/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_safe000_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:00:17,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:00:17,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:00:17,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:00:17,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:00:17,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:00:17,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:00:17,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:00:17,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:00:17,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:00:17,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:00:17,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:00:17,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:00:17,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:00:17,843 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:00:17,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:00:17,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:00:17,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:00:17,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:00:17,845 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:00:17,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:00:17,846 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:00:17,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:00:17,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:00:17,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:00:17,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:00:17,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:00:17,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:00:17,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:00:17,848 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:00:18,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:00:18,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:00:18,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:00:18,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:00:18,098 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:00:18,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_rmo_bound2.i [2023-08-04 00:00:19,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:00:19,532 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:00:19,533 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_rmo_bound2.i [2023-08-04 00:00:19,544 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4333a1aa3/40bbf0e9beda45dba7226dea4254a966/FLAG5e1b1090f [2023-08-04 00:00:19,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4333a1aa3/40bbf0e9beda45dba7226dea4254a966 [2023-08-04 00:00:19,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:00:19,560 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:00:19,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:00:19,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:00:19,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:00:19,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:00:19" (1/1) ... [2023-08-04 00:00:19,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f361b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:19, skipping insertion in model container [2023-08-04 00:00:19,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:00:19" (1/1) ... [2023-08-04 00:00:19,604 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:00:19,717 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_safe000_rmo_bound2.i[988,1001] [2023-08-04 00:00:19,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:00:19,939 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:00:19,951 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_safe000_rmo_bound2.i[988,1001] [2023-08-04 00:00:19,968 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:00:19,969 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:00:20,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:00:20,088 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:00:20,089 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:00:20,093 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:00:20,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20 WrapperNode [2023-08-04 00:00:20,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:00:20,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:00:20,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:00:20,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:00:20,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,134 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,194 INFO L138 Inliner]: procedures = 176, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 194 [2023-08-04 00:00:20,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:00:20,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:00:20,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:00:20,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:00:20,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:00:20,243 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:00:20,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:00:20,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:00:20,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (1/1) ... [2023-08-04 00:00:20,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:00:20,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:20,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:00:20,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:00:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:00:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:00:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:00:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:00:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:00:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:00:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:00:20,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:00:20,359 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:00:20,549 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:00:20,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:00:21,031 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:00:21,245 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:00:21,245 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:00:21,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:00:21 BoogieIcfgContainer [2023-08-04 00:00:21,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:00:21,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:00:21,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:00:21,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:00:21,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:00:19" (1/3) ... [2023-08-04 00:00:21,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4ba65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:00:21, skipping insertion in model container [2023-08-04 00:00:21,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:00:20" (2/3) ... [2023-08-04 00:00:21,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4ba65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:00:21, skipping insertion in model container [2023-08-04 00:00:21,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:00:21" (3/3) ... [2023-08-04 00:00:21,258 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe000_rmo_bound2.i [2023-08-04 00:00:21,265 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:00:21,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:00:21,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:00:21,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:00:21,340 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:00:21,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 00:00:21,475 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 00:00:21,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:00:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1955 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 00:00:21,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 00:00:21,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 00:00:21,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:00:21,496 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 00:00:21,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 00:00:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 00:00:21,525 INFO L124 PetriNetUnfolderBase]: 6/233 cut-off events. [2023-08-04 00:00:21,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:00:21,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 6/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-04 00:00:21,529 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 00:00:25,784 INFO L134 LiptonReduction]: Checked pairs total: 3622 [2023-08-04 00:00:25,785 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 00:00:25,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:00:25,810 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;@985c4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:00:25,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:00:25,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:00:25,814 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:00:25,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:00:25,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:25,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:00:25,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:25,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 87762835, now seen corresponding path program 1 times [2023-08-04 00:00:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:25,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347419154] [2023-08-04 00:00:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:00:25,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:00:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:00:25,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:00:25,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:00:25,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:00:25,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:00:26,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:00:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:00:26,000 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:00:26,005 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:00:26,006 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:00:26,006 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:00:26,047 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:00:26,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 00:00:26,230 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-04 00:00:26,230 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:00:26,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9449 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-04 00:00:26,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 00:00:26,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 140 transitions, 316 flow [2023-08-04 00:00:26,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:00:26,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 140 transitions, 316 flow [2023-08-04 00:00:26,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 140 transitions, 316 flow [2023-08-04 00:00:26,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 140 transitions, 316 flow [2023-08-04 00:00:26,291 INFO L124 PetriNetUnfolderBase]: 12/609 cut-off events. [2023-08-04 00:00:26,291 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:00:26,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 609 events. 12/609 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2989 event pairs, 0 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 493. Up to 27 conditions per place. [2023-08-04 00:00:26,300 INFO L119 LiptonReduction]: Number of co-enabled transitions 3388 [2023-08-04 00:00:30,278 INFO L134 LiptonReduction]: Checked pairs total: 12124 [2023-08-04 00:00:30,282 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 00:00:30,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:00:30,289 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;@985c4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:00:30,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:00:30,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:00:30,295 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-04 00:00:30,295 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:00:30,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:30,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:30,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:30,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1923534069, now seen corresponding path program 1 times [2023-08-04 00:00:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:30,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463424726] [2023-08-04 00:00:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:00:30,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:30,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463424726] [2023-08-04 00:00:30,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463424726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:30,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:00:30,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:00:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231319194] [2023-08-04 00:00:30,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:30,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:00:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:00:30,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:00:30,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-04 00:00:30,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:30,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:30,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-04 00:00:30,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:36,693 INFO L124 PetriNetUnfolderBase]: 36860/51126 cut-off events. [2023-08-04 00:00:36,694 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2023-08-04 00:00:36,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103397 conditions, 51126 events. 36860/51126 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 336139 event pairs, 29454 based on Foata normal form. 0/50480 useless extension candidates. Maximal degree in co-relation 29522. Up to 47970 conditions per place. [2023-08-04 00:00:37,410 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 00:00:37,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 196 flow [2023-08-04 00:00:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:00:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:00:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-04 00:00:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2023-08-04 00:00:37,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-04 00:00:37,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-04 00:00:37,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:37,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-04 00:00:37,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:37,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:37,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:37,449 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 120 flow. Second operand 3 states and 464 transitions. [2023-08-04 00:00:37,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 196 flow [2023-08-04 00:00:37,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 190 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:00:37,461 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 126 flow [2023-08-04 00:00:37,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-04 00:00:37,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-04 00:00:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 126 flow [2023-08-04 00:00:37,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:37,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:37,476 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:00:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:00:37,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:37,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 86639756, now seen corresponding path program 1 times [2023-08-04 00:00:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946510587] [2023-08-04 00:00:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:00:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946510587] [2023-08-04 00:00:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946510587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517822927] [2023-08-04 00:00:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:37,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:37,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:37,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:37,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:00:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:37,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:00:37,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:00:37,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:00:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517822927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:37,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:00:37,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:00:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170192209] [2023-08-04 00:00:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:00:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:00:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:00:37,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 272 [2023-08-04 00:00:37,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:37,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 272 [2023-08-04 00:00:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:44,257 INFO L124 PetriNetUnfolderBase]: 36848/51081 cut-off events. [2023-08-04 00:00:44,257 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-04 00:00:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103067 conditions, 51081 events. 36848/51081 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 1650. Compared 334517 event pairs, 23904 based on Foata normal form. 9/50489 useless extension candidates. Maximal degree in co-relation 36811. Up to 47923 conditions per place. [2023-08-04 00:00:44,605 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 35 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-04 00:00:44,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 218 flow [2023-08-04 00:00:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:00:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:00:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-04 00:00:44,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514705882352942 [2023-08-04 00:00:44,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-04 00:00:44,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-04 00:00:44,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:44,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-04 00:00:44,613 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) [2023-08-04 00:00:44,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:44,616 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:44,616 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 126 flow. Second operand 5 states and 750 transitions. [2023-08-04 00:00:44,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 218 flow [2023-08-04 00:00:44,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:00:44,619 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 140 flow [2023-08-04 00:00:44,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-04 00:00:44,620 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-04 00:00:44,620 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 140 flow [2023-08-04 00:00:44,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:44,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:44,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:44,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:00:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:44,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:44,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1129182040, now seen corresponding path program 1 times [2023-08-04 00:00:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014908255] [2023-08-04 00:00:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:00:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014908255] [2023-08-04 00:00:44,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014908255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922916816] [2023-08-04 00:00:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:44,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:44,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:44,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:00:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:45,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:00:45,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:00:45,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:00:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922916816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:45,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:00:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:00:45,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437910675] [2023-08-04 00:00:45,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:00:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:00:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:00:45,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-04 00:00:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-04 00:00:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:51,745 INFO L124 PetriNetUnfolderBase]: 35806/49624 cut-off events. [2023-08-04 00:00:51,745 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-04 00:00:51,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100283 conditions, 49624 events. 35806/49624 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 324841 event pairs, 27838 based on Foata normal form. 0/48603 useless extension candidates. Maximal degree in co-relation 28704. Up to 46264 conditions per place. [2023-08-04 00:00:52,086 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 38 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 00:00:52,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 240 flow [2023-08-04 00:00:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:00:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:00:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 00:00:52,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747549019607843 [2023-08-04 00:00:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 00:00:52,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 00:00:52,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:52,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 00:00:52,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:52,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:52,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:52,093 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 140 flow. Second operand 3 states and 469 transitions. [2023-08-04 00:00:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 240 flow [2023-08-04 00:00:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 233 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:00:52,095 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 148 flow [2023-08-04 00:00:52,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-04 00:00:52,100 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-04 00:00:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 148 flow [2023-08-04 00:00:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:52,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:52,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:52,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:00:52,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 00:00:52,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:52,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1457403554, now seen corresponding path program 1 times [2023-08-04 00:00:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:52,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410691707] [2023-08-04 00:00:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:52,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:00:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410691707] [2023-08-04 00:00:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410691707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038592838] [2023-08-04 00:00:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:52,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:52,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:52,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:00:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:52,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:00:52,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:00:52,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:00:52,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038592838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:52,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:52,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:00:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473606424] [2023-08-04 00:00:52,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:00:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:00:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:00:52,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 272 [2023-08-04 00:00:52,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:52,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:52,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 272 [2023-08-04 00:00:52,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:57,426 INFO L124 PetriNetUnfolderBase]: 28183/38768 cut-off events. [2023-08-04 00:00:57,426 INFO L125 PetriNetUnfolderBase]: For 2628/2628 co-relation queries the response was YES. [2023-08-04 00:00:57,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78498 conditions, 38768 events. 28183/38768 cut-off events. For 2628/2628 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 242066 event pairs, 17577 based on Foata normal form. 3/38293 useless extension candidates. Maximal degree in co-relation 27911. Up to 36121 conditions per place. [2023-08-04 00:00:57,695 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-04 00:00:57,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 233 flow [2023-08-04 00:00:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:00:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:00:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 607 transitions. [2023-08-04 00:00:57,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579044117647058 [2023-08-04 00:00:57,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 607 transitions. [2023-08-04 00:00:57,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 607 transitions. [2023-08-04 00:00:57,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:57,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 607 transitions. [2023-08-04 00:00:57,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:57,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:57,701 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:57,701 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 148 flow. Second operand 4 states and 607 transitions. [2023-08-04 00:00:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 233 flow [2023-08-04 00:00:57,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:00:57,704 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 143 flow [2023-08-04 00:00:57,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:00:57,705 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:00:57,705 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 143 flow [2023-08-04 00:00:57,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:57,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:57,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:57,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:00:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:57,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:00:57,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1029739214, now seen corresponding path program 1 times [2023-08-04 00:00:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133098389] [2023-08-04 00:00:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:00:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133098389] [2023-08-04 00:00:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133098389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:58,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853998097] [2023-08-04 00:00:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:58,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:58,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:00:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:58,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:00:58,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:00:58,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:00:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853998097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:58,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:00:58,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:00:58,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973262665] [2023-08-04 00:00:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:58,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:00:58,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:00:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:00:58,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 272 [2023-08-04 00:00:58,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:58,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:58,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 272 [2023-08-04 00:00:58,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:03,203 INFO L124 PetriNetUnfolderBase]: 27775/38401 cut-off events. [2023-08-04 00:01:03,211 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-04 00:01:03,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77637 conditions, 38401 events. 27775/38401 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 1382. Compared 244344 event pairs, 7042 based on Foata normal form. 144/38175 useless extension candidates. Maximal degree in co-relation 27590. Up to 34755 conditions per place. [2023-08-04 00:01:03,494 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-04 00:01:03,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 297 flow [2023-08-04 00:01:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:01:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:01:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 765 transitions. [2023-08-04 00:01:03,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-04 00:01:03,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 765 transitions. [2023-08-04 00:01:03,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 765 transitions. [2023-08-04 00:01:03,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:03,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 765 transitions. [2023-08-04 00:01:03,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:03,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:03,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:03,502 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 143 flow. Second operand 5 states and 765 transitions. [2023-08-04 00:01:03,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 297 flow [2023-08-04 00:01:03,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 290 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:01:03,506 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 153 flow [2023-08-04 00:01:03,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-04 00:01:03,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-04 00:01:03,509 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 153 flow [2023-08-04 00:01:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:03,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:03,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:03,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 00:01:03,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:03,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:01:03,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:03,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1674294784, now seen corresponding path program 1 times [2023-08-04 00:01:03,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:03,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018737794] [2023-08-04 00:01:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:03,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:01:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018737794] [2023-08-04 00:01:03,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018737794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:01:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932223653] [2023-08-04 00:01:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:03,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:03,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:01:03,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:01:03,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:01:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:03,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:01:03,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:01:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:01:03,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:01:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:01:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932223653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:01:03,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:01:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:01:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808686266] [2023-08-04 00:01:03,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:01:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:01:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:01:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:01:03,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 272 [2023-08-04 00:01:03,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:03,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:03,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 272 [2023-08-04 00:01:03,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:07,747 INFO L124 PetriNetUnfolderBase]: 23296/31906 cut-off events. [2023-08-04 00:01:07,772 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2023-08-04 00:01:07,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65049 conditions, 31906 events. 23296/31906 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 194287 event pairs, 13702 based on Foata normal form. 36/31644 useless extension candidates. Maximal degree in co-relation 23067. Up to 28852 conditions per place. [2023-08-04 00:01:07,945 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 00:01:07,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 283 flow [2023-08-04 00:01:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:01:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:01:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-08-04 00:01:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680147058823529 [2023-08-04 00:01:07,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-08-04 00:01:07,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-08-04 00:01:07,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:07,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-08-04 00:01:07,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:07,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:07,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:07,999 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 153 flow. Second operand 4 states and 618 transitions. [2023-08-04 00:01:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 283 flow [2023-08-04 00:01:08,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 278 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:01:08,003 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 146 flow [2023-08-04 00:01:08,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-04 00:01:08,004 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-04 00:01:08,004 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 146 flow [2023-08-04 00:01:08,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:08,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:08,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:08,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:01:08,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:08,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:01:08,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 482852413, now seen corresponding path program 1 times [2023-08-04 00:01:08,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:08,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056559220] [2023-08-04 00:01:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:01:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056559220] [2023-08-04 00:01:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056559220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:01:08,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:01:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:01:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610500221] [2023-08-04 00:01:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:01:08,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:01:08,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:01:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:01:08,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-04 00:01:08,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:08,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:08,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-04 00:01:08,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:10,805 INFO L124 PetriNetUnfolderBase]: 13312/18943 cut-off events. [2023-08-04 00:01:10,806 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2023-08-04 00:01:10,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39402 conditions, 18943 events. 13312/18943 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 114577 event pairs, 952 based on Foata normal form. 2304/21237 useless extension candidates. Maximal degree in co-relation 15389. Up to 13200 conditions per place. [2023-08-04 00:01:10,856 INFO L140 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-04 00:01:10,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 298 flow [2023-08-04 00:01:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:01:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:01:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2023-08-04 00:01:10,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753676470588235 [2023-08-04 00:01:10,858 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2023-08-04 00:01:10,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2023-08-04 00:01:10,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:10,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2023-08-04 00:01:10,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:10,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:10,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:10,861 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 146 flow. Second operand 4 states and 626 transitions. [2023-08-04 00:01:10,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 298 flow [2023-08-04 00:01:10,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:01:10,936 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 00:01:10,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 00:01:10,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:01:10,937 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 00:01:10,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:10,938 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:01:10,938 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:01:10,938 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:01:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 00:01:10,938 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:10,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:01:10,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 00:01:11,031 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-04 00:01:11,031 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:01:11,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9449 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-04 00:01:11,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 00:01:11,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 154 transitions, 332 flow [2023-08-04 00:01:11,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:01:11,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 154 transitions, 332 flow [2023-08-04 00:01:11,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 154 transitions, 332 flow [2023-08-04 00:01:11,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 154 transitions, 332 flow [2023-08-04 00:01:11,110 INFO L124 PetriNetUnfolderBase]: 66/1055 cut-off events. [2023-08-04 00:01:11,110 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:01:11,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 1055 events. 66/1055 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6572 event pairs, 0 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 787. Up to 54 conditions per place. [2023-08-04 00:01:11,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 00:01:18,061 INFO L134 LiptonReduction]: Checked pairs total: 14563 [2023-08-04 00:01:18,061 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 00:01:18,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:01:18,063 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;@985c4eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:01:18,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:01:18,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:01:18,066 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 00:01:18,066 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:01:18,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:18,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:01:18,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:01:18,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -633308175, now seen corresponding path program 1 times [2023-08-04 00:01:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394243848] [2023-08-04 00:01:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:18,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:01:18,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:18,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394243848] [2023-08-04 00:01:18,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394243848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:01:18,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:01:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:01:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539319070] [2023-08-04 00:01:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:01:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:01:18,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:01:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:01:18,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 00:01:18,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:18,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:18,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 00:01:18,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:39,573 INFO L124 PetriNetUnfolderBase]: 115988/155673 cut-off events. [2023-08-04 00:01:39,573 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2023-08-04 00:01:39,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307658 conditions, 155673 events. 115988/155673 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 4379. Compared 1046962 event pairs, 94470 based on Foata normal form. 0/149555 useless extension candidates. Maximal degree in co-relation 88201. Up to 148266 conditions per place. [2023-08-04 00:01:40,391 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:01:40,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 194 flow [2023-08-04 00:01:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:01:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:01:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 00:01:40,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2023-08-04 00:01:40,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 00:01:40,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 00:01:40,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:40,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 00:01:40,394 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) [2023-08-04 00:01:40,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:40,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:40,395 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 110 flow. Second operand 3 states and 468 transitions. [2023-08-04 00:01:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 194 flow [2023-08-04 00:01:40,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:01:40,396 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 122 flow [2023-08-04 00:01:40,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-04 00:01:40,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 00:01:40,397 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 122 flow [2023-08-04 00:01:40,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:40,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:40,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:01:40,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:01:40,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:40,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1784302717, now seen corresponding path program 1 times [2023-08-04 00:01:40,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:40,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963109302] [2023-08-04 00:01:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:01:40,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:40,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963109302] [2023-08-04 00:01:40,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963109302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:01:40,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025120758] [2023-08-04 00:01:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:40,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:01:40,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:01:40,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:01:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:40,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:01:40,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:01:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:01:40,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:01:40,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025120758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:01:40,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:01:40,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:01:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247789549] [2023-08-04 00:01:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:01:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:01:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:01:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:01:40,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 00:01:40,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:40,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:40,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 00:01:40,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:59,764 INFO L124 PetriNetUnfolderBase]: 112474/151468 cut-off events. [2023-08-04 00:01:59,765 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 00:02:00,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298301 conditions, 151468 events. 112474/151468 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4424. Compared 1029162 event pairs, 89386 based on Foata normal form. 0/146079 useless extension candidates. Maximal degree in co-relation 298264. Up to 143101 conditions per place. [2023-08-04 00:02:00,674 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 42 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 00:02:00,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 228 flow [2023-08-04 00:02:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:02:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:02:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-04 00:02:00,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532163742690058 [2023-08-04 00:02:00,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-04 00:02:00,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-04 00:02:00,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:00,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-04 00:02:00,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:00,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:00,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:00,679 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 122 flow. Second operand 3 states and 473 transitions. [2023-08-04 00:02:00,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 228 flow [2023-08-04 00:02:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 53 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:02:00,680 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 132 flow [2023-08-04 00:02:00,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 00:02:00,681 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2023-08-04 00:02:00,682 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 132 flow [2023-08-04 00:02:00,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:00,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:00,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:00,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:00,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:00,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:02:00,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1338552727, now seen corresponding path program 1 times [2023-08-04 00:02:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:00,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553305493] [2023-08-04 00:02:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:02:00,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553305493] [2023-08-04 00:02:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553305493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879745905] [2023-08-04 00:02:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:00,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:00,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:00,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:00,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:02:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:01,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:02:01,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:02:01,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:02:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879745905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:02:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:02:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045554909] [2023-08-04 00:02:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:02:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:02:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:01,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 00:02:01,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:01,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:01,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 00:02:01,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:20,213 INFO L124 PetriNetUnfolderBase]: 110662/148366 cut-off events. [2023-08-04 00:02:20,214 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 00:02:20,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293205 conditions, 148366 events. 110662/148366 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4438. Compared 1001181 event pairs, 86158 based on Foata normal form. 0/143550 useless extension candidates. Maximal degree in co-relation 84368. Up to 135661 conditions per place. [2023-08-04 00:02:21,271 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 00:02:21,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 264 flow [2023-08-04 00:02:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:02:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:02:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 00:02:21,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560233918128655 [2023-08-04 00:02:21,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 00:02:21,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 00:02:21,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:21,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 00:02:21,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:21,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:21,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:21,275 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 132 flow. Second operand 3 states and 479 transitions. [2023-08-04 00:02:21,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 264 flow [2023-08-04 00:02:21,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:02:21,279 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 142 flow [2023-08-04 00:02:21,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-08-04 00:02:21,293 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2023-08-04 00:02:21,293 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 142 flow [2023-08-04 00:02:21,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:21,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:21,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:21,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 00:02:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:21,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:02:21,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1774693688, now seen corresponding path program 1 times [2023-08-04 00:02:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557889223] [2023-08-04 00:02:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:21,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:02:21,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557889223] [2023-08-04 00:02:21,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557889223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257337564] [2023-08-04 00:02:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:21,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:21,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:02:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:21,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:02:21,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:02:21,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:02:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:02:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257337564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:02:21,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:02:21,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:02:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825422480] [2023-08-04 00:02:21,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:02:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:02:21,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:02:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:21,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-04 00:02:21,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:21,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:21,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-04 00:02:21,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand