/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:10:51,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:10:51,940 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:10:51,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:10:51,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:10:51,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:10:51,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:10:51,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:10:51,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:10:51,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:10:51,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:10:51,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:10:51,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:10:51,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:10:51,983 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:10:51,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:10:51,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:10:51,984 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:10:51,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:10:51,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:10:51,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:10:51,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:10:51,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:10:51,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:10:51,990 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:10:51,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:10:51,991 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:10:51,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:10:51,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:10:51,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:10:51,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:10:51,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:10:51,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:10:51,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:10:51,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:10:51,994 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:10:51,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:10:52,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:10:52,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:10:52,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:10:52,238 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:10:52,239 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:10:52,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_rmo.opt_bound2.i [2023-08-03 18:10:53,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:10:53,728 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:10:53,729 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_rmo.opt_bound2.i [2023-08-03 18:10:53,743 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bc17a19/9e8e11a0422a4ec99ee3cf4c8037fde6/FLAG0a37b02d4 [2023-08-03 18:10:53,756 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bc17a19/9e8e11a0422a4ec99ee3cf4c8037fde6 [2023-08-03 18:10:53,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:10:53,760 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:10:53,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:10:53,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:10:53,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:10:53,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:10:53" (1/1) ... [2023-08-03 18:10:53,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408a4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:53, skipping insertion in model container [2023-08-03 18:10:53,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:10:53" (1/1) ... [2023-08-03 18:10:53,810 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:10:53,941 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_safe009_rmo.opt_bound2.i[949,962] [2023-08-03 18:10:54,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:10:54,134 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:10:54,148 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_safe009_rmo.opt_bound2.i[949,962] [2023-08-03 18:10:54,156 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:10:54,157 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:10:54,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:10:54,222 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:10:54,223 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:10:54,229 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:10:54,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54 WrapperNode [2023-08-03 18:10:54,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:10:54,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:10:54,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:10:54,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:10:54,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,308 INFO L138 Inliner]: procedures = 176, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 160 [2023-08-03 18:10:54,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:10:54,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:10:54,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:10:54,309 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:10:54,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,343 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:10:54,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:10:54,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:10:54,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:10:54,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (1/1) ... [2023-08-03 18:10:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:10:54,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:10:54,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 18:10:54,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 18:10:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:10:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:10:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:10:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:10:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:10:54,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:10:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:10:54,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:10:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:10:54,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:10:54,457 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:10:54,458 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:10:54,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:10:54,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:10:54,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:10:54,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:10:54,460 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:10:54,640 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:10:54,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:10:55,017 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:10:55,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:10:55,282 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:10:55,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:10:55 BoogieIcfgContainer [2023-08-03 18:10:55,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:10:55,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:10:55,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:10:55,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:10:55,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:10:53" (1/3) ... [2023-08-03 18:10:55,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:10:55, skipping insertion in model container [2023-08-03 18:10:55,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:10:54" (2/3) ... [2023-08-03 18:10:55,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:10:55, skipping insertion in model container [2023-08-03 18:10:55,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:10:55" (3/3) ... [2023-08-03 18:10:55,297 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe009_rmo.opt_bound2.i [2023-08-03 18:10:55,304 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:10:55,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:10:55,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:10:55,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:10:55,390 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:10:55,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:10:55,635 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-03 18:10:55,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:10:55,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1934 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 18:10:55,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:10:55,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 133 transitions, 281 flow [2023-08-03 18:10:55,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:10:55,676 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:10:55,679 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:10:55,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 281 flow [2023-08-03 18:10:55,721 INFO L124 PetriNetUnfolderBase]: 22/365 cut-off events. [2023-08-03 18:10:55,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:10:55,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 365 events. 22/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1386 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 238. Up to 16 conditions per place. [2023-08-03 18:10:55,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 1976 [2023-08-03 18:11:00,946 INFO L134 LiptonReduction]: Checked pairs total: 5410 [2023-08-03 18:11:00,947 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 18:11:00,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:11:00,963 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;@7ed37e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:11:00,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:11:00,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:11:00,968 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 18:11:00,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:11:00,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:11:00,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:11:00,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:11:00,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:11:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1245719985, now seen corresponding path program 1 times [2023-08-03 18:11:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:11:00,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655852459] [2023-08-03 18:11:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:11:00,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:11:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:11:01,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:11:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:11:01,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:11:01,137 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:11:01,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:11:01,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:11:01,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:11:01,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:11:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:11:01,140 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 18:11:01,143 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:11:01,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:11:01,182 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:11:01,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 18:11:01,340 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-03 18:11:01,340 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:11:01,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9260 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-03 18:11:01,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 18:11:01,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 156 transitions, 348 flow [2023-08-03 18:11:01,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:11:01,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 18:11:01,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 18:11:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 156 transitions, 348 flow [2023-08-03 18:11:01,461 INFO L124 PetriNetUnfolderBase]: 66/1051 cut-off events. [2023-08-03 18:11:01,462 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:11:01,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1051 events. 66/1051 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6488 event pairs, 0 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 791. Up to 54 conditions per place. [2023-08-03 18:11:01,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 4876 [2023-08-03 18:11:07,173 INFO L134 LiptonReduction]: Checked pairs total: 16695 [2023-08-03 18:11:07,173 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 18:11:07,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:11:07,176 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;@7ed37e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:11:07,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:11:07,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:11:07,181 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-03 18:11:07,181 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 18:11:07,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:11:07,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:11:07,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:11:07,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:11:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1701075267, now seen corresponding path program 1 times [2023-08-03 18:11:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:11:07,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958942382] [2023-08-03 18:11:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:11:07,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:11:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:11:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:11:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:11:07,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958942382] [2023-08-03 18:11:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958942382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:11:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:11:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:11:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3210624] [2023-08-03 18:11:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:11:07,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:11:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:11:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:11:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:11:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:11:07,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:07,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:11:07,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:11:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:11:49,027 INFO L124 PetriNetUnfolderBase]: 272349/350309 cut-off events. [2023-08-03 18:11:49,027 INFO L125 PetriNetUnfolderBase]: For 6800/6800 co-relation queries the response was YES. [2023-08-03 18:11:49,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703130 conditions, 350309 events. 272349/350309 cut-off events. For 6800/6800 co-relation queries the response was YES. Maximal size of possible extension queue 8469. Compared 2242325 event pairs, 218772 based on Foata normal form. 8820/340525 useless extension candidates. Maximal degree in co-relation 152048. Up to 343786 conditions per place. [2023-08-03 18:11:50,966 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2023-08-03 18:11:50,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 228 flow [2023-08-03 18:11:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:11:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:11:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-03 18:11:50,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-03 18:11:50,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-03 18:11:50,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-03 18:11:50,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:11:50,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-03 18:11:50,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:50,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:50,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:50,993 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 134 flow. Second operand 3 states and 471 transitions. [2023-08-03 18:11:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 228 flow [2023-08-03 18:11:51,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 222 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:11:51,014 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 136 flow [2023-08-03 18:11:51,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-03 18:11:51,018 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 18:11:51,019 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 136 flow [2023-08-03 18:11:51,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:51,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:11:51,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:11:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:11:51,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:11:51,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:11:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 781185420, now seen corresponding path program 1 times [2023-08-03 18:11:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:11:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341810592] [2023-08-03 18:11:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:11:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:11:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:11:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:11:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:11:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341810592] [2023-08-03 18:11:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341810592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:11:51,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:11:51,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 18:11:51,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348052599] [2023-08-03 18:11:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:11:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:11:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:11:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:11:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:11:51,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:11:51,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:11:51,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:11:51,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:11:51,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:12:24,516 INFO L124 PetriNetUnfolderBase]: 237738/306434 cut-off events. [2023-08-03 18:12:24,516 INFO L125 PetriNetUnfolderBase]: For 5304/5304 co-relation queries the response was YES. [2023-08-03 18:12:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614427 conditions, 306434 events. 237738/306434 cut-off events. For 5304/5304 co-relation queries the response was YES. Maximal size of possible extension queue 7396. Compared 1950662 event pairs, 153240 based on Foata normal form. 16/296710 useless extension candidates. Maximal degree in co-relation 161422. Up to 300296 conditions per place. [2023-08-03 18:12:26,348 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 45 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-03 18:12:26,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 254 flow [2023-08-03 18:12:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:12:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:12:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 18:12:26,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335689045936396 [2023-08-03 18:12:26,354 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 18:12:26,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 18:12:26,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:12:26,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 18:12:26,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:12:26,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:12:26,362 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:12:26,362 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 136 flow. Second operand 5 states and 755 transitions. [2023-08-03 18:12:26,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 254 flow [2023-08-03 18:12:26,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:12:26,365 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 150 flow [2023-08-03 18:12:26,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-03 18:12:26,366 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 18:12:26,366 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 150 flow [2023-08-03 18:12:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:12:26,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:12:26,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:12:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:12:26,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:12:26,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:12:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 960303213, now seen corresponding path program 1 times [2023-08-03 18:12:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:12:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661947939] [2023-08-03 18:12:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:12:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:12:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:12:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:12:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:12:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661947939] [2023-08-03 18:12:26,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661947939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:12:26,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449849137] [2023-08-03 18:12:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:12:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:12:26,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:12:26,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:12:26,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:12:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:12:26,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:12:26,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:12:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:12:26,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:12:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449849137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:12:26,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:12:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:12:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561000558] [2023-08-03 18:12:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:12:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:12:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:12:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:12:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:12:26,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:12:26,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:12:26,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:12:26,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:12:26,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:12:58,754 INFO L124 PetriNetUnfolderBase]: 230316/294217 cut-off events. [2023-08-03 18:12:58,754 INFO L125 PetriNetUnfolderBase]: For 4663/4663 co-relation queries the response was YES. [2023-08-03 18:12:59,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591911 conditions, 294217 events. 230316/294217 cut-off events. For 4663/4663 co-relation queries the response was YES. Maximal size of possible extension queue 7229. Compared 1836393 event pairs, 185514 based on Foata normal form. 0/284937 useless extension candidates. Maximal degree in co-relation 231965. Up to 289721 conditions per place. [2023-08-03 18:13:00,302 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 47 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-03 18:13:00,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 272 flow [2023-08-03 18:13:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:13:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:13:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-03 18:13:00,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594817432273262 [2023-08-03 18:13:00,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-03 18:13:00,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-03 18:13:00,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:13:00,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-03 18:13:00,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:00,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:00,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:00,310 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 150 flow. Second operand 3 states and 475 transitions. [2023-08-03 18:13:00,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 272 flow [2023-08-03 18:13:00,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 265 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:13:00,313 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 158 flow [2023-08-03 18:13:00,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 18:13:00,314 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 18:13:00,314 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 158 flow [2023-08-03 18:13:00,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:00,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:13:00,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:13:00,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 18:13:00,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:13:00,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:13:00,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:13:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1741922158, now seen corresponding path program 1 times [2023-08-03 18:13:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:13:00,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976031705] [2023-08-03 18:13:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:13:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:13:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:13:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:13:00,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:13:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976031705] [2023-08-03 18:13:00,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976031705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:13:00,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728159933] [2023-08-03 18:13:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:13:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:13:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:13:00,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:13:00,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:13:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:13:00,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:13:00,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:13:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:13:00,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:13:00,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728159933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:13:00,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:13:00,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:13:00,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226340036] [2023-08-03 18:13:00,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:13:00,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:13:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:13:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:13:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:13:00,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:13:00,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:00,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:13:00,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:13:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:13:33,533 INFO L124 PetriNetUnfolderBase]: 225996/288441 cut-off events. [2023-08-03 18:13:33,534 INFO L125 PetriNetUnfolderBase]: For 2775/2775 co-relation queries the response was YES. [2023-08-03 18:13:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581075 conditions, 288441 events. 225996/288441 cut-off events. For 2775/2775 co-relation queries the response was YES. Maximal size of possible extension queue 7265. Compared 1770604 event pairs, 178716 based on Foata normal form. 0/280041 useless extension candidates. Maximal degree in co-relation 227757. Up to 275203 conditions per place. [2023-08-03 18:13:35,044 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 55 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-03 18:13:35,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 306 flow [2023-08-03 18:13:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:13:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:13:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-03 18:13:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665488810365136 [2023-08-03 18:13:35,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-03 18:13:35,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-03 18:13:35,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:13:35,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-03 18:13:35,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:35,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:35,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:35,050 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 158 flow. Second operand 3 states and 481 transitions. [2023-08-03 18:13:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 306 flow [2023-08-03 18:13:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:13:35,054 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 167 flow [2023-08-03 18:13:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-03 18:13:35,055 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-03 18:13:35,056 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 167 flow [2023-08-03 18:13:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:35,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:13:35,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:13:35,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 18:13:35,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:13:35,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:13:35,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:13:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1272691714, now seen corresponding path program 1 times [2023-08-03 18:13:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:13:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549814333] [2023-08-03 18:13:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:13:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:13:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:13:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:13:35,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:13:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549814333] [2023-08-03 18:13:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549814333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:13:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685998483] [2023-08-03 18:13:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:13:35,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:13:35,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:13:35,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:13:35,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:13:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:13:35,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:13:35,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:13:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:13:35,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:13:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:13:35,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685998483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:13:35,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:13:35,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 18:13:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796207698] [2023-08-03 18:13:35,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:13:35,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:13:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:13:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:13:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:13:35,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:13:35,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:13:35,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:13:35,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:13:35,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:14:02,299 INFO L124 PetriNetUnfolderBase]: 187770/237554 cut-off events. [2023-08-03 18:14:02,299 INFO L125 PetriNetUnfolderBase]: For 16976/16976 co-relation queries the response was YES. [2023-08-03 18:14:02,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492995 conditions, 237554 events. 187770/237554 cut-off events. For 16976/16976 co-relation queries the response was YES. Maximal size of possible extension queue 6308. Compared 1401677 event pairs, 118080 based on Foata normal form. 4/237238 useless extension candidates. Maximal degree in co-relation 129035. Up to 234201 conditions per place. [2023-08-03 18:14:03,579 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 47 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-03 18:14:03,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 281 flow [2023-08-03 18:14:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:14:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:14:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-08-03 18:14:03,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415194346289752 [2023-08-03 18:14:03,581 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-08-03 18:14:03,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-08-03 18:14:03,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:14:03,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-08-03 18:14:03,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:03,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:03,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:03,585 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 167 flow. Second operand 4 states and 613 transitions. [2023-08-03 18:14:03,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 281 flow [2023-08-03 18:14:03,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:14:03,601 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 163 flow [2023-08-03 18:14:03,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 18:14:03,601 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 18:14:03,602 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 163 flow [2023-08-03 18:14:03,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:03,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:14:03,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:14:03,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 18:14:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:03,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:14:03,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:14:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1224742505, now seen corresponding path program 1 times [2023-08-03 18:14:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:14:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958547602] [2023-08-03 18:14:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:14:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:14:03,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:14:03,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958547602] [2023-08-03 18:14:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958547602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:14:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518185284] [2023-08-03 18:14:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:03,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:03,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:14:03,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:14:03,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 18:14:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:04,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:14:04,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:14:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:14:04,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:14:04,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518185284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:14:04,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:14:04,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:14:04,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566359183] [2023-08-03 18:14:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:14:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:14:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:14:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:14:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:14:04,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:14:04,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 163 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) [2023-08-03 18:14:04,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:14:04,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:14:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:14:29,922 INFO L124 PetriNetUnfolderBase]: 187002/236279 cut-off events. [2023-08-03 18:14:29,923 INFO L125 PetriNetUnfolderBase]: For 14991/14991 co-relation queries the response was YES. [2023-08-03 18:14:30,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489389 conditions, 236279 events. 187002/236279 cut-off events. For 14991/14991 co-relation queries the response was YES. Maximal size of possible extension queue 6308. Compared 1391865 event pairs, 55722 based on Foata normal form. 256/236215 useless extension candidates. Maximal degree in co-relation 233093. Up to 231648 conditions per place. [2023-08-03 18:14:31,421 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 65 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-08-03 18:14:31,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 359 flow [2023-08-03 18:14:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:14:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:14:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 773 transitions. [2023-08-03 18:14:31,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462897526501767 [2023-08-03 18:14:31,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 773 transitions. [2023-08-03 18:14:31,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 773 transitions. [2023-08-03 18:14:31,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:14:31,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 773 transitions. [2023-08-03 18:14:31,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:31,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:31,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:31,428 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 163 flow. Second operand 5 states and 773 transitions. [2023-08-03 18:14:31,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 359 flow [2023-08-03 18:14:31,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 352 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:14:31,445 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 175 flow [2023-08-03 18:14:31,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-08-03 18:14:31,446 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-03 18:14:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 175 flow [2023-08-03 18:14:31,446 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) [2023-08-03 18:14:31,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:14:31,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:14:31,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 18:14:31,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:31,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:14:31,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:14:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -112848468, now seen corresponding path program 1 times [2023-08-03 18:14:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:14:31,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547705391] [2023-08-03 18:14:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:14:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:14:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:14:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547705391] [2023-08-03 18:14:31,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547705391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:14:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265195926] [2023-08-03 18:14:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:14:31,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:14:31,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 18:14:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:31,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:14:31,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:14:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:14:31,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:14:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:14:31,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265195926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:14:31,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:14:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:14:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473183920] [2023-08-03 18:14:31,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:14:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:14:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:14:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:14:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:14:31,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:14:31,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:31,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:14:31,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:14:31,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:14:53,836 INFO L124 PetriNetUnfolderBase]: 155418/195031 cut-off events. [2023-08-03 18:14:53,837 INFO L125 PetriNetUnfolderBase]: For 14093/14093 co-relation queries the response was YES. [2023-08-03 18:14:54,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404537 conditions, 195031 events. 155418/195031 cut-off events. For 14093/14093 co-relation queries the response was YES. Maximal size of possible extension queue 5749. Compared 1122258 event pairs, 99498 based on Foata normal form. 64/194839 useless extension candidates. Maximal degree in co-relation 192941. Up to 191065 conditions per place. [2023-08-03 18:14:54,843 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 59 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-03 18:14:54,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 335 flow [2023-08-03 18:14:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:14:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:14:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-03 18:14:54,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521201413427562 [2023-08-03 18:14:54,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-03 18:14:54,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-03 18:14:54,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:14:54,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-03 18:14:54,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:54,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:54,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:54,849 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 175 flow. Second operand 4 states and 625 transitions. [2023-08-03 18:14:54,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 335 flow [2023-08-03 18:14:54,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 330 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:14:54,866 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 166 flow [2023-08-03 18:14:54,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2023-08-03 18:14:54,867 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 18:14:54,867 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 166 flow [2023-08-03 18:14:54,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:14:54,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:14:54,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:14:54,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 18:14:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:55,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:14:55,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:14:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 968160432, now seen corresponding path program 1 times [2023-08-03 18:14:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:14:55,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798078003] [2023-08-03 18:14:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:14:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:14:55,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:14:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798078003] [2023-08-03 18:14:55,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798078003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:14:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854308289] [2023-08-03 18:14:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:14:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:14:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:14:55,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:14:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 18:14:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:14:55,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:14:55,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:14:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:14:55,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:14:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:14:55,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854308289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:14:55,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:14:55,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:14:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965962397] [2023-08-03 18:14:55,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:14:55,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:14:55,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:14:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:14:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:14:55,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:14:55,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 166 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) [2023-08-03 18:14:55,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:14:55,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:14:55,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:15:15,476 INFO L124 PetriNetUnfolderBase]: 140058/175655 cut-off events. [2023-08-03 18:15:15,476 INFO L125 PetriNetUnfolderBase]: For 10693/10693 co-relation queries the response was YES. [2023-08-03 18:15:15,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364745 conditions, 175655 events. 140058/175655 cut-off events. For 10693/10693 co-relation queries the response was YES. Maximal size of possible extension queue 5307. Compared 982233 event pairs, 66330 based on Foata normal form. 1024/176423 useless extension candidates. Maximal degree in co-relation 174069. Up to 115241 conditions per place. [2023-08-03 18:15:16,448 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 71 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-03 18:15:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 386 flow [2023-08-03 18:15:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:15:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:15:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 638 transitions. [2023-08-03 18:15:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636042402826855 [2023-08-03 18:15:16,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 638 transitions. [2023-08-03 18:15:16,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 638 transitions. [2023-08-03 18:15:16,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:15:16,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 638 transitions. [2023-08-03 18:15:16,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:16,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:16,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:16,454 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 166 flow. Second operand 4 states and 638 transitions. [2023-08-03 18:15:16,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 386 flow [2023-08-03 18:15:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:15:16,463 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 180 flow [2023-08-03 18:15:16,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2023-08-03 18:15:16,463 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-03 18:15:16,463 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 180 flow [2023-08-03 18:15:16,464 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) [2023-08-03 18:15:16,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:15:16,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:15:16,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 18:15:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:15:16,670 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:15:16,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:15:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2079120715, now seen corresponding path program 1 times [2023-08-03 18:15:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:15:16,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336706753] [2023-08-03 18:15:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:15:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:15:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:15:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:15:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:15:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336706753] [2023-08-03 18:15:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336706753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:15:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514429481] [2023-08-03 18:15:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:15:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:15:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:15:16,745 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) [2023-08-03 18:15:16,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 18:15:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:15:16,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:15:16,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:15:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:15:16,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:15:16,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514429481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:15:16,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:15:16,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:15:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73767127] [2023-08-03 18:15:16,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:15:16,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:15:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:15:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:15:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:15:16,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:15:16,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 180 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) [2023-08-03 18:15:16,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:15:16,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:15:16,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:15:33,838 INFO L124 PetriNetUnfolderBase]: 121626/152103 cut-off events. [2023-08-03 18:15:33,838 INFO L125 PetriNetUnfolderBase]: For 35179/35179 co-relation queries the response was YES. [2023-08-03 18:15:34,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332410 conditions, 152103 events. 121626/152103 cut-off events. For 35179/35179 co-relation queries the response was YES. Maximal size of possible extension queue 4387. Compared 820401 event pairs, 1818 based on Foata normal form. 4096/155943 useless extension candidates. Maximal degree in co-relation 158925. Up to 112640 conditions per place. [2023-08-03 18:15:34,650 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 83 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-03 18:15:34,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 93 transitions, 436 flow [2023-08-03 18:15:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:15:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:15:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2023-08-03 18:15:34,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558303886925795 [2023-08-03 18:15:34,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2023-08-03 18:15:34,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2023-08-03 18:15:34,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:15:34,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2023-08-03 18:15:34,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:34,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:34,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:34,657 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 180 flow. Second operand 5 states and 790 transitions. [2023-08-03 18:15:34,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 93 transitions, 436 flow [2023-08-03 18:15:34,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 429 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 18:15:34,925 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 169 flow [2023-08-03 18:15:34,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-08-03 18:15:34,926 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-03 18:15:34,926 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 169 flow [2023-08-03 18:15:34,926 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) [2023-08-03 18:15:34,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:15:34,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:15:34,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 18:15:35,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:15:35,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:15:35,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:15:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash -874695744, now seen corresponding path program 1 times [2023-08-03 18:15:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:15:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363865977] [2023-08-03 18:15:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:15:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:15:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:15:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:15:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:15:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363865977] [2023-08-03 18:15:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363865977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:15:35,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:15:35,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:15:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588668184] [2023-08-03 18:15:35,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:15:35,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:15:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:15:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:15:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:15:35,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 283 [2023-08-03 18:15:35,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:15:35,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:15:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 283 [2023-08-03 18:15:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:16:03,887 INFO L124 PetriNetUnfolderBase]: 216738/268319 cut-off events. [2023-08-03 18:16:03,887 INFO L125 PetriNetUnfolderBase]: For 66379/66379 co-relation queries the response was YES. [2023-08-03 18:16:04,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577897 conditions, 268319 events. 216738/268319 cut-off events. For 66379/66379 co-relation queries the response was YES. Maximal size of possible extension queue 7088. Compared 1458214 event pairs, 101274 based on Foata normal form. 6400/274591 useless extension candidates. Maximal degree in co-relation 276057. Up to 235753 conditions per place. [2023-08-03 18:16:05,427 INFO L140 encePairwiseOnDemand]: 276/283 looper letters, 61 selfloop transitions, 5 changer transitions 33/104 dead transitions. [2023-08-03 18:16:05,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 528 flow [2023-08-03 18:16:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:16:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:16:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 786 transitions. [2023-08-03 18:16:05,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5554770318021202 [2023-08-03 18:16:05,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 786 transitions. [2023-08-03 18:16:05,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 786 transitions. [2023-08-03 18:16:05,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:16:05,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 786 transitions. [2023-08-03 18:16:05,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:05,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:05,433 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:05,433 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 169 flow. Second operand 5 states and 786 transitions. [2023-08-03 18:16:05,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 528 flow [2023-08-03 18:16:05,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 518 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:16:05,473 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 209 flow [2023-08-03 18:16:05,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-03 18:16:05,474 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 18 predicate places. [2023-08-03 18:16:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 209 flow [2023-08-03 18:16:05,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:05,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:16:05,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:16:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:16:05,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:16:05,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:16:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1560489436, now seen corresponding path program 1 times [2023-08-03 18:16:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:16:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821692787] [2023-08-03 18:16:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:16:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:16:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:16:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:16:05,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:16:05,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821692787] [2023-08-03 18:16:05,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821692787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:16:05,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:16:05,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:16:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218601487] [2023-08-03 18:16:05,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:16:05,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:16:05,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:16:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:16:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:16:05,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-03 18:16:05,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:05,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:16:05,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-03 18:16:05,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:16:37,557 INFO L124 PetriNetUnfolderBase]: 198466/258565 cut-off events. [2023-08-03 18:16:37,557 INFO L125 PetriNetUnfolderBase]: For 149504/153724 co-relation queries the response was YES. [2023-08-03 18:16:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615696 conditions, 258565 events. 198466/258565 cut-off events. For 149504/153724 co-relation queries the response was YES. Maximal size of possible extension queue 7773. Compared 1706811 event pairs, 36764 based on Foata normal form. 6291/261540 useless extension candidates. Maximal degree in co-relation 615598. Up to 208417 conditions per place. [2023-08-03 18:16:39,276 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 73 selfloop transitions, 3 changer transitions 33/118 dead transitions. [2023-08-03 18:16:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 118 transitions, 658 flow [2023-08-03 18:16:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:16:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:16:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2023-08-03 18:16:39,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566077738515901 [2023-08-03 18:16:39,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2023-08-03 18:16:39,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2023-08-03 18:16:39,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:16:39,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2023-08-03 18:16:39,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:39,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:39,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:39,281 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 209 flow. Second operand 5 states and 801 transitions. [2023-08-03 18:16:39,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 118 transitions, 658 flow [2023-08-03 18:16:41,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 649 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:16:41,192 INFO L231 Difference]: Finished difference. Result has 82 places, 53 transitions, 229 flow [2023-08-03 18:16:41,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=82, PETRI_TRANSITIONS=53} [2023-08-03 18:16:41,192 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 21 predicate places. [2023-08-03 18:16:41,192 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 53 transitions, 229 flow [2023-08-03 18:16:41,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:41,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:16:41,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:16:41,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 18:16:41,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:16:41,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:16:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1805435008, now seen corresponding path program 1 times [2023-08-03 18:16:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:16:41,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694738980] [2023-08-03 18:16:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:16:41,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:16:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:16:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:16:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:16:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694738980] [2023-08-03 18:16:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694738980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:16:41,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:16:41,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:16:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387074872] [2023-08-03 18:16:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:16:41,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:16:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:16:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:16:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:16:41,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-03 18:16:41,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 53 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:16:41,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:16:41,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-03 18:16:41,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:17:11,040 INFO L124 PetriNetUnfolderBase]: 189719/238267 cut-off events. [2023-08-03 18:17:11,040 INFO L125 PetriNetUnfolderBase]: For 207883/210541 co-relation queries the response was YES. [2023-08-03 18:17:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638006 conditions, 238267 events. 189719/238267 cut-off events. For 207883/210541 co-relation queries the response was YES. Maximal size of possible extension queue 6786. Compared 1360229 event pairs, 90228 based on Foata normal form. 5265/241836 useless extension candidates. Maximal degree in co-relation 544996. Up to 204771 conditions per place. [2023-08-03 18:17:12,850 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 71 selfloop transitions, 3 changer transitions 33/116 dead transitions. [2023-08-03 18:17:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 116 transitions, 673 flow [2023-08-03 18:17:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:17:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:17:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 811 transitions. [2023-08-03 18:17:12,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5731448763250884 [2023-08-03 18:17:12,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 811 transitions. [2023-08-03 18:17:12,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 811 transitions. [2023-08-03 18:17:12,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:17:12,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 811 transitions. [2023-08-03 18:17:12,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:12,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:12,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:12,857 INFO L175 Difference]: Start difference. First operand has 82 places, 53 transitions, 229 flow. Second operand 5 states and 811 transitions. [2023-08-03 18:17:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 116 transitions, 673 flow [2023-08-03 18:17:12,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 666 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:17:12,986 INFO L231 Difference]: Finished difference. Result has 85 places, 55 transitions, 251 flow [2023-08-03 18:17:12,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=85, PETRI_TRANSITIONS=55} [2023-08-03 18:17:12,988 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 24 predicate places. [2023-08-03 18:17:12,988 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 55 transitions, 251 flow [2023-08-03 18:17:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:12,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:17:12,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:17:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 18:17:12,989 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:17:12,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:17:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -180783373, now seen corresponding path program 1 times [2023-08-03 18:17:12,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:17:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915585616] [2023-08-03 18:17:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:17:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:17:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:17:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:17:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:17:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915585616] [2023-08-03 18:17:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915585616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:17:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495895982] [2023-08-03 18:17:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:17:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:17:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:17:13,168 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) [2023-08-03 18:17:13,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 18:17:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:17:13,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 18:17:13,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:17:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:17:13,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:17:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495895982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:17:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:17:13,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2023-08-03 18:17:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215937166] [2023-08-03 18:17:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:17:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:17:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:17:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:17:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-03 18:17:13,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 283 [2023-08-03 18:17:13,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 55 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:13,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:17:13,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 283 [2023-08-03 18:17:13,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:17:39,559 INFO L124 PetriNetUnfolderBase]: 169465/213989 cut-off events. [2023-08-03 18:17:39,559 INFO L125 PetriNetUnfolderBase]: For 234289/238001 co-relation queries the response was YES. [2023-08-03 18:17:40,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613076 conditions, 213989 events. 169465/213989 cut-off events. For 234289/238001 co-relation queries the response was YES. Maximal size of possible extension queue 6448. Compared 1254034 event pairs, 31688 based on Foata normal form. 6288/217256 useless extension candidates. Maximal degree in co-relation 533353. Up to 164024 conditions per place. [2023-08-03 18:17:41,045 INFO L140 encePairwiseOnDemand]: 274/283 looper letters, 118 selfloop transitions, 13 changer transitions 4/144 dead transitions. [2023-08-03 18:17:41,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 144 transitions, 878 flow [2023-08-03 18:17:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:17:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:17:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 782 transitions. [2023-08-03 18:17:41,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526501766784452 [2023-08-03 18:17:41,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 782 transitions. [2023-08-03 18:17:41,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 782 transitions. [2023-08-03 18:17:41,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:17:41,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 782 transitions. [2023-08-03 18:17:41,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:41,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:41,053 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:41,053 INFO L175 Difference]: Start difference. First operand has 85 places, 55 transitions, 251 flow. Second operand 5 states and 782 transitions. [2023-08-03 18:17:41,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 144 transitions, 878 flow [2023-08-03 18:17:41,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 867 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:17:41,158 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 349 flow [2023-08-03 18:17:41,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2023-08-03 18:17:41,158 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2023-08-03 18:17:41,158 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 349 flow [2023-08-03 18:17:41,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:41,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:17:41,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:17:41,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 18:17:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 18:17:41,363 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:17:41,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:17:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1877104967, now seen corresponding path program 1 times [2023-08-03 18:17:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:17:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788446572] [2023-08-03 18:17:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:17:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:17:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:17:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:17:41,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:17:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788446572] [2023-08-03 18:17:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788446572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:17:41,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:17:41,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 18:17:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659624408] [2023-08-03 18:17:41,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:17:41,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:17:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:17:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:17:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:17:41,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 283 [2023-08-03 18:17:41,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:17:41,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:17:41,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 283 [2023-08-03 18:17:41,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:18:37,532 INFO L124 PetriNetUnfolderBase]: 338996/426363 cut-off events. [2023-08-03 18:18:37,532 INFO L125 PetriNetUnfolderBase]: For 709403/709403 co-relation queries the response was YES. [2023-08-03 18:18:39,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484571 conditions, 426363 events. 338996/426363 cut-off events. For 709403/709403 co-relation queries the response was YES. Maximal size of possible extension queue 12328. Compared 2650243 event pairs, 96830 based on Foata normal form. 7941/434207 useless extension candidates. Maximal degree in co-relation 773810. Up to 205065 conditions per place. [2023-08-03 18:18:41,423 INFO L140 encePairwiseOnDemand]: 277/283 looper letters, 91 selfloop transitions, 6 changer transitions 53/155 dead transitions. [2023-08-03 18:18:41,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 155 transitions, 1103 flow [2023-08-03 18:18:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:18:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:18:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 803 transitions. [2023-08-03 18:18:41,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674911660777385 [2023-08-03 18:18:41,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 803 transitions. [2023-08-03 18:18:41,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 803 transitions. [2023-08-03 18:18:41,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:18:41,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 803 transitions. [2023-08-03 18:18:41,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:18:41,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:18:41,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:18:41,430 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 349 flow. Second operand 5 states and 803 transitions. [2023-08-03 18:18:41,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 155 transitions, 1103 flow [2023-08-03 18:18:51,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 155 transitions, 1090 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:18:51,817 INFO L231 Difference]: Finished difference. Result has 95 places, 65 transitions, 372 flow [2023-08-03 18:18:51,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=95, PETRI_TRANSITIONS=65} [2023-08-03 18:18:51,818 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 34 predicate places. [2023-08-03 18:18:51,818 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 65 transitions, 372 flow [2023-08-03 18:18:51,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:18:51,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:18:51,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:18:51,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 18:18:51,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:18:51,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:18:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash -473325085, now seen corresponding path program 1 times [2023-08-03 18:18:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:18:51,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468718075] [2023-08-03 18:18:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:18:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:18:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:18:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:18:51,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:18:51,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468718075] [2023-08-03 18:18:51,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468718075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:18:51,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368951260] [2023-08-03 18:18:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:18:51,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:18:51,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:18:52,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:18:52,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 18:18:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:18:52,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-03 18:18:52,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:18:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:18:52,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:18:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:18:52,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368951260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:18:52,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:18:52,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 18:18:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415568813] [2023-08-03 18:18:52,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:18:52,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 18:18:52,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:18:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 18:18:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-03 18:18:52,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 283 [2023-08-03 18:18:52,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 65 transitions, 372 flow. Second operand has 9 states, 9 states have (on average 139.77777777777777) internal successors, (1258), 9 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:18:52,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:18:52,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 283 [2023-08-03 18:18:52,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand