:51:12,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 202 flow [2023-08-04 00:51:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:51:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:51:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-08-04 00:51:12,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072538860103627 [2023-08-04 00:51:12,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-08-04 00:51:12,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-08-04 00:51:12,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:12,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-08-04 00:51:12,910 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 00:51:12,911 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 00:51:12,912 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 00:51:12,912 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 586 transitions. [2023-08-04 00:51:12,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 202 flow [2023-08-04 00:51:12,912 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 00:51:12,913 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-04 00:51:12,913 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 00:51:12,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 00:51:12,914 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-04 00:51:12,914 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 00:51:12,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:12,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:12,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:51:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:13,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:13,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1960217662, now seen corresponding path program 1 times [2023-08-04 00:51:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:13,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598441421] [2023-08-04 00:51:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:13,158 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 00:51:13,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:13,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598441421] [2023-08-04 00:51:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598441421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:13,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738862842] [2023-08-04 00:51:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:13,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:13,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:13,175 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 00:51:13,176 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 00:51:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:13,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:51:13,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:13,266 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 00:51:13,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:13,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738862842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:13,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:13,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:51:13,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822962713] [2023-08-04 00:51:13,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:13,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:13,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:13,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:51:13,278 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 00:51:13,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:13,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:51:13,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:14,347 INFO L124 PetriNetUnfolderBase]: 12242/18740 cut-off events. [2023-08-04 00:51:14,347 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2023-08-04 00:51:14,376 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 771. Compared 130770 event pairs, 9508 based on Foata normal form. 0/18512 useless extension candidates. Maximal degree in co-relation 11408. Up to 16198 conditions per place. [2023-08-04 00:51:14,427 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-04 00:51:14,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 220 flow [2023-08-04 00:51:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 00:51:14,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355785837651122 [2023-08-04 00:51:14,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 00:51:14,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 00:51:14,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:14,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 00:51:14,430 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 00:51:14,431 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 00:51:14,431 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 00:51:14,431 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 368 transitions. [2023-08-04 00:51:14,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 220 flow [2023-08-04 00:51:14,432 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 00:51:14,433 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-04 00:51:14,433 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 00:51:14,433 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:51:14,434 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-04 00:51:14,434 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 00:51:14,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:14,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:14,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:51:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:14,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash -330019714, now seen corresponding path program 1 times [2023-08-04 00:51:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25562125] [2023-08-04 00:51:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:14,684 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 00:51:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25562125] [2023-08-04 00:51:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25562125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317189131] [2023-08-04 00:51:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:14,687 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 00:51:14,801 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 00:51:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:14,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:14,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:14,884 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 00:51:14,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:14,900 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 00:51:14,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317189131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:14,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:14,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:51:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773461731] [2023-08-04 00:51:14,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:14,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:51:14,919 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 00:51:14,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:14,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:51:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:15,621 INFO L124 PetriNetUnfolderBase]: 9694/14591 cut-off events. [2023-08-04 00:51:15,621 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-04 00:51:15,645 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 95510 event pairs, 5616 based on Foata normal form. 3/14504 useless extension candidates. Maximal degree in co-relation 10429. Up to 12736 conditions per place. [2023-08-04 00:51:15,679 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 00:51:15,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 217 flow [2023-08-04 00:51:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 00:51:15,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152849740932642 [2023-08-04 00:51:15,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 00:51:15,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 00:51:15,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:15,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 00:51:15,682 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 00:51:15,683 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 00:51:15,684 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 00:51:15,684 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 475 transitions. [2023-08-04 00:51:15,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 217 flow [2023-08-04 00:51:15,685 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 00:51:15,685 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-04 00:51:15,685 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 00:51:15,686 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:51:15,686 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-04 00:51:15,686 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 00:51:15,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:15,686 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:15,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:51:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:15,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:15,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1970148859, now seen corresponding path program 1 times [2023-08-04 00:51:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164379465] [2023-08-04 00:51:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:15,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:15,929 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 00:51:15,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164379465] [2023-08-04 00:51:15,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164379465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769966456] [2023-08-04 00:51:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:15,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:15,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:15,931 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 00:51:15,933 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 00:51:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:15,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:51:15,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:16,007 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 00:51:16,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769966456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:16,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:51:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016241882] [2023-08-04 00:51:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:16,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:51:16,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:51:16,019 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 00:51:16,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:51:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:16,949 INFO L124 PetriNetUnfolderBase]: 9478/14173 cut-off events. [2023-08-04 00:51:16,950 INFO L125 PetriNetUnfolderBase]: For 1006/1006 co-relation queries the response was YES. [2023-08-04 00:51:16,971 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 630. Compared 91435 event pairs, 2182 based on Foata normal form. 81/14245 useless extension candidates. Maximal degree in co-relation 10157. Up to 11907 conditions per place. [2023-08-04 00:51:17,005 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-04 00:51:17,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 269 flow [2023-08-04 00:51:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:51:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:51:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-08-04 00:51:17,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196891191709845 [2023-08-04 00:51:17,008 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-08-04 00:51:17,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-08-04 00:51:17,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:17,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-08-04 00:51:17,009 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 00:51:17,010 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 00:51:17,010 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 00:51:17,011 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 598 transitions. [2023-08-04 00:51:17,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 269 flow [2023-08-04 00:51:17,012 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 00:51:17,012 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-04 00:51:17,012 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 00:51:17,013 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 00:51:17,013 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-04 00:51:17,013 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 00:51:17,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:17,013 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 00:51:17,030 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 00:51:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:17,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:17,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 960150384, now seen corresponding path program 1 times [2023-08-04 00:51:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62476454] [2023-08-04 00:51:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:17,272 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 00:51:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:17,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62476454] [2023-08-04 00:51:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62476454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:17,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984499917] [2023-08-04 00:51:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:17,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:17,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:17,274 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 00:51:17,277 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 00:51:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:17,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:17,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:17,359 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 00:51:17,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:17,369 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 00:51:17,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984499917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:17,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:17,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:51:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381593943] [2023-08-04 00:51:17,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:17,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:17,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-04 00:51:17,380 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 00:51:17,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:17,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-04 00:51:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:18,047 INFO L124 PetriNetUnfolderBase]: 7588/11203 cut-off events. [2023-08-04 00:51:18,047 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2023-08-04 00:51:18,071 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 68882 event pairs, 4450 based on Foata normal form. 27/11221 useless extension candidates. Maximal degree in co-relation 8129. Up to 9394 conditions per place. [2023-08-04 00:51:18,102 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 40 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:51:18,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 255 flow [2023-08-04 00:51:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 00:51:18,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256476683937824 [2023-08-04 00:51:18,104 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 00:51:18,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 00:51:18,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:18,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 00:51:18,105 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 00:51:18,106 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 00:51:18,106 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 00:51:18,107 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 483 transitions. [2023-08-04 00:51:18,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 255 flow [2023-08-04 00:51:18,108 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 00:51:18,108 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-04 00:51:18,109 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 00:51:18,109 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:51:18,109 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-04 00:51:18,109 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 00:51:18,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:18,109 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 00:51:18,114 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 00:51:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:18,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:18,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1414028444, now seen corresponding path program 1 times [2023-08-04 00:51:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:18,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808472276] [2023-08-04 00:51:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:18,367 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 00:51:18,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:18,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808472276] [2023-08-04 00:51:18,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808472276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:18,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:18,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:51:18,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167190273] [2023-08-04 00:51:18,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:18,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:51:18,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:18,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:51:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:51:18,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-04 00:51:18,379 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 00:51:18,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:18,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-04 00:51:18,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:18,716 INFO L124 PetriNetUnfolderBase]: 4672/7036 cut-off events. [2023-08-04 00:51:18,717 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-08-04 00:51:18,729 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 40765 event pairs, 568 based on Foata normal form. 729/7756 useless extension candidates. Maximal degree in co-relation 7349. Up to 4212 conditions per place. [2023-08-04 00:51:18,733 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-04 00:51:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-04 00:51:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-04 00:51:18,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.633419689119171 [2023-08-04 00:51:18,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-04 00:51:18,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-04 00:51:18,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:18,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-04 00:51:18,736 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 00:51:18,736 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 00:51:18,737 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 00:51:18,737 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 489 transitions. [2023-08-04 00:51:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-04 00:51:18,750 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 00:51:18,750 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-04 00:51:18,750 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 00:51:18,750 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:51:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-04 00:51:18,751 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 00:51:18,751 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:51:18,751 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:51:18,751 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:51:18,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:51:18,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:18,751 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:51:18,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:51:18,817 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 00:51:18,817 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:18,819 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 34. Compared 8869 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 00:51:18,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 00:51:18,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 112 transitions, 248 flow [2023-08-04 00:51:18,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:18,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 00:51:18,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 00:51:18,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 112 transitions, 248 flow [2023-08-04 00:51:18,866 INFO L124 PetriNetUnfolderBase]: 66/967 cut-off events. [2023-08-04 00:51:18,866 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:51:18,867 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 6007 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 00:51:18,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 00:51:20,272 INFO L134 LiptonReduction]: Checked pairs total: 8165 [2023-08-04 00:51:20,272 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-04 00:51:20,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:51:20,274 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;@194f75e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:20,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:51:20,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:20,276 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-04 00:51:20,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:20,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:20,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:51:20,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:20,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash 624668880, now seen corresponding path program 1 times [2023-08-04 00:51:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:20,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227373928] [2023-08-04 00:51:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:20,296 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 00:51:20,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:20,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227373928] [2023-08-04 00:51:20,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227373928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:20,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:20,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:20,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388137301] [2023-08-04 00:51:20,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:20,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:20,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:20,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 00:51:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 00:51:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 00:51:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:22,710 INFO L124 PetriNetUnfolderBase]: 33046/48161 cut-off events. [2023-08-04 00:51:22,710 INFO L125 PetriNetUnfolderBase]: For 1497/1497 co-relation queries the response was YES. [2023-08-04 00:51:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93552 conditions, 48161 events. 33046/48161 cut-off events. For 1497/1497 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 341043 event pairs, 26064 based on Foata normal form. 0/45314 useless extension candidates. Maximal degree in co-relation 26620. Up to 43520 conditions per place. [2023-08-04 00:51:22,909 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:51:22,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 00:51:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 00:51:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2023-08-04 00:51:22,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 00:51:22,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 00:51:22,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:22,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 00:51:22,911 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 00:51:22,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:22,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:22,912 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 368 transitions. [2023-08-04 00:51:22,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 00:51:22,913 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 00:51:22,914 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 00:51:22,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:22,914 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:51:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 00:51:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 00:51:22,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:22,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:51:22,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:22,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 965819557, now seen corresponding path program 1 times [2023-08-04 00:51:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508646370] [2023-08-04 00:51:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:22,938 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 00:51:22,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508646370] [2023-08-04 00:51:22,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508646370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152314066] [2023-08-04 00:51:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:22,940 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 00:51:22,942 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 00:51:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:22,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:51:22,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:23,003 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 00:51:23,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152314066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:23,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:51:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916817623] [2023-08-04 00:51:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:23,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 00:51:23,012 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 00:51:23,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:23,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 00:51:23,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:25,507 INFO L124 PetriNetUnfolderBase]: 31406/45017 cut-off events. [2023-08-04 00:51:25,508 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 00:51:25,605 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 1597. Compared 310306 event pairs, 24928 based on Foata normal form. 0/42773 useless extension candidates. Maximal degree in co-relation 87861. Up to 40987 conditions per place. [2023-08-04 00:51:25,705 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:51:25,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 00:51:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:51:25,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-04 00:51:25,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:51:25,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:51:25,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:25,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:51:25,709 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 00:51:25,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:25,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:25,710 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:51:25,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 00:51:25,710 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 00:51:25,711 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 00:51:25,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:25,712 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 00:51:25,712 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 00:51:25,712 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 00:51:25,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:25,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:25,717 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 00:51:25,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:25,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:25,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1326971937, now seen corresponding path program 1 times [2023-08-04 00:51:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:25,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049094215] [2023-08-04 00:51:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:25,945 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 00:51:25,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:25,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049094215] [2023-08-04 00:51:25,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049094215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:25,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886853039] [2023-08-04 00:51:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:25,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:25,946 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 00:51:25,948 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 00:51:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:26,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:51:26,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:26,014 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 00:51:26,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886853039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:26,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:51:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007010151] [2023-08-04 00:51:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:26,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 00:51:26,021 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 00:51:26,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:26,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 00:51:26,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:28,233 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 00:51:28,233 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 00:51:28,337 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 290337 event pairs, 23582 based on Foata normal form. 0/41615 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 00:51:28,599 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 00:51:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 00:51:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 00:51:28,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-08-04 00:51:28,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 00:51:28,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 00:51:28,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:28,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 00:51:28,603 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 00:51:28,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:28,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:28,605 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 375 transitions. [2023-08-04 00:51:28,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 00:51:28,606 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 00:51:28,606 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 00:51:28,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:28,607 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:51:28,607 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 00:51:28,607 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 00:51:28,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:28,607 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 00:51:28,633 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 00:51:28,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:28,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:28,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash 197812920, now seen corresponding path program 1 times [2023-08-04 00:51:28,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:28,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326262117] [2023-08-04 00:51:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:28,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:28,848 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 00:51:28,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:28,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326262117] [2023-08-04 00:51:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326262117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:28,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029448747] [2023-08-04 00:51:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:28,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:28,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:28,850 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 00:51:28,852 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 00:51:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:28,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:28,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:28,920 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 00:51:28,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:28,935 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 00:51:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029448747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:28,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:28,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:51:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27539621] [2023-08-04 00:51:28,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:28,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 00:51:28,947 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 00:51:28,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:28,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 00:51:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:30,589 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 00:51:30,589 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 00:51:30,697 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 214150 event pairs, 14820 based on Foata normal form. 3/33860 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 00:51:31,063 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 00:51:31,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 00:51:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 00:51:31,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702380952380952 [2023-08-04 00:51:31,065 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 00:51:31,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 00:51:31,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:31,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 00:51:31,066 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 00:51:31,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:31,067 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:31,067 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 479 transitions. [2023-08-04 00:51:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 00:51:31,070 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 00:51:31,070 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 00:51:31,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:31,071 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:51:31,071 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 00:51:31,071 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 00:51:31,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:31,071 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 00:51:31,075 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 00:51:31,274 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,SelfDestructingSolverStorable12 [2023-08-04 00:51:31,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:31,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 973553998, now seen corresponding path program 1 times [2023-08-04 00:51:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089730367] [2023-08-04 00:51:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:31,312 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 00:51:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089730367] [2023-08-04 00:51:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089730367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068719144] [2023-08-04 00:51:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:31,332 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 00:51:31,334 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 00:51:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:31,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:31,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:31,415 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 00:51:31,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:31,427 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 00:51:31,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068719144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:31,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:51:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79442613] [2023-08-04 00:51:31,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:31,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:31,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 00:51:31,438 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 00:51:31,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:31,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 00:51:31,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:33,097 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 00:51:33,097 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 00:51:33,133 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 160152 event pairs, 11902 based on Foata normal form. 27/26503 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 00:51:33,190 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 00:51:33,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 00:51:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 00:51:33,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797619047619048 [2023-08-04 00:51:33,192 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 00:51:33,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 00:51:33,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:33,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 00:51:33,194 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 00:51:33,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:33,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:33,195 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 487 transitions. [2023-08-04 00:51:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 00:51:33,197 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 00:51:33,198 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 00:51:33,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:33,198 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 00:51:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 00:51:33,199 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 00:51:33,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:33,199 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 00:51:33,205 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 00:51:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:51:33,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:33,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2081711271, now seen corresponding path program 1 times [2023-08-04 00:51:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:33,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590584258] [2023-08-04 00:51:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:33,458 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 00:51:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590584258] [2023-08-04 00:51:33,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590584258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217463596] [2023-08-04 00:51:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:33,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:33,460 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 00:51:33,489 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 00:51:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:33,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:33,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:33,583 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 00:51:33,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:33,595 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 00:51:33,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217463596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:33,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:33,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:51:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639506791] [2023-08-04 00:51:33,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:33,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:33,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 00:51:33,606 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 00:51:33,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:33,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 00:51:33,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:34,873 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 00:51:34,873 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 00:51:34,905 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 128284 event pairs, 6886 based on Foata normal form. 243/23443 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 00:51:34,956 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 00:51:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 00:51:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-04 00:51:34,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2023-08-04 00:51:34,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-04 00:51:34,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-04 00:51:34,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:34,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-04 00:51:34,959 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 00:51:34,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:34,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:34,960 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 495 transitions. [2023-08-04 00:51:34,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 00:51:34,962 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 00:51:34,963 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 00:51:34,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 00:51:34,963 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 00:51:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 00:51:34,963 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 00:51:34,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:34,964 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 00:51:34,980 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 00:51:35,168 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,SelfDestructingSolverStorable14 [2023-08-04 00:51:35,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:35,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1260964095, now seen corresponding path program 1 times [2023-08-04 00:51:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:35,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263057364] [2023-08-04 00:51:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:35,314 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 00:51:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263057364] [2023-08-04 00:51:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263057364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:51:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455835513] [2023-08-04 00:51:35,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:35,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 210 [2023-08-04 00:51:35,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 00:51:35,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:35,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 210 [2023-08-04 00:51:35,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:40,461 INFO L124 PetriNetUnfolderBase]: 76294/97897 cut-off events. [2023-08-04 00:51:40,461 INFO L125 PetriNetUnfolderBase]: For 47490/47490 co-relation queries the response was YES. [2023-08-04 00:51:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223335 conditions, 97897 events. 76294/97897 cut-off events. For 47490/47490 co-relation queries the response was YES. Maximal size of possible extension queue 3595. Compared 571233 event pairs, 27670 based on Foata normal form. 1732/99591 useless extension candidates. Maximal degree in co-relation 81411. Up to 64029 conditions per place. [2023-08-04 00:51:41,000 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 54 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-08-04 00:51:41,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 385 flow [2023-08-04 00:51:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:51:41,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-04 00:51:41,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:51:41,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:51:41,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:41,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:51:41,002 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 00:51:41,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:41,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:41,003 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:51:41,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 385 flow [2023-08-04 00:51:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 371 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:51:41,104 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 221 flow [2023-08-04 00:51:41,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-04 00:51:41,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 00:51:41,104 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 221 flow [2023-08-04 00:51:41,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 00:51:41,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:41,105 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 00:51:41,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:51:41,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:41,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash -435183078, now seen corresponding path program 1 times [2023-08-04 00:51:41,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:41,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362018888] [2023-08-04 00:51:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:41,184 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 00:51:41,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:41,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362018888] [2023-08-04 00:51:41,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362018888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:41,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:51:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655545016] [2023-08-04 00:51:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:41,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:41,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 210 [2023-08-04 00:51:41,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 00:51:41,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:41,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 210 [2023-08-04 00:51:41,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:45,576 INFO L124 PetriNetUnfolderBase]: 55682/74817 cut-off events. [2023-08-04 00:51:45,577 INFO L125 PetriNetUnfolderBase]: For 55082/55735 co-relation queries the response was YES. [2023-08-04 00:51:45,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202417 conditions, 74817 events. 55682/74817 cut-off events. For 55082/55735 co-relation queries the response was YES. Maximal size of possible extension queue 2888. Compared 473716 event pairs, 10980 based on Foata normal form. 128/73171 useless extension candidates. Maximal degree in co-relation 119360. Up to 55522 conditions per place. [2023-08-04 00:51:46,164 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 50 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-04 00:51:46,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 410 flow [2023-08-04 00:51:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-04 00:51:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2023-08-04 00:51:46,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-04 00:51:46,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-04 00:51:46,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:46,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-04 00:51:46,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:46,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:46,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:51:46,169 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 221 flow. Second operand 3 states and 380 transitions. [2023-08-04 00:51:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 410 flow [2023-08-04 00:51:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:51:46,607 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 244 flow [2023-08-04 00:51:46,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-04 00:51:46,608 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-04 00:51:46,608 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 244 flow [2023-08-04 00:51:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 00:51:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:46,615 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 00:51:46,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:51:46,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:46,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -435182148, now seen corresponding path program 1 times [2023-08-04 00:51:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649165371] [2023-08-04 00:51:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:46,804 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 00:51:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649165371] [2023-08-04 00:51:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649165371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:46,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551878211] [2023-08-04 00:51:46,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:46,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:51:46,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:46,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:51:46,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:51:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 210 [2023-08-04 00:51:46,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 00:51:46,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:46,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 210 [2023-08-04 00:51:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:57,300 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, 42#L744true, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), 114#L741true, P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, P2Thread2of2ForFork2InUse, 107#P0EXITtrue, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 607#true, Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1)]) [2023-08-04 00:51:57,300 INFO L294 olderBase$Statistics]: this new event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,300 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,300 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,300 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,328 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, 56#L741true, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 27#L744true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 55#L759true, 607#true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1)]) [2023-08-04 00:51:57,329 INFO L294 olderBase$Statistics]: this new event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,329 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,329 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,329 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-08-04 00:51:57,355 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, 42#L744true, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 27#L744true, 124#L788true, 615#(= ~__unbuffered_p2_EAX~0 0), Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 12#P0EXITtrue, Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:57,355 INFO L294 olderBase$Statistics]: this new event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,355 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,360 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,360 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,667 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([597] L729-->P0EXIT: Formula: (and (= |v_P0Thread2of2ForFork0_#res.base_11| 0) (= |v_P0Thread2of2ForFork0_#res.offset_11| 0) (= (+ v_~__unbuffered_cnt~0_96 1) v_~__unbuffered_cnt~0_95)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_96} OutVars{P0Thread2of2ForFork0_#res.base=|v_P0Thread2of2ForFork0_#res.base_11|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_95, P0Thread2of2ForFork0_#res.offset=|v_P0Thread2of2ForFork0_#res.offset_11|} AuxVars[] AssignedVars[P0Thread2of2ForFork0_#res.base, ~__unbuffered_cnt~0, P0Thread2of2ForFork0_#res.offset][27], [P0Thread2of2ForFork0InUse, 42#L744true, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, P2Thread2of2ForFork2InUse, 107#P0EXITtrue, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 27#L744true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:57,667 INFO L294 olderBase$Statistics]: this new event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,668 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,668 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,668 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,692 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), 114#L741true, P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, P2Thread2of2ForFork2InUse, 107#P0EXITtrue, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 119#P1EXITtrue, 69#L759true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 607#true, Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1)]) [2023-08-04 00:51:57,692 INFO L294 olderBase$Statistics]: this new event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,692 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,692 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,693 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,710 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, 56#L741true, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 115#P1EXITtrue, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 55#L759true, 607#true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1)]) [2023-08-04 00:51:57,710 INFO L294 olderBase$Statistics]: this new event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,710 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,710 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,710 INFO L297 olderBase$Statistics]: existing Event has 42 ancestors and is cut-off event [2023-08-04 00:51:57,722 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 119#P1EXITtrue, 69#L759true, 27#L744true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), 12#P0EXITtrue, Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:57,722 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,722 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,722 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,722 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,966 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, 42#L744true, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 115#P1EXITtrue, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), 12#P0EXITtrue, Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:57,966 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,966 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,966 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:57,966 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,112 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([597] L729-->P0EXIT: Formula: (and (= |v_P0Thread2of2ForFork0_#res.base_11| 0) (= |v_P0Thread2of2ForFork0_#res.offset_11| 0) (= (+ v_~__unbuffered_cnt~0_96 1) v_~__unbuffered_cnt~0_95)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_96} OutVars{P0Thread2of2ForFork0_#res.base=|v_P0Thread2of2ForFork0_#res.base_11|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_95, P0Thread2of2ForFork0_#res.offset=|v_P0Thread2of2ForFork0_#res.offset_11|} AuxVars[] AssignedVars[P0Thread2of2ForFork0_#res.base, ~__unbuffered_cnt~0, P0Thread2of2ForFork0_#res.offset][27], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, P2Thread2of2ForFork2InUse, 107#P0EXITtrue, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 119#P1EXITtrue, 69#L759true, 27#L744true, 124#L788true, Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 615#(= ~__unbuffered_p2_EAX~0 0), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:58,112 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,112 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,112 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,112 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,116 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([597] L729-->P0EXIT: Formula: (and (= |v_P0Thread2of2ForFork0_#res.base_11| 0) (= |v_P0Thread2of2ForFork0_#res.offset_11| 0) (= (+ v_~__unbuffered_cnt~0_96 1) v_~__unbuffered_cnt~0_95)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_96} OutVars{P0Thread2of2ForFork0_#res.base=|v_P0Thread2of2ForFork0_#res.base_11|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_95, P0Thread2of2ForFork0_#res.offset=|v_P0Thread2of2ForFork0_#res.offset_11|} AuxVars[] AssignedVars[P0Thread2of2ForFork0_#res.base, ~__unbuffered_cnt~0, P0Thread2of2ForFork0_#res.offset][27], [P0Thread2of2ForFork0InUse, 42#L744true, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 69#L759true, 115#P1EXITtrue, 124#L788true, 615#(= ~__unbuffered_p2_EAX~0 0), Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:58,116 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,116 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,116 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,116 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:51:58,141 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([591] L729-->P0EXIT: Formula: (and (= |v_P0Thread1of2ForFork0_#res.base_12| 0) (= (+ v_~__unbuffered_cnt~0_88 1) v_~__unbuffered_cnt~0_87) (= 0 |v_P0Thread1of2ForFork0_#res.offset_12|)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_88} OutVars{P0Thread1of2ForFork0_#res.offset=|v_P0Thread1of2ForFork0_#res.offset_12|, P0Thread1of2ForFork0_#res.base=|v_P0Thread1of2ForFork0_#res.base_12|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_87} AuxVars[] AssignedVars[P0Thread1of2ForFork0_#res.offset, P0Thread1of2ForFork0_#res.base, ~__unbuffered_cnt~0][26], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 119#P1EXITtrue, 69#L759true, 115#P1EXITtrue, 124#L788true, 615#(= ~__unbuffered_p2_EAX~0 0), Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), 12#P0EXITtrue, Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:58,141 INFO L294 olderBase$Statistics]: this new event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,141 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,141 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,141 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,209 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([597] L729-->P0EXIT: Formula: (and (= |v_P0Thread2of2ForFork0_#res.base_11| 0) (= |v_P0Thread2of2ForFork0_#res.offset_11| 0) (= (+ v_~__unbuffered_cnt~0_96 1) v_~__unbuffered_cnt~0_95)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_96} OutVars{P0Thread2of2ForFork0_#res.base=|v_P0Thread2of2ForFork0_#res.base_11|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_95, P0Thread2of2ForFork0_#res.offset=|v_P0Thread2of2ForFork0_#res.offset_11|} AuxVars[] AssignedVars[P0Thread2of2ForFork0_#res.base, ~__unbuffered_cnt~0, P0Thread2of2ForFork0_#res.offset][27], [P0Thread2of2ForFork0InUse, P1Thread1of2ForFork1InUse, Black: 609#(= ~__unbuffered_p2_EAX~0 0), P1Thread2of2ForFork1InUse, P2Thread1of2ForFork2InUse, 107#P0EXITtrue, P2Thread2of2ForFork2InUse, Black: 165#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 140#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 119#P1EXITtrue, 69#L759true, 115#P1EXITtrue, 124#L788true, 615#(= ~__unbuffered_p2_EAX~0 0), Black: 452#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 211#(<= |ULTIMATE.start_main_~asdf~2#1| 0), 12#P0EXITtrue, P0Thread1of2ForFork0InUse, Black: 601#true, 55#L759true, Black: 220#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 324#(<= |ULTIMATE.start_main_~asdf~1#1| 1), 607#true]) [2023-08-04 00:51:58,209 INFO L294 olderBase$Statistics]: this new event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,209 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,209 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,209 INFO L297 olderBase$Statistics]: existing Event has 44 ancestors and is cut-off event [2023-08-04 00:51:58,255 INFO L124 PetriNetUnfolderBase]: 146379/191298 cut-off events. [2023-08-04 00:51:58,255 INFO L125 PetriNetUnfolderBase]: For 158663/158964 co-relation queries the response was YES. [2023-08-04 00:51:59,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499110 conditions, 191298 events. 146379/191298 cut-off events. For 158663/158964 co-relation queries the response was YES. Maximal size of possible extension queue 8046. Compared 1267058 event pairs, 20911 based on Foata normal form. 3898/184240 useless extension candidates. Maximal degree in co-relation 288332. Up to 77217 conditions per place. [2023-08-04 00:51:59,549 INFO L140 encePairwiseOnDemand]: 204/210 looper letters, 81 selfloop transitions, 11 changer transitions 4/107 dead transitions. [2023-08-04 00:51:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 107 transitions, 669 flow [2023-08-04 00:51:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 00:51:59,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2023-08-04 00:51:59,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 00:51:59,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 00:51:59,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:59,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 00:51:59,566 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 00:51:59,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:59,567 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 00:51:59,567 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 244 flow. Second operand 4 states and 508 transitions. [2023-08-04 00:51:59,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 107 transitions, 669 flow [2023-08-04 00:51:59,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:51:59,620 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 350 flow [2023-08-04 00:51:59,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2023-08-04 00:51:59,621 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-04 00:51:59,621 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 350 flow [2023-08-04 00:51:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 00:51:59,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:59,621 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 00:51:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:51:59,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:59,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 322371567, now seen corresponding path program 1 times [2023-08-04 00:51:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282999910] [2023-08-04 00:51:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:59,708 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 00:51:59,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:59,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282999910] [2023-08-04 00:51:59,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282999910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:59,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:59,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615155943] [2023-08-04 00:51:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:59,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:59,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:59,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 210 [2023-08-04 00:51:59,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 00:51:59,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:59,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 210 [2023-08-04 00:51:59,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:08,489 INFO L124 PetriNetUnfolderBase]: 100427/131445 cut-off events. [2023-08-04 00:52:08,489 INFO L125 PetriNetUnfolderBase]: For 189272/191036 co-relation queries the response was YES. [2023-08-04 00:52:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386234 conditions, 131445 events. 100427/131445 cut-off events. For 189272/191036 co-relation queries the response was YES. Maximal size of possible extension queue 6366. Compared 852268 event pairs, 20809 based on Foata normal form. 907/118480 useless extension candidates. Maximal degree in co-relation 298440. Up to 116330 conditions per place. [2023-08-04 00:52:09,428 INFO L140 encePairwiseOnDemand]: 202/210 looper letters, 85 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-08-04 00:52:09,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 793 flow [2023-08-04 00:52:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 00:52:09,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015873015873016 [2023-08-04 00:52:09,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 00:52:09,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 00:52:09,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:09,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 00:52:09,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 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 00:52:09,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:52:09,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 00:52:09,432 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 350 flow. Second operand 3 states and 379 transitions. [2023-08-04 00:52:09,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 793 flow [2023-08-04 00:52:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 776 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:09,460 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 388 flow [2023-08-04 00:52:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-04 00:52:09,460 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2023-08-04 00:52:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 388 flow [2023-08-04 00:52:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 00:52:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:09,460 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 00:52:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 00:52:09,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:09,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 157702387, now seen corresponding path program 1 times [2023-08-04 00:52:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295810127] [2023-08-04 00:52:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:52:09,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:09,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295810127] [2023-08-04 00:52:09,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295810127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968738549] [2023-08-04 00:52:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:09,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:09,583 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 00:52:09,585 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 00:52:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:09,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 00:52:09,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:52:09,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:52:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968738549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:10,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 14 [2023-08-04 00:52:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395198082] [2023-08-04 00:52:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:10,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 00:52:10,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 00:52:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-04 00:52:10,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-08-04 00:52:10,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 388 flow. Second operand has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 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 00:52:10,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:10,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-08-04 00:52:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:32,332 INFO L124 PetriNetUnfolderBase]: 275431/351911 cut-off events. [2023-08-04 00:52:32,332 INFO L125 PetriNetUnfolderBase]: For 462916/462916 co-relation queries the response was YES. [2023-08-04 00:52:33,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148989 conditions, 351911 events. 275431/351911 cut-off events. For 462916/462916 co-relation queries the response was YES. Maximal size of possible extension queue 12136. Compared 2232461 event pairs, 9141 based on Foata normal form. 9444/361239 useless extension candidates. Maximal degree in co-relation 493787. Up to 132917 conditions per place. [2023-08-04 00:52:34,937 INFO L140 encePairwiseOnDemand]: 191/210 looper letters, 327 selfloop transitions, 261 changer transitions 4/595 dead transitions. [2023-08-04 00:52:34,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 595 transitions, 4289 flow [2023-08-04 00:52:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 00:52:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 00:52:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2226 transitions. [2023-08-04 00:52:34,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2023-08-04 00:52:34,941 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2226 transitions. [2023-08-04 00:52:34,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2226 transitions. [2023-08-04 00:52:34,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:34,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2226 transitions. [2023-08-04 00:52:34,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 117.15789473684211) internal successors, (2226), 19 states have internal predecessors, (2226), 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 00:52:34,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 210.0) internal successors, (4200), 20 states have internal predecessors, (4200), 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 00:52:34,950 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 210.0) internal successors, (4200), 20 states have internal predecessors, (4200), 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 00:52:34,950 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 388 flow. Second operand 19 states and 2226 transitions. [2023-08-04 00:52:34,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 595 transitions, 4289 flow [2023-08-04 00:52:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 595 transitions, 4256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:35,162 INFO L231 Difference]: Finished difference. Result has 105 places, 325 transitions, 2773 flow [2023-08-04 00:52:35,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2773, PETRI_PLACES=105, PETRI_TRANSITIONS=325} [2023-08-04 00:52:35,163 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 54 predicate places. [2023-08-04 00:52:35,163 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 325 transitions, 2773 flow [2023-08-04 00:52:35,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 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 00:52:35,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:35,163 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 00:52:35,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:35,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:35,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2067667431, now seen corresponding path program 1 times [2023-08-04 00:52:35,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157840781] [2023-08-04 00:52:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:52:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157840781] [2023-08-04 00:52:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157840781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769374735] [2023-08-04 00:52:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:35,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:35,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:35,553 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 00:52:35,597 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 00:52:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:35,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 00:52:35,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 00:52:35,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 00:52:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769374735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:36,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 19 [2023-08-04 00:52:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089438239] [2023-08-04 00:52:36,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:36,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 00:52:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 00:52:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2023-08-04 00:52:36,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 210 [2023-08-04 00:52:36,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 325 transitions, 2773 flow. Second operand has 20 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 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 00:52:36,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:36,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 210 [2023-08-04 00:52:36,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:53:52,620 INFO L124 PetriNetUnfolderBase]: 545491/708267 cut-off events. [2023-08-04 00:53:52,620 INFO L125 PetriNetUnfolderBase]: For 4744185/4744185 co-relation queries the response was YES. [2023-08-04 00:53:57,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464776 conditions, 708267 events. 545491/708267 cut-off events. For 4744185/4744185 co-relation queries the response was YES. Maximal size of possible extension queue 29036. Compared 5106850 event pairs, 7321 based on Foata normal form. 24524/732618 useless extension candidates. Maximal degree in co-relation 3464650. Up to 264906 conditions per place. [2023-08-04 00:54:00,449 INFO L140 encePairwiseOnDemand]: 189/210 looper letters, 985 selfloop transitions, 1884 changer transitions 58/2930 dead transitions. [2023-08-04 00:54:00,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 2930 transitions, 30575 flow [2023-08-04 00:54:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-04 00:54:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-04 00:54:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 7506 transitions. [2023-08-04 00:54:00,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415584415584416 [2023-08-04 00:54:00,461 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 7506 transitions. [2023-08-04 00:54:00,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 7506 transitions. [2023-08-04 00:54:00,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:54:00,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 7506 transitions. [2023-08-04 00:54:00,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 113.72727272727273) internal successors, (7506), 66 states have internal predecessors, (7506), 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 00:54:00,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 210.0) internal successors, (14070), 67 states have internal predecessors, (14070), 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 00:54:00,625 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 210.0) internal successors, (14070), 67 states have internal predecessors, (14070), 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 00:54:00,625 INFO L175 Difference]: Start difference. First operand has 105 places, 325 transitions, 2773 flow. Second operand 66 states and 7506 transitions. [2023-08-04 00:54:00,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 2930 transitions, 30575 flow