/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_mix006_tso.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:08:40,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:08:40,276 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:08:40,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:08:40,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:08:40,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:08:40,281 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:08:40,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:08:40,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:08:40,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:08:40,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:08:40,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:08:40,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:08:40,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:08:40,325 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:08:40,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:08:40,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:08:40,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:08:40,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:08:40,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:08:40,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:08:40,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:08:40,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:08:40,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:08:40,335 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:08:40,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:08:40,336 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:08:40,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:08:40,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:08:40,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:08:40,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:08:40,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:08:40,338 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:08:40,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:08:40,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:08:40,339 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:08:40,339 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:08:40,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:08:40,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:08:40,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:08:40,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:08:40,589 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:08:40,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006_tso.oepc_bound2.i [2023-08-03 23:08:41,790 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:08:42,006 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:08:42,006 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006_tso.oepc_bound2.i [2023-08-03 23:08:42,021 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c0b7347/2ae8db0060fc49e885f7c0544ead45e6/FLAGae5102342 [2023-08-03 23:08:42,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c0b7347/2ae8db0060fc49e885f7c0544ead45e6 [2023-08-03 23:08:42,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:08:42,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:08:42,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:08:42,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:08:42,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:08:42,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1018781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42, skipping insertion in model container [2023-08-03 23:08:42,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,390 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:08:42,509 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_mix006_tso.oepc_bound2.i[949,962] [2023-08-03 23:08:42,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:08:42,791 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:08:42,804 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_mix006_tso.oepc_bound2.i[949,962] [2023-08-03 23:08:42,819 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:08:42,820 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:08:42,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:08:42,900 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:08:42,900 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:08:42,906 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:08:42,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42 WrapperNode [2023-08-03 23:08:42,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:08:42,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:08:42,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:08:42,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:08:42,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,985 INFO L138 Inliner]: procedures = 176, calls = 59, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 288 [2023-08-03 23:08:42,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:08:42,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:08:42,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:08:42,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:08:42,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:42,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,020 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,024 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:08:43,025 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:08:43,025 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:08:43,025 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:08:43,026 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (1/1) ... [2023-08-03 23:08:43,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:08:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:08:43,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:08:43,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:08:43,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:08:43,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:08:43,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:08:43,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:08:43,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:08:43,123 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:08:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:08:43,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:08:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:08:43,123 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:08:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:08:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:08:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:08:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:08:43,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:08:43,125 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:08:43,240 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:08:43,241 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:08:43,659 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:08:43,890 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:08:43,890 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:08:43,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:08:43 BoogieIcfgContainer [2023-08-03 23:08:43,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:08:43,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:08:43,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:08:43,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:08:43,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:08:42" (1/3) ... [2023-08-03 23:08:43,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad73e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:08:43, skipping insertion in model container [2023-08-03 23:08:43,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:08:42" (2/3) ... [2023-08-03 23:08:43,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad73e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:08:43, skipping insertion in model container [2023-08-03 23:08:43,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:08:43" (3/3) ... [2023-08-03 23:08:43,903 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix006_tso.oepc_bound2.i [2023-08-03 23:08:43,910 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:08:43,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:08:43,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-03 23:08:43,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:08:43,980 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:08:44,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 150 transitions, 315 flow [2023-08-03 23:08:44,185 INFO L124 PetriNetUnfolderBase]: 30/477 cut-off events. [2023-08-03 23:08:44,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:08:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 477 events. 30/477 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2056 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 290. Up to 16 conditions per place. [2023-08-03 23:08:44,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 150 transitions, 315 flow [2023-08-03 23:08:44,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 121 transitions, 257 flow [2023-08-03 23:08:44,202 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:08:44,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 121 transitions, 257 flow [2023-08-03 23:08:44,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 121 transitions, 257 flow [2023-08-03 23:08:44,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 121 transitions, 257 flow [2023-08-03 23:08:44,253 INFO L124 PetriNetUnfolderBase]: 6/245 cut-off events. [2023-08-03 23:08:44,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:08:44,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 245 events. 6/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 683 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-08-03 23:08:44,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 1604 [2023-08-03 23:08:48,878 INFO L134 LiptonReduction]: Checked pairs total: 5346 [2023-08-03 23:08:48,878 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 23:08:48,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:08:48,894 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;@689016fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:08:48,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:08:48,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:08:48,901 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-08-03 23:08:48,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:08:48,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:08:48,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:08:48,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:08:48,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:08:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash 867667696, now seen corresponding path program 1 times [2023-08-03 23:08:48,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:08:48,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664557441] [2023-08-03 23:08:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:08:48,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:08:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:08:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:08:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:08:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664557441] [2023-08-03 23:08:49,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664557441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:08:49,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:08:49,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:08:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261968897] [2023-08-03 23:08:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:08:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:08:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:08:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:08:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:08:49,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 248 [2023-08-03 23:08:49,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:49,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:08:49,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 248 [2023-08-03 23:08:49,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:08:49,493 INFO L124 PetriNetUnfolderBase]: 907/1526 cut-off events. [2023-08-03 23:08:49,493 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-03 23:08:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1526 events. 907/1526 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7609 event pairs, 520 based on Foata normal form. 0/1354 useless extension candidates. Maximal degree in co-relation 3069. Up to 1424 conditions per place. [2023-08-03 23:08:49,504 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 27 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-03 23:08:49,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 141 flow [2023-08-03 23:08:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:08:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:08:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-03 23:08:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443548387096774 [2023-08-03 23:08:49,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-03 23:08:49,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-03 23:08:49,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:08:49,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-03 23:08:49,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:49,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:49,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:49,538 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 75 flow. Second operand 3 states and 405 transitions. [2023-08-03 23:08:49,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 141 flow [2023-08-03 23:08:49,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 141 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:08:49,542 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 83 flow [2023-08-03 23:08:49,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-03 23:08:49,546 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-03 23:08:49,546 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 83 flow [2023-08-03 23:08:49,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:49,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:08:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:08:49,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:08:49,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:08:49,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:08:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 855921457, now seen corresponding path program 1 times [2023-08-03 23:08:49,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:08:49,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311186192] [2023-08-03 23:08:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:08:49,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:08:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:08:49,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:08:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:08:49,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:08:49,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:08:49,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:08:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:08:49,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:08:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:08:49,601 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:08:49,602 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:08:49,603 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:08:49,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:08:49,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:08:49,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 178 transitions, 392 flow [2023-08-03 23:08:49,853 INFO L124 PetriNetUnfolderBase]: 93/1441 cut-off events. [2023-08-03 23:08:49,853 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:08:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1539 conditions, 1441 events. 93/1441 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9927 event pairs, 0 based on Foata normal form. 0/1258 useless extension candidates. Maximal degree in co-relation 1046. Up to 54 conditions per place. [2023-08-03 23:08:49,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 178 transitions, 392 flow [2023-08-03 23:08:49,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 149 transitions, 334 flow [2023-08-03 23:08:49,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:08:49,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 149 transitions, 334 flow [2023-08-03 23:08:49,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 149 transitions, 334 flow [2023-08-03 23:08:49,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 149 transitions, 334 flow [2023-08-03 23:08:49,952 INFO L124 PetriNetUnfolderBase]: 12/658 cut-off events. [2023-08-03 23:08:49,953 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:08:49,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 658 events. 12/658 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3369 event pairs, 0 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 524. Up to 27 conditions per place. [2023-08-03 23:08:49,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 4600 [2023-08-03 23:08:54,338 INFO L134 LiptonReduction]: Checked pairs total: 18030 [2023-08-03 23:08:54,341 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-03 23:08:54,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:08:54,350 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;@689016fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:08:54,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:08:54,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:08:54,363 INFO L124 PetriNetUnfolderBase]: 0/74 cut-off events. [2023-08-03 23:08:54,363 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:08:54,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:08:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:08:54,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:08:54,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:08:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1886847878, now seen corresponding path program 1 times [2023-08-03 23:08:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:08:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145164506] [2023-08-03 23:08:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:08:54,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:08:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:08:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:08:54,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:08:54,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145164506] [2023-08-03 23:08:54,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145164506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:08:54,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:08:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:08:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925982894] [2023-08-03 23:08:54,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:08:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:08:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:08:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:08:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:08:54,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 284 [2023-08-03 23:08:54,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:08:54,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:08:54,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 284 [2023-08-03 23:08:54,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:09:48,296 INFO L124 PetriNetUnfolderBase]: 401211/507403 cut-off events. [2023-08-03 23:09:48,297 INFO L125 PetriNetUnfolderBase]: For 22780/22780 co-relation queries the response was YES. [2023-08-03 23:09:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034466 conditions, 507403 events. 401211/507403 cut-off events. For 22780/22780 co-relation queries the response was YES. Maximal size of possible extension queue 13080. Compared 3250148 event pairs, 325944 based on Foata normal form. 0/446474 useless extension candidates. Maximal degree in co-relation 222941. Up to 501568 conditions per place. [2023-08-03 23:09:51,573 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 45 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 23:09:51,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 244 flow [2023-08-03 23:09:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:09:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:09:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-03 23:09:51,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492957746478874 [2023-08-03 23:09:51,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-03 23:09:51,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-03 23:09:51,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:09:51,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-03 23:09:51,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:09:51,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:09:51,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:09:51,581 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 140 flow. Second operand 3 states and 468 transitions. [2023-08-03 23:09:51,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 244 flow [2023-08-03 23:09:51,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 238 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:09:51,606 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 146 flow [2023-08-03 23:09:51,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-03 23:09:51,607 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-03 23:09:51,607 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 146 flow [2023-08-03 23:09:51,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:09:51,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:09:51,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:09:51,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:09:51,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:09:51,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:09:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash -557206244, now seen corresponding path program 1 times [2023-08-03 23:09:51,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:09:51,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331264856] [2023-08-03 23:09:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:09:51,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:09:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:09:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:09:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:09:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331264856] [2023-08-03 23:09:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331264856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:09:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500025837] [2023-08-03 23:09:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:09:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:09:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:09:51,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:09:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:09:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:09:51,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:09:51,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:09:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:09:51,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:09:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500025837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:09:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:09:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:09:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058291975] [2023-08-03 23:09:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:09:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:09:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:09:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:09:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:09:51,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 284 [2023-08-03 23:09:51,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:09:51,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:09:51,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 284 [2023-08-03 23:09:51,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:10:43,199 INFO L124 PetriNetUnfolderBase]: 401187/507383 cut-off events. [2023-08-03 23:10:43,199 INFO L125 PetriNetUnfolderBase]: For 21644/21644 co-relation queries the response was YES. [2023-08-03 23:10:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033345 conditions, 507383 events. 401187/507383 cut-off events. For 21644/21644 co-relation queries the response was YES. Maximal size of possible extension queue 13080. Compared 3267413 event pairs, 265740 based on Foata normal form. 16/446498 useless extension candidates. Maximal degree in co-relation 270869. Up to 501485 conditions per place. [2023-08-03 23:10:46,543 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 50 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-08-03 23:10:46,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 274 flow [2023-08-03 23:10:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:10:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:10:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-03 23:10:46,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528169014084507 [2023-08-03 23:10:46,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-03 23:10:46,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-03 23:10:46,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:10:46,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-03 23:10:46,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:10:46,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:10:46,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:10:46,557 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 146 flow. Second operand 5 states and 750 transitions. [2023-08-03 23:10:46,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 274 flow [2023-08-03 23:10:46,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:10:46,573 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 160 flow [2023-08-03 23:10:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-03 23:10:46,574 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-03 23:10:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 160 flow [2023-08-03 23:10:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:10:46,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:10:46,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:10:46,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 23:10:46,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:10:46,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:10:46,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:10:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1588610439, now seen corresponding path program 1 times [2023-08-03 23:10:46,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:10:46,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068179693] [2023-08-03 23:10:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:10:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:10:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:10:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:10:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:10:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068179693] [2023-08-03 23:10:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068179693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:10:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631034017] [2023-08-03 23:10:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:10:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:10:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:10:46,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:10:46,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:10:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:10:46,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:10:46,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:10:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:10:46,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:10:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631034017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:10:46,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:10:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:10:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620051505] [2023-08-03 23:10:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:10:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:10:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:10:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:10:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:10:46,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 284 [2023-08-03 23:10:46,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:10:46,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:10:46,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 284 [2023-08-03 23:10:46,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:11:38,696 INFO L124 PetriNetUnfolderBase]: 396992/516113 cut-off events. [2023-08-03 23:11:38,697 INFO L125 PetriNetUnfolderBase]: For 20763/20763 co-relation queries the response was YES. [2023-08-03 23:11:40,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038383 conditions, 516113 events. 396992/516113 cut-off events. For 20763/20763 co-relation queries the response was YES. Maximal size of possible extension queue 14093. Compared 3577433 event pairs, 312389 based on Foata normal form. 0/456912 useless extension candidates. Maximal degree in co-relation 407437. Up to 495216 conditions per place. [2023-08-03 23:11:42,217 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 55 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-03 23:11:42,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 304 flow [2023-08-03 23:11:42,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:11:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:11:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-03 23:11:42,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598591549295775 [2023-08-03 23:11:42,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-03 23:11:42,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-03 23:11:42,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:11:42,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-03 23:11:42,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:11:42,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:11:42,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:11:42,222 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 160 flow. Second operand 3 states and 477 transitions. [2023-08-03 23:11:42,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 304 flow [2023-08-03 23:11:42,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 297 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:11:42,230 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 168 flow [2023-08-03 23:11:42,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-03 23:11:42,230 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-03 23:11:42,231 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 168 flow [2023-08-03 23:11:42,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:11:42,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:11:42,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:11:42,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:11:42,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:11:42,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:11:42,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:11:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2073692957, now seen corresponding path program 1 times [2023-08-03 23:11:42,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:11:42,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417067129] [2023-08-03 23:11:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:11:42,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:11:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:11:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:11:42,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:11:42,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417067129] [2023-08-03 23:11:42,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417067129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:11:42,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652307493] [2023-08-03 23:11:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:11:42,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:11:42,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:11:42,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:11:42,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:11:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:11:42,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:11:42,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:11:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:11:42,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:11:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:11:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652307493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:11:42,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:11:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:11:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803745858] [2023-08-03 23:11:42,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:11:42,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:11:42,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:11:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:11:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:11:42,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 284 [2023-08-03 23:11:42,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:11:42,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:11:42,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 284 [2023-08-03 23:11:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:24,609 INFO L124 PetriNetUnfolderBase]: 329434/427330 cut-off events. [2023-08-03 23:12:24,609 INFO L125 PetriNetUnfolderBase]: For 18600/18600 co-relation queries the response was YES. [2023-08-03 23:12:26,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859442 conditions, 427330 events. 329434/427330 cut-off events. For 18600/18600 co-relation queries the response was YES. Maximal size of possible extension queue 12519. Compared 2903959 event pairs, 211072 based on Foata normal form. 4/382053 useless extension candidates. Maximal degree in co-relation 224703. Up to 408313 conditions per place. [2023-08-03 23:12:27,726 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 51 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-03 23:12:27,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 289 flow [2023-08-03 23:12:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:12:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:12:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-03 23:12:27,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369718309859155 [2023-08-03 23:12:27,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-03 23:12:27,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-03 23:12:27,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:27,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-03 23:12:27,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:27,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:27,733 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:27,733 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 168 flow. Second operand 4 states and 610 transitions. [2023-08-03 23:12:27,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 289 flow [2023-08-03 23:12:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:12:27,736 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 163 flow [2023-08-03 23:12:27,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-03 23:12:27,737 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:12:27,737 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 163 flow [2023-08-03 23:12:27,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:27,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:27,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:27,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:12:27,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:27,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:27,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1779844157, now seen corresponding path program 1 times [2023-08-03 23:12:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:27,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682197045] [2023-08-03 23:12:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:12:28,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:28,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682197045] [2023-08-03 23:12:28,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682197045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:12:28,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129409941] [2023-08-03 23:12:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:28,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:12:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:28,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:12:28,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:12:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:28,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:12:28,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:12:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:12:28,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:12:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129409941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:12:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:12:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461640154] [2023-08-03 23:12:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:12:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:12:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:12:28,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 284 [2023-08-03 23:12:28,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:28,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:28,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 284 [2023-08-03 23:12:28,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:11,267 INFO L124 PetriNetUnfolderBase]: 326914/427599 cut-off events. [2023-08-03 23:13:11,267 INFO L125 PetriNetUnfolderBase]: For 15551/15551 co-relation queries the response was YES. [2023-08-03 23:13:12,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857356 conditions, 427599 events. 326914/427599 cut-off events. For 15551/15551 co-relation queries the response was YES. Maximal size of possible extension queue 12770. Compared 2981738 event pairs, 85162 based on Foata normal form. 784/382366 useless extension candidates. Maximal degree in co-relation 409097. Up to 401224 conditions per place. [2023-08-03 23:13:14,572 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 78 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-03 23:13:14,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 401 flow [2023-08-03 23:13:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:13:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:13:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 777 transitions. [2023-08-03 23:13:14,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471830985915493 [2023-08-03 23:13:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 777 transitions. [2023-08-03 23:13:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 777 transitions. [2023-08-03 23:13:14,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:14,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 777 transitions. [2023-08-03 23:13:14,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.4) internal successors, (777), 5 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:14,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:14,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 284.0) internal successors, (1704), 6 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:14,580 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 163 flow. Second operand 5 states and 777 transitions. [2023-08-03 23:13:14,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 401 flow [2023-08-03 23:13:14,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:13:14,591 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 173 flow [2023-08-03 23:13:14,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-03 23:13:14,592 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-03 23:13:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 173 flow [2023-08-03 23:13:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:14,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:13:14,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:14,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:14,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:14,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1332609626, now seen corresponding path program 1 times [2023-08-03 23:13:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:14,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277657947] [2023-08-03 23:13:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:14,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277657947] [2023-08-03 23:13:14,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277657947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972720536] [2023-08-03 23:13:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:14,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:14,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:13:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:14,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:13:14,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:15,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:13:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972720536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:13:15,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:13:15,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:13:15,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370035854] [2023-08-03 23:13:15,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:13:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:15,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 284 [2023-08-03 23:13:15,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:15,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:15,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 284 [2023-08-03 23:13:15,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:53,206 INFO L124 PetriNetUnfolderBase]: 293834/382199 cut-off events. [2023-08-03 23:13:53,206 INFO L125 PetriNetUnfolderBase]: For 18713/18713 co-relation queries the response was YES. [2023-08-03 23:13:54,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769032 conditions, 382199 events. 293834/382199 cut-off events. For 18713/18713 co-relation queries the response was YES. Maximal size of possible extension queue 12122. Compared 2596930 event pairs, 175658 based on Foata normal form. 112/340790 useless extension candidates. Maximal degree in co-relation 367317. Up to 358713 conditions per place. [2023-08-03 23:13:55,854 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 72 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-03 23:13:55,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 379 flow [2023-08-03 23:13:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 631 transitions. [2023-08-03 23:13:55,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5554577464788732 [2023-08-03 23:13:55,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 631 transitions. [2023-08-03 23:13:55,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 631 transitions. [2023-08-03 23:13:55,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:55,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 631 transitions. [2023-08-03 23:13:55,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:55,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:55,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:55,860 INFO L175 Difference]: Start difference. First operand has 75 places, 53 transitions, 173 flow. Second operand 4 states and 631 transitions. [2023-08-03 23:13:55,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 379 flow [2023-08-03 23:13:55,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 374 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:55,864 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 166 flow [2023-08-03 23:13:55,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2023-08-03 23:13:55,864 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-03 23:13:55,865 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 166 flow [2023-08-03 23:13:55,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:55,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:55,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:55,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:13:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:56,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:56,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash -742243954, now seen corresponding path program 1 times [2023-08-03 23:13:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:56,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351800097] [2023-08-03 23:13:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:13:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:56,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351800097] [2023-08-03 23:13:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351800097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:56,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:13:56,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:13:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039557101] [2023-08-03 23:13:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:13:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:13:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:13:56,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 284 [2023-08-03 23:13:56,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:56,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:56,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 284 [2023-08-03 23:13:56,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:16,673 INFO L124 PetriNetUnfolderBase]: 156074/207559 cut-off events. [2023-08-03 23:14:16,673 INFO L125 PetriNetUnfolderBase]: For 12597/12597 co-relation queries the response was YES. [2023-08-03 23:14:17,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424600 conditions, 207559 events. 156074/207559 cut-off events. For 12597/12597 co-relation queries the response was YES. Maximal size of possible extension queue 6412. Compared 1380359 event pairs, 5154 based on Foata normal form. 28224/211734 useless extension candidates. Maximal degree in co-relation 202157. Up to 166208 conditions per place. [2023-08-03 23:14:17,530 INFO L140 encePairwiseOnDemand]: 282/284 looper letters, 0 selfloop transitions, 0 changer transitions 92/92 dead transitions. [2023-08-03 23:14:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 414 flow [2023-08-03 23:14:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:14:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:14:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-08-03 23:14:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669014084507042 [2023-08-03 23:14:17,532 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-08-03 23:14:17,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-08-03 23:14:17,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:17,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-08-03 23:14:17,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:17,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:17,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:17,535 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 166 flow. Second operand 4 states and 644 transitions. [2023-08-03 23:14:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 414 flow [2023-08-03 23:14:21,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 407 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:14:21,552 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:21,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-03 23:14:21,552 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:14:21,552 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:21,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:21,553 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:14:21,553 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:14:21,553 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:14:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:14:21,554 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:21,554 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:14:21,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 178 transitions, 392 flow [2023-08-03 23:14:21,821 INFO L124 PetriNetUnfolderBase]: 93/1441 cut-off events. [2023-08-03 23:14:21,821 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:14:21,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1539 conditions, 1441 events. 93/1441 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9927 event pairs, 0 based on Foata normal form. 0/1258 useless extension candidates. Maximal degree in co-relation 1046. Up to 54 conditions per place. [2023-08-03 23:14:21,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 178 transitions, 392 flow [2023-08-03 23:14:21,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 177 transitions, 386 flow [2023-08-03 23:14:21,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:14:21,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 177 transitions, 386 flow [2023-08-03 23:14:21,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 177 transitions, 386 flow [2023-08-03 23:14:21,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 177 transitions, 386 flow [2023-08-03 23:14:21,969 INFO L124 PetriNetUnfolderBase]: 93/1440 cut-off events. [2023-08-03 23:14:21,969 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-03 23:14:21,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 1440 events. 93/1440 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9905 event pairs, 0 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 1043. Up to 54 conditions per place. [2023-08-03 23:14:22,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 7472 [2023-08-03 23:14:26,499 INFO L134 LiptonReduction]: Checked pairs total: 26555 [2023-08-03 23:14:26,499 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-03 23:14:26,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:14:26,501 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;@689016fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:14:26,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 23:14:26,504 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:14:26,504 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-03 23:14:26,504 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:14:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:14:26,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-03 23:14:26,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1149006180, now seen corresponding path program 1 times [2023-08-03 23:14:26,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:26,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21150700] [2023-08-03 23:14:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:14:26,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:26,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21150700] [2023-08-03 23:14:26,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21150700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:14:26,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:14:26,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:14:26,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709192499] [2023-08-03 23:14:26,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:14:26,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:14:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:14:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:14:26,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 315 [2023-08-03 23:14:26,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:26,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:26,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 315 [2023-08-03 23:14:26,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand