/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:20:47,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:20:47,967 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:20:47,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:20:47,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:20:47,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:20:47,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:20:47,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:20:47,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:20:47,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:20:47,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:20:47,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:20:47,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:20:47,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:20:47,993 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:20:47,993 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:20:47,994 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:20:47,994 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:20:47,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:20:47,994 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:20:47,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:20:47,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:20:47,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:20:47,997 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:20:47,997 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:20:47,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:20:47,998 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:20:47,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:20:47,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:20:47,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:20:47,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:20:47,999 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:20:47,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:20:47,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:20:47,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:20:48,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:20:48,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:20:48,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:20:48,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:20:48,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:20:48,001 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:20:48,002 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:20:48,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:20:48,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:20:48,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:20:48,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:20:48,250 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:20:48,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:20:49,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:20:49,729 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:20:49,729 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:20:49,746 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82769e24c/751e0e19e0c244e5b7980a6b6e8e0e65/FLAG0292b135c [2023-08-04 00:20:49,761 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82769e24c/751e0e19e0c244e5b7980a6b6e8e0e65 [2023-08-04 00:20:49,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:20:49,771 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:20:49,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:20:49,772 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:20:49,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:20:49,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:20:49" (1/1) ... [2023-08-04 00:20:49,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e0b221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:49, skipping insertion in model container [2023-08-04 00:20:49,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:20:49" (1/1) ... [2023-08-04 00:20:49,825 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:20:49,954 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_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 00:20:50,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:20:50,108 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:20:50,121 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_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 00:20:50,140 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:20:50,141 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:20:50,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:20:50,201 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:20:50,201 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:20:50,207 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:20:50,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50 WrapperNode [2023-08-04 00:20:50,209 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:20:50,210 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:20:50,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:20:50,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:20:50,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,246 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,271 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2023-08-04 00:20:50,271 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:20:50,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:20:50,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:20:50,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:20:50,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:20:50,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:20:50,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:20:50,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:20:50,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (1/1) ... [2023-08-04 00:20:50,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:20:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:20:50,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:20:50,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:20:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:20:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:20:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:20:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:20:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:20:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:20:50,390 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:20:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:20:50,391 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:20:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:20:50,391 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:20:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:20:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:20:50,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:20:50,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:20:50,393 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:20:50,496 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:20:50,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:20:50,642 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:20:50,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:20:50,648 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:20:50,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:20:50 BoogieIcfgContainer [2023-08-04 00:20:50,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:20:50,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:20:50,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:20:50,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:20:50,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:20:49" (1/3) ... [2023-08-04 00:20:50,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e1f19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:20:50, skipping insertion in model container [2023-08-04 00:20:50,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:20:50" (2/3) ... [2023-08-04 00:20:50,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e1f19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:20:50, skipping insertion in model container [2023-08-04 00:20:50,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:20:50" (3/3) ... [2023-08-04 00:20:50,661 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe009_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 00:20:50,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:20:50,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:20:50,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:20:50,673 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:20:50,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:20:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 00:20:50,892 INFO L124 PetriNetUnfolderBase]: 30/409 cut-off events. [2023-08-04 00:20:50,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:20:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 409 events. 30/409 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1818 event pairs, 0 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-08-04 00:20:50,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 00:20:50,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 76 transitions, 167 flow [2023-08-04 00:20:50,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:20:50,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 00:20:50,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 00:20:50,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 167 flow [2023-08-04 00:20:50,943 INFO L124 PetriNetUnfolderBase]: 6/185 cut-off events. [2023-08-04 00:20:50,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:20:50,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 185 events. 6/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 564 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2023-08-04 00:20:50,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 1072 [2023-08-04 00:20:52,601 INFO L134 LiptonReduction]: Checked pairs total: 1933 [2023-08-04 00:20:52,601 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-04 00:20:52,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:20:52,617 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;@1e4be033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:20:52,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:20:52,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:20:52,623 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:20:52,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:20:52,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:20:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:20:52,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:20:52,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:20:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1813135072, now seen corresponding path program 1 times [2023-08-04 00:20:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:20:52,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988746930] [2023-08-04 00:20:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:20:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:20:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:20:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988746930] [2023-08-04 00:20:52,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988746930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:20:52,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:20:52,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:20:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468889784] [2023-08-04 00:20:52,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:20:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:20:52,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:20:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:20:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:20:52,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 163 [2023-08-04 00:20:52,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:52,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:20:52,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 163 [2023-08-04 00:20:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:20:52,977 INFO L124 PetriNetUnfolderBase]: 160/325 cut-off events. [2023-08-04 00:20:52,978 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 00:20:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 325 events. 160/325 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1406 event pairs, 78 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 643. Up to 284 conditions per place. [2023-08-04 00:20:52,982 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 18 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-04 00:20:52,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 00:20:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:20:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:20:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-08-04 00:20:52,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6012269938650306 [2023-08-04 00:20:52,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-08-04 00:20:52,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-08-04 00:20:52,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:20:53,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-08-04 00:20:53,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:53,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:53,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:53,011 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 59 flow. Second operand 3 states and 294 transitions. [2023-08-04 00:20:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 00:20:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:20:53,015 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 67 flow [2023-08-04 00:20:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 00:20:53,019 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 00:20:53,019 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 67 flow [2023-08-04 00:20:53,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:53,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:20:53,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:20:53,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:20:53,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:20:53,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:20:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1807826107, now seen corresponding path program 1 times [2023-08-04 00:20:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:20:53,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105950748] [2023-08-04 00:20:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:20:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:20:53,053 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:20:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:20:53,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:20:53,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:20:53,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:20:53,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:20:53,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:20:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:20:53,085 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:20:53,087 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:20:53,087 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:20:53,087 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:20:53,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:20:53,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 00:20:53,236 INFO L124 PetriNetUnfolderBase]: 93/1285 cut-off events. [2023-08-04 00:20:53,236 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:20:53,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 1285 events. 93/1285 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8681 event pairs, 0 based on Foata normal form. 0/1126 useless extension candidates. Maximal degree in co-relation 935. Up to 54 conditions per place. [2023-08-04 00:20:53,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 00:20:53,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 228 flow [2023-08-04 00:20:53,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:20:53,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 96 transitions, 228 flow [2023-08-04 00:20:53,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 96 transitions, 228 flow [2023-08-04 00:20:53,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 96 transitions, 228 flow [2023-08-04 00:20:53,294 INFO L124 PetriNetUnfolderBase]: 12/529 cut-off events. [2023-08-04 00:20:53,294 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:20:53,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 529 events. 12/529 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2662 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 431. Up to 27 conditions per place. [2023-08-04 00:20:53,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 2828 [2023-08-04 00:20:54,890 INFO L134 LiptonReduction]: Checked pairs total: 5939 [2023-08-04 00:20:54,890 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 00:20:54,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:20:54,893 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;@1e4be033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:20:54,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:20:54,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:20:54,899 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-04 00:20:54,899 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:20:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:20:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:20:54,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:20:54,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:20:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1427890828, now seen corresponding path program 1 times [2023-08-04 00:20:54,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:20:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636988984] [2023-08-04 00:20:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:20:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:20:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:20:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636988984] [2023-08-04 00:20:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636988984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:20:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:20:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:20:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451947933] [2023-08-04 00:20:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:20:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:20:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:20:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:20:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:20:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 189 [2023-08-04 00:20:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:20:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 189 [2023-08-04 00:20:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:20:56,560 INFO L124 PetriNetUnfolderBase]: 12844/19016 cut-off events. [2023-08-04 00:20:56,560 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2023-08-04 00:20:56,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38703 conditions, 19016 events. 12844/19016 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 124609 event pairs, 9918 based on Foata normal form. 0/18817 useless extension candidates. Maximal degree in co-relation 11803. Up to 17234 conditions per place. [2023-08-04 00:20:56,786 INFO L140 encePairwiseOnDemand]: 186/189 looper letters, 28 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 00:20:56,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 176 flow [2023-08-04 00:20:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:20:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:20:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-04 00:20:56,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261022927689595 [2023-08-04 00:20:56,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-04 00:20:56,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-04 00:20:56,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:20:56,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-04 00:20:56,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:56,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:56,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:56,795 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 108 flow. Second operand 3 states and 355 transitions. [2023-08-04 00:20:56,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 176 flow [2023-08-04 00:20:56,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 170 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:20:56,800 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 114 flow [2023-08-04 00:20:56,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 00:20:56,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 00:20:56,801 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 114 flow [2023-08-04 00:20:56,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:56,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:20:56,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:20:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:20:56,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:20:56,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:20:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1604379151, now seen corresponding path program 1 times [2023-08-04 00:20:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:20:56,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354634944] [2023-08-04 00:20:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:56,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:20:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:20:56,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:20:56,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354634944] [2023-08-04 00:20:56,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354634944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:20:56,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760379555] [2023-08-04 00:20:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:56,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:20:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:20:56,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:20:56,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:20:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:56,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:20:56,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:20:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:20:57,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:20:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760379555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:20:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:20:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:20:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114595211] [2023-08-04 00:20:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:20:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:20:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:20:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:20:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:20:57,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 189 [2023-08-04 00:20:57,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:57,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:20:57,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 189 [2023-08-04 00:20:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:20:58,582 INFO L124 PetriNetUnfolderBase]: 12832/18977 cut-off events. [2023-08-04 00:20:58,582 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2023-08-04 00:20:58,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38379 conditions, 18977 events. 12832/18977 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 124224 event pairs, 7728 based on Foata normal form. 9/18805 useless extension candidates. Maximal degree in co-relation 13755. Up to 17187 conditions per place. [2023-08-04 00:20:58,705 INFO L140 encePairwiseOnDemand]: 185/189 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-08-04 00:20:58,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 198 flow [2023-08-04 00:20:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:20:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:20:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-04 00:20:58,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042328042328042 [2023-08-04 00:20:58,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-04 00:20:58,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-04 00:20:58,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:20:58,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-04 00:20:58,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 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) [2023-08-04 00:20:58,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:58,716 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:58,716 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 114 flow. Second operand 5 states and 571 transitions. [2023-08-04 00:20:58,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 198 flow [2023-08-04 00:20:58,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:20:58,718 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 128 flow [2023-08-04 00:20:58,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-08-04 00:20:58,720 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-08-04 00:20:58,721 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 128 flow [2023-08-04 00:20:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:58,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:20:58,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:20:58,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:20:58,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:20:58,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:20:58,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:20:58,929 INFO L85 PathProgramCache]: Analyzing trace with hash 796465005, now seen corresponding path program 1 times [2023-08-04 00:20:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:20:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358071147] [2023-08-04 00:20:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:58,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:20:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:20:58,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:20:58,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358071147] [2023-08-04 00:20:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358071147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:20:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824556290] [2023-08-04 00:20:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:20:58,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:20:58,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:20:58,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:20:58,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:20:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:20:59,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:20:59,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:20:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:20:59,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:20:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824556290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:20:59,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:20:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:20:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751340495] [2023-08-04 00:20:59,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:20:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:20:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:20:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:20:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:20:59,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 189 [2023-08-04 00:20:59,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:20:59,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:20:59,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 189 [2023-08-04 00:20:59,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:00,421 INFO L124 PetriNetUnfolderBase]: 12242/17660 cut-off events. [2023-08-04 00:21:00,422 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2023-08-04 00:21:00,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36259 conditions, 17660 events. 12242/17660 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 111073 event pairs, 9508 based on Foata normal form. 0/17443 useless extension candidates. Maximal degree in co-relation 11192. Up to 16198 conditions per place. [2023-08-04 00:21:00,512 INFO L140 encePairwiseOnDemand]: 186/189 looper letters, 33 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-04 00:21:00,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 216 flow [2023-08-04 00:21:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-04 00:21:00,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331569664902998 [2023-08-04 00:21:00,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-04 00:21:00,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-04 00:21:00,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:00,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-04 00:21:00,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:00,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:00,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:00,517 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 128 flow. Second operand 3 states and 359 transitions. [2023-08-04 00:21:00,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 216 flow [2023-08-04 00:21:00,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 209 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:21:00,518 INFO L231 Difference]: Finished difference. Result has 56 places, 38 transitions, 136 flow [2023-08-04 00:21:00,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=38} [2023-08-04 00:21:00,519 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-04 00:21:00,519 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 38 transitions, 136 flow [2023-08-04 00:21:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:00,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:00,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:00,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:21:00,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1934322044, now seen corresponding path program 1 times [2023-08-04 00:21:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:00,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243889064] [2023-08-04 00:21:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:21:00,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243889064] [2023-08-04 00:21:00,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243889064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:00,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920603263] [2023-08-04 00:21:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:00,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:00,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:00,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:00,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:21:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:00,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:21:00,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:21:00,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:21:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920603263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:00,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:21:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73270280] [2023-08-04 00:21:00,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:00,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:00,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 189 [2023-08-04 00:21:00,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:00,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:00,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 189 [2023-08-04 00:21:00,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:01,845 INFO L124 PetriNetUnfolderBase]: 9694/13727 cut-off events. [2023-08-04 00:21:01,845 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-04 00:21:01,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28452 conditions, 13727 events. 9694/13727 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 80334 event pairs, 5616 based on Foata normal form. 3/13648 useless extension candidates. Maximal degree in co-relation 10141. Up to 12736 conditions per place. [2023-08-04 00:21:01,923 INFO L140 encePairwiseOnDemand]: 186/189 looper letters, 32 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-04 00:21:01,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 213 flow [2023-08-04 00:21:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-04 00:21:01,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124338624338624 [2023-08-04 00:21:01,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-04 00:21:01,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-04 00:21:01,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:01,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-04 00:21:01,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:01,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:01,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:01,929 INFO L175 Difference]: Start difference. First operand has 56 places, 38 transitions, 136 flow. Second operand 4 states and 463 transitions. [2023-08-04 00:21:01,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 213 flow [2023-08-04 00:21:01,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:01,932 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 131 flow [2023-08-04 00:21:01,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-04 00:21:01,933 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-04 00:21:01,933 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 131 flow [2023-08-04 00:21:01,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:01,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:01,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:01,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:02,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:02,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:21:02,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2119110228, now seen corresponding path program 1 times [2023-08-04 00:21:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180545184] [2023-08-04 00:21:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:21:02,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180545184] [2023-08-04 00:21:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180545184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111575255] [2023-08-04 00:21:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:02,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:02,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:21:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:02,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:21:02,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:21:02,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:21:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111575255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:02,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:21:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:21:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354163421] [2023-08-04 00:21:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:21:02,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 189 [2023-08-04 00:21:02,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:02,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:02,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 189 [2023-08-04 00:21:02,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:03,320 INFO L124 PetriNetUnfolderBase]: 9478/13309 cut-off events. [2023-08-04 00:21:03,321 INFO L125 PetriNetUnfolderBase]: For 1006/1006 co-relation queries the response was YES. [2023-08-04 00:21:03,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27696 conditions, 13309 events. 9478/13309 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 76427 event pairs, 2182 based on Foata normal form. 81/13389 useless extension candidates. Maximal degree in co-relation 9869. Up to 11907 conditions per place. [2023-08-04 00:21:03,381 INFO L140 encePairwiseOnDemand]: 185/189 looper letters, 44 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-04 00:21:03,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 265 flow [2023-08-04 00:21:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:21:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:21:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 583 transitions. [2023-08-04 00:21:03,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169312169312169 [2023-08-04 00:21:03,384 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 583 transitions. [2023-08-04 00:21:03,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 583 transitions. [2023-08-04 00:21:03,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:03,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 583 transitions. [2023-08-04 00:21:03,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:03,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:03,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:03,388 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 131 flow. Second operand 5 states and 583 transitions. [2023-08-04 00:21:03,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 265 flow [2023-08-04 00:21:03,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 258 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:21:03,391 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 141 flow [2023-08-04 00:21:03,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-08-04 00:21:03,392 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-08-04 00:21:03,392 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 141 flow [2023-08-04 00:21:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:03,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:03,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:03,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:03,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:21:03,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1780035304, now seen corresponding path program 1 times [2023-08-04 00:21:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:03,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868123171] [2023-08-04 00:21:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:03,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:21:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:03,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868123171] [2023-08-04 00:21:03,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868123171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135855480] [2023-08-04 00:21:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:03,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:03,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:21:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:03,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:21:03,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:21:03,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:21:03,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135855480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:03,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:03,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:21:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124315464] [2023-08-04 00:21:03,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:03,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:03,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:03,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:03,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 189 [2023-08-04 00:21:03,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:03,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:03,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 189 [2023-08-04 00:21:03,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:04,525 INFO L124 PetriNetUnfolderBase]: 7588/10555 cut-off events. [2023-08-04 00:21:04,525 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2023-08-04 00:21:04,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22275 conditions, 10555 events. 7588/10555 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 58121 event pairs, 4450 based on Foata normal form. 27/10581 useless extension candidates. Maximal degree in co-relation 7913. Up to 9394 conditions per place. [2023-08-04 00:21:04,568 INFO L140 encePairwiseOnDemand]: 186/189 looper letters, 40 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-04 00:21:04,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 251 flow [2023-08-04 00:21:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-04 00:21:04,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2023-08-04 00:21:04,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-04 00:21:04,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-04 00:21:04,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:04,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-04 00:21:04,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 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) [2023-08-04 00:21:04,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:04,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:04,573 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 141 flow. Second operand 4 states and 471 transitions. [2023-08-04 00:21:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 251 flow [2023-08-04 00:21:04,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 246 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:21:04,576 INFO L231 Difference]: Finished difference. Result has 60 places, 36 transitions, 134 flow [2023-08-04 00:21:04,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=60, PETRI_TRANSITIONS=36} [2023-08-04 00:21:04,577 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-04 00:21:04,577 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 36 transitions, 134 flow [2023-08-04 00:21:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:04,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:04,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:04,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:04,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:21:04,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1919983916, now seen corresponding path program 1 times [2023-08-04 00:21:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359719928] [2023-08-04 00:21:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:21:04,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:04,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359719928] [2023-08-04 00:21:04,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359719928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:04,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:21:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248482147] [2023-08-04 00:21:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:04,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:21:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:21:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:21:04,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 189 [2023-08-04 00:21:04,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 36 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:04,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:04,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 189 [2023-08-04 00:21:04,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:05,291 INFO L124 PetriNetUnfolderBase]: 4672/6712 cut-off events. [2023-08-04 00:21:05,292 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-08-04 00:21:05,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14571 conditions, 6712 events. 4672/6712 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35683 event pairs, 568 based on Foata normal form. 729/7440 useless extension candidates. Maximal degree in co-relation 7268. Up to 4212 conditions per place. [2023-08-04 00:21:05,305 INFO L140 encePairwiseOnDemand]: 187/189 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-04 00:21:05,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 258 flow [2023-08-04 00:21:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 477 transitions. [2023-08-04 00:21:05,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2023-08-04 00:21:05,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 477 transitions. [2023-08-04 00:21:05,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 477 transitions. [2023-08-04 00:21:05,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:05,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 477 transitions. [2023-08-04 00:21:05,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:05,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:05,317 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:05,317 INFO L175 Difference]: Start difference. First operand has 60 places, 36 transitions, 134 flow. Second operand 4 states and 477 transitions. [2023-08-04 00:21:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 258 flow [2023-08-04 00:21:05,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 251 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:21:05,351 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-04 00:21:05,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-04 00:21:05,353 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-04 00:21:05,353 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-04 00:21:05,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:05,353 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:21:05,353 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:21:05,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:21:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:21:05,354 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:05,354 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:21:05,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 00:21:05,441 INFO L124 PetriNetUnfolderBase]: 93/1285 cut-off events. [2023-08-04 00:21:05,442 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:21:05,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 1285 events. 93/1285 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8681 event pairs, 0 based on Foata normal form. 0/1126 useless extension candidates. Maximal degree in co-relation 935. Up to 54 conditions per place. [2023-08-04 00:21:05,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 00:21:05,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 109 transitions, 242 flow [2023-08-04 00:21:05,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:21:05,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 109 transitions, 242 flow [2023-08-04 00:21:05,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 109 transitions, 242 flow [2023-08-04 00:21:05,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 109 transitions, 242 flow [2023-08-04 00:21:05,506 INFO L124 PetriNetUnfolderBase]: 66/948 cut-off events. [2023-08-04 00:21:05,506 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:21:05,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 948 events. 66/948 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5860 event pairs, 0 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 707. Up to 54 conditions per place. [2023-08-04 00:21:05,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 3776 [2023-08-04 00:21:07,074 INFO L134 LiptonReduction]: Checked pairs total: 7382 [2023-08-04 00:21:07,075 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-04 00:21:07,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:21:07,076 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;@1e4be033, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:21:07,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:21:07,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:21:07,078 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-04 00:21:07,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:21:07,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:07,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:21:07,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:07,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 612264896, now seen corresponding path program 1 times [2023-08-04 00:21:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:07,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378787608] [2023-08-04 00:21:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:21:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378787608] [2023-08-04 00:21:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378787608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:07,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:21:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097094735] [2023-08-04 00:21:07,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:07,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:21:07,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 00:21:07,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:07,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:07,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 00:21:07,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:09,663 INFO L124 PetriNetUnfolderBase]: 33046/45383 cut-off events. [2023-08-04 00:21:09,663 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 00:21:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90774 conditions, 45383 events. 33046/45383 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1426. Compared 283199 event pairs, 26064 based on Foata normal form. 0/42565 useless extension candidates. Maximal degree in co-relation 26182. Up to 43520 conditions per place. [2023-08-04 00:21:09,943 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 00:21:09,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2023-08-04 00:21:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-04 00:21:09,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583739837398374 [2023-08-04 00:21:09,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-04 00:21:09,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-04 00:21:09,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:09,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-04 00:21:09,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:09,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:09,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:09,947 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 98 flow. Second operand 3 states and 359 transitions. [2023-08-04 00:21:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2023-08-04 00:21:09,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:21:09,949 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 108 flow [2023-08-04 00:21:09,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 00:21:09,949 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 00:21:09,950 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 108 flow [2023-08-04 00:21:09,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:09,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:09,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:21:09,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:09,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1275287068, now seen corresponding path program 1 times [2023-08-04 00:21:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823968123] [2023-08-04 00:21:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:21:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823968123] [2023-08-04 00:21:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823968123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616220064] [2023-08-04 00:21:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:09,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:09,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:09,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:21:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:10,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:21:10,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:21:10,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:21:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616220064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:10,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:21:10,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:21:10,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269415535] [2023-08-04 00:21:10,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:10,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:10,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:10,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:10,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:10,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 00:21:10,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:10,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:10,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 00:21:10,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:12,586 INFO L124 PetriNetUnfolderBase]: 31406/42137 cut-off events. [2023-08-04 00:21:12,587 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 00:21:12,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85018 conditions, 42137 events. 31406/42137 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 252767 event pairs, 24928 based on Foata normal form. 0/39904 useless extension candidates. Maximal degree in co-relation 84981. Up to 40987 conditions per place. [2023-08-04 00:21:12,768 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 00:21:12,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 200 flow [2023-08-04 00:21:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-04 00:21:12,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886178861788618 [2023-08-04 00:21:12,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-04 00:21:12,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-04 00:21:12,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:12,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-04 00:21:12,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:12,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:12,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:12,772 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 108 flow. Second operand 3 states and 362 transitions. [2023-08-04 00:21:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 200 flow [2023-08-04 00:21:12,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:12,773 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 118 flow [2023-08-04 00:21:12,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-04 00:21:12,774 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-04 00:21:12,774 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 118 flow [2023-08-04 00:21:12,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:12,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:12,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:12,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:12,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:12,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1696912681, now seen corresponding path program 1 times [2023-08-04 00:21:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:12,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924181449] [2023-08-04 00:21:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:21:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924181449] [2023-08-04 00:21:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924181449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749730] [2023-08-04 00:21:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:13,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:13,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:13,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:21:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:13,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:21:13,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:21:13,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:21:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:13,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:21:13,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:21:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687685605] [2023-08-04 00:21:13,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:13,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:13,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 00:21:13,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:13,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:13,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 00:21:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:15,442 INFO L124 PetriNetUnfolderBase]: 30734/41054 cut-off events. [2023-08-04 00:21:15,442 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 00:21:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83309 conditions, 41054 events. 30734/41054 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1385. Compared 238285 event pairs, 23582 based on Foata normal form. 0/39322 useless extension candidates. Maximal degree in co-relation 23576. Up to 37757 conditions per place. [2023-08-04 00:21:15,661 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 41 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 00:21:15,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 228 flow [2023-08-04 00:21:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-04 00:21:15,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2023-08-04 00:21:15,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-04 00:21:15,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-04 00:21:15,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:15,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-04 00:21:15,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:15,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:15,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:15,693 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 118 flow. Second operand 3 states and 366 transitions. [2023-08-04 00:21:15,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 228 flow [2023-08-04 00:21:15,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:15,695 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 128 flow [2023-08-04 00:21:15,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-04 00:21:15,695 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-04 00:21:15,695 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 128 flow [2023-08-04 00:21:15,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:15,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:15,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:15,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:15,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:15,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1037377285, now seen corresponding path program 1 times [2023-08-04 00:21:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:15,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800068372] [2023-08-04 00:21:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:21:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800068372] [2023-08-04 00:21:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800068372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875228747] [2023-08-04 00:21:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:16,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:16,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:16,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:21:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:16,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:21:16,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:21:16,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:21:16,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875228747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:16,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:16,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:21:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333785191] [2023-08-04 00:21:16,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:16,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:16,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:16,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2023-08-04 00:21:16,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:16,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:16,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2023-08-04 00:21:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:18,086 INFO L124 PetriNetUnfolderBase]: 24232/31949 cut-off events. [2023-08-04 00:21:18,087 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 00:21:18,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67838 conditions, 31949 events. 24232/31949 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 175240 event pairs, 14820 based on Foata normal form. 3/31924 useless extension candidates. Maximal degree in co-relation 24162. Up to 31258 conditions per place. [2023-08-04 00:21:18,232 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 36 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-08-04 00:21:18,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 00:21:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2023-08-04 00:21:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695121951219512 [2023-08-04 00:21:18,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2023-08-04 00:21:18,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2023-08-04 00:21:18,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:18,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2023-08-04 00:21:18,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:18,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:18,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:18,237 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 128 flow. Second operand 4 states and 467 transitions. [2023-08-04 00:21:18,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 00:21:18,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:18,243 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 140 flow [2023-08-04 00:21:18,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 00:21:18,243 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-04 00:21:18,243 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 140 flow [2023-08-04 00:21:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:18,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:18,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:21:18,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:18,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1534823584, now seen corresponding path program 1 times [2023-08-04 00:21:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300774626] [2023-08-04 00:21:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:21:18,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:18,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300774626] [2023-08-04 00:21:18,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300774626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:18,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717928230] [2023-08-04 00:21:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:18,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:18,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:21:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:18,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:21:18,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:21:18,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:21:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717928230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:18,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:21:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726194028] [2023-08-04 00:21:18,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:18,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2023-08-04 00:21:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:18,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:18,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2023-08-04 00:21:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:20,118 INFO L124 PetriNetUnfolderBase]: 19198/25027 cut-off events. [2023-08-04 00:21:20,118 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 00:21:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52913 conditions, 25027 events. 19198/25027 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 133150 event pairs, 11902 based on Foata normal form. 27/25053 useless extension candidates. Maximal degree in co-relation 18809. Up to 23785 conditions per place. [2023-08-04 00:21:20,246 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 44 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 00:21:20,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 268 flow [2023-08-04 00:21:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 00:21:20,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2023-08-04 00:21:20,248 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 00:21:20,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 00:21:20,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:20,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 00:21:20,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:20,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:20,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:20,251 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 140 flow. Second operand 4 states and 475 transitions. [2023-08-04 00:21:20,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 268 flow [2023-08-04 00:21:20,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 261 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:21:20,259 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 147 flow [2023-08-04 00:21:20,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2023-08-04 00:21:20,261 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-04 00:21:20,261 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 147 flow [2023-08-04 00:21:20,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:20,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:20,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:20,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:21:20,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:20,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1367556164, now seen corresponding path program 1 times [2023-08-04 00:21:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559716837] [2023-08-04 00:21:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:21:20,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:20,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559716837] [2023-08-04 00:21:20,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559716837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:20,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789884988] [2023-08-04 00:21:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:20,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:20,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:20,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:21:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:20,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:21:20,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:21:20,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:21:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789884988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:20,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:21:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937938803] [2023-08-04 00:21:20,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:20,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:21:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:21:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:20,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2023-08-04 00:21:20,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:20,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:20,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2023-08-04 00:21:20,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:22,008 INFO L124 PetriNetUnfolderBase]: 17362/22642 cut-off events. [2023-08-04 00:21:22,008 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 00:21:22,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48187 conditions, 22642 events. 17362/22642 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 115422 event pairs, 6886 based on Foata normal form. 243/22884 useless extension candidates. Maximal degree in co-relation 17108. Up to 11794 conditions per place. [2023-08-04 00:21:22,123 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 52 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-08-04 00:21:22,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 307 flow [2023-08-04 00:21:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:21:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:21:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 00:21:22,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5890243902439024 [2023-08-04 00:21:22,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 00:21:22,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 00:21:22,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:22,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 00:21:22,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:22,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:22,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:22,128 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 147 flow. Second operand 4 states and 483 transitions. [2023-08-04 00:21:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 307 flow [2023-08-04 00:21:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 300 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:21:22,132 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 154 flow [2023-08-04 00:21:22,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-04 00:21:22,132 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 00:21:22,132 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 154 flow [2023-08-04 00:21:22,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:22,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:22,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:22,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:22,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:21:22,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:22,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 887512599, now seen corresponding path program 1 times [2023-08-04 00:21:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:22,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606765693] [2023-08-04 00:21:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:21:22,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606765693] [2023-08-04 00:21:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606765693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:21:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853189514] [2023-08-04 00:21:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:21:22,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 205 [2023-08-04 00:21:22,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:22,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:22,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 205 [2023-08-04 00:21:22,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:25,969 INFO L124 PetriNetUnfolderBase]: 44464/57840 cut-off events. [2023-08-04 00:21:25,969 INFO L125 PetriNetUnfolderBase]: For 26796/26796 co-relation queries the response was YES. [2023-08-04 00:21:26,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133170 conditions, 57840 events. 44464/57840 cut-off events. For 26796/26796 co-relation queries the response was YES. Maximal size of possible extension queue 2182. Compared 324888 event pairs, 15516 based on Foata normal form. 973/58769 useless extension candidates. Maximal degree in co-relation 133095. Up to 38149 conditions per place. [2023-08-04 00:21:26,312 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 56 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-08-04 00:21:26,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 416 flow [2023-08-04 00:21:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 00:21:26,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2023-08-04 00:21:26,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 00:21:26,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 00:21:26,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:26,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 00:21:26,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:26,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:26,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:26,316 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 154 flow. Second operand 3 states and 363 transitions. [2023-08-04 00:21:26,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 416 flow [2023-08-04 00:21:26,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 402 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:21:26,389 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 217 flow [2023-08-04 00:21:26,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-04 00:21:26,390 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-04 00:21:26,390 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 217 flow [2023-08-04 00:21:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:26,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:26,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:26,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:21:26,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:26,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1737497175, now seen corresponding path program 1 times [2023-08-04 00:21:26,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:26,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487904572] [2023-08-04 00:21:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:26,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:21:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487904572] [2023-08-04 00:21:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487904572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:26,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:26,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:21:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586384855] [2023-08-04 00:21:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:26,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:21:26,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 205 [2023-08-04 00:21:26,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:26,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:26,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 205 [2023-08-04 00:21:26,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:29,693 INFO L124 PetriNetUnfolderBase]: 38065/50485 cut-off events. [2023-08-04 00:21:29,693 INFO L125 PetriNetUnfolderBase]: For 41048/41120 co-relation queries the response was YES. [2023-08-04 00:21:29,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144528 conditions, 50485 events. 38065/50485 cut-off events. For 41048/41120 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 300688 event pairs, 8044 based on Foata normal form. 80/49978 useless extension candidates. Maximal degree in co-relation 57062. Up to 45228 conditions per place. [2023-08-04 00:21:30,047 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 60 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-04 00:21:30,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 477 flow [2023-08-04 00:21:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-04 00:21:30,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6113821138211382 [2023-08-04 00:21:30,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-04 00:21:30,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-04 00:21:30,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:30,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-04 00:21:30,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:30,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:30,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:30,051 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 217 flow. Second operand 3 states and 376 transitions. [2023-08-04 00:21:30,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 477 flow [2023-08-04 00:21:30,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 447 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:21:30,273 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 240 flow [2023-08-04 00:21:30,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=3, PETRI_FLOW=240, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-04 00:21:30,274 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2023-08-04 00:21:30,274 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 240 flow [2023-08-04 00:21:30,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:30,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:30,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:21:30,274 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:30,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1743086282, now seen corresponding path program 1 times [2023-08-04 00:21:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:30,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504484418] [2023-08-04 00:21:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:21:30,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504484418] [2023-08-04 00:21:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504484418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:30,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:21:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781158698] [2023-08-04 00:21:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:21:30,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2023-08-04 00:21:30,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:30,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:30,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2023-08-04 00:21:30,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:33,875 INFO L124 PetriNetUnfolderBase]: 43672/56231 cut-off events. [2023-08-04 00:21:33,875 INFO L125 PetriNetUnfolderBase]: For 41973/41973 co-relation queries the response was YES. [2023-08-04 00:21:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158824 conditions, 56231 events. 43672/56231 cut-off events. For 41973/41973 co-relation queries the response was YES. Maximal size of possible extension queue 2082. Compared 305040 event pairs, 14834 based on Foata normal form. 27/56239 useless extension candidates. Maximal degree in co-relation 60032. Up to 54537 conditions per place. [2023-08-04 00:21:34,455 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 66 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-08-04 00:21:34,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 518 flow [2023-08-04 00:21:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-04 00:21:34,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2023-08-04 00:21:34,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-04 00:21:34,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-04 00:21:34,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:34,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-04 00:21:34,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:34,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:34,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:34,459 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 240 flow. Second operand 3 states and 372 transitions. [2023-08-04 00:21:34,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 518 flow [2023-08-04 00:21:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:34,475 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 294 flow [2023-08-04 00:21:34,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-08-04 00:21:34,476 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2023-08-04 00:21:34,476 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 294 flow [2023-08-04 00:21:34,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:34,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:34,476 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] [2023-08-04 00:21:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:21:34,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:34,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1213892913, now seen corresponding path program 1 times [2023-08-04 00:21:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080350718] [2023-08-04 00:21:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:21:34,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080350718] [2023-08-04 00:21:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080350718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994555615] [2023-08-04 00:21:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:34,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:34,601 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:34,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:21:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:34,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 00:21:34,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:21:34,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:21:34,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994555615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:34,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:21:34,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2] total 3 [2023-08-04 00:21:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771543922] [2023-08-04 00:21:34,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:21:34,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 205 [2023-08-04 00:21:34,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:34,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:34,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 205 [2023-08-04 00:21:34,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:37,897 INFO L124 PetriNetUnfolderBase]: 35732/47243 cut-off events. [2023-08-04 00:21:37,897 INFO L125 PetriNetUnfolderBase]: For 49671/52542 co-relation queries the response was YES. [2023-08-04 00:21:38,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139550 conditions, 47243 events. 35732/47243 cut-off events. For 49671/52542 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 273342 event pairs, 21050 based on Foata normal form. 637/47151 useless extension candidates. Maximal degree in co-relation 139467. Up to 41943 conditions per place. [2023-08-04 00:21:38,231 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 78 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-04 00:21:38,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 655 flow [2023-08-04 00:21:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:21:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:21:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-04 00:21:38,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2023-08-04 00:21:38,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-04 00:21:38,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-04 00:21:38,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:38,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-04 00:21:38,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:38,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:38,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:38,235 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 294 flow. Second operand 3 states and 381 transitions. [2023-08-04 00:21:38,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 655 flow [2023-08-04 00:21:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 646 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:38,265 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 328 flow [2023-08-04 00:21:38,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-04 00:21:38,265 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2023-08-04 00:21:38,265 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 328 flow [2023-08-04 00:21:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:38,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:38,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:38,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:38,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:38,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1799101445, now seen corresponding path program 1 times [2023-08-04 00:21:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:38,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663524670] [2023-08-04 00:21:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:38,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 00:21:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663524670] [2023-08-04 00:21:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663524670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:21:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597829238] [2023-08-04 00:21:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:38,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:21:38,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:21:38,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:21:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:38,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 00:21:38,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:21:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:21:38,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:21:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:21:38,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597829238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:21:38,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:21:38,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2023-08-04 00:21:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580916375] [2023-08-04 00:21:38,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:21:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 00:21:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 00:21:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-04 00:21:38,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 205 [2023-08-04 00:21:38,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 328 flow. Second operand has 8 states, 8 states have (on average 104.75) internal successors, (838), 8 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:38,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:38,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 205 [2023-08-04 00:21:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:21:56,680 INFO L124 PetriNetUnfolderBase]: 210667/268590 cut-off events. [2023-08-04 00:21:56,680 INFO L125 PetriNetUnfolderBase]: For 331618/331618 co-relation queries the response was YES. [2023-08-04 00:21:57,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804863 conditions, 268590 events. 210667/268590 cut-off events. For 331618/331618 co-relation queries the response was YES. Maximal size of possible extension queue 8986. Compared 1662179 event pairs, 25588 based on Foata normal form. 5328/273898 useless extension candidates. Maximal degree in co-relation 542032. Up to 74168 conditions per place. [2023-08-04 00:21:58,349 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 235 selfloop transitions, 61 changer transitions 32/331 dead transitions. [2023-08-04 00:21:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 331 transitions, 2337 flow [2023-08-04 00:21:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 00:21:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 00:21:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1326 transitions. [2023-08-04 00:21:58,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880266075388026 [2023-08-04 00:21:58,352 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1326 transitions. [2023-08-04 00:21:58,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1326 transitions. [2023-08-04 00:21:58,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:21:58,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1326 transitions. [2023-08-04 00:21:58,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.54545454545455) internal successors, (1326), 11 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:58,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:58,358 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:58,359 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 328 flow. Second operand 11 states and 1326 transitions. [2023-08-04 00:21:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 331 transitions, 2337 flow [2023-08-04 00:21:58,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 331 transitions, 2328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:21:58,436 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 957 flow [2023-08-04 00:21:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=957, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2023-08-04 00:21:58,436 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2023-08-04 00:21:58,436 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 957 flow [2023-08-04 00:21:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.75) internal successors, (838), 8 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:21:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:21:58,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 00:21:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:21:58,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:21:58,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:21:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2122721451, now seen corresponding path program 1 times [2023-08-04 00:21:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:21:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251247544] [2023-08-04 00:21:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:21:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:21:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:21:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:21:58,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:21:58,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251247544] [2023-08-04 00:21:58,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251247544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:21:58,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:21:58,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:21:58,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118027995] [2023-08-04 00:21:58,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:21:58,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:21:58,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:21:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:21:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:21:58,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 205 [2023-08-04 00:21:58,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 957 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:21:58,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:21:58,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 205 [2023-08-04 00:21:58,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:13,104 INFO L124 PetriNetUnfolderBase]: 124839/163546 cut-off events. [2023-08-04 00:22:13,104 INFO L125 PetriNetUnfolderBase]: For 634815/651378 co-relation queries the response was YES. [2023-08-04 00:22:14,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608546 conditions, 163546 events. 124839/163546 cut-off events. For 634815/651378 co-relation queries the response was YES. Maximal size of possible extension queue 7245. Compared 1089170 event pairs, 23857 based on Foata normal form. 2855/163390 useless extension candidates. Maximal degree in co-relation 350227. Up to 151618 conditions per place. [2023-08-04 00:22:14,503 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 167 selfloop transitions, 7 changer transitions 0/197 dead transitions. [2023-08-04 00:22:14,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 1970 flow [2023-08-04 00:22:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:22:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:22:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 00:22:14,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2023-08-04 00:22:14,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 00:22:14,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 00:22:14,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:14,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 00:22:14,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:14,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:14,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:14,506 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 957 flow. Second operand 3 states and 370 transitions. [2023-08-04 00:22:14,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 1970 flow [2023-08-04 00:22:17,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 197 transitions, 1895 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-04 00:22:17,899 INFO L231 Difference]: Finished difference. Result has 90 places, 123 transitions, 961 flow [2023-08-04 00:22:17,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=961, PETRI_PLACES=90, PETRI_TRANSITIONS=123} [2023-08-04 00:22:17,899 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2023-08-04 00:22:17,900 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 123 transitions, 961 flow [2023-08-04 00:22:17,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:17,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:22:17,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:22:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 00:22:17,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:22:17,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:22:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2046970102, now seen corresponding path program 1 times [2023-08-04 00:22:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:22:17,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088207127] [2023-08-04 00:22:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:22:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:22:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:22:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088207127] [2023-08-04 00:22:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088207127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:22:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405893017] [2023-08-04 00:22:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:22:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:22:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:22:18,005 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:22:18,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 00:22:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:22:18,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 00:22:18,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:22:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:22:18,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:22:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:22:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405893017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:22:18,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:22:18,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 16 [2023-08-04 00:22:18,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768048586] [2023-08-04 00:22:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:22:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 00:22:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:22:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 00:22:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2023-08-04 00:22:18,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-04 00:22:18,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 123 transitions, 961 flow. Second operand has 17 states, 17 states have (on average 94.94117647058823) internal successors, (1614), 17 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:18,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:22:18,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-04 00:22:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:22:42,667 INFO L124 PetriNetUnfolderBase]: 194876/254087 cut-off events. [2023-08-04 00:22:42,667 INFO L125 PetriNetUnfolderBase]: For 838646/838646 co-relation queries the response was YES. [2023-08-04 00:22:44,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046681 conditions, 254087 events. 194876/254087 cut-off events. For 838646/838646 co-relation queries the response was YES. Maximal size of possible extension queue 9149. Compared 1656830 event pairs, 3006 based on Foata normal form. 10296/264228 useless extension candidates. Maximal degree in co-relation 1046550. Up to 104827 conditions per place. [2023-08-04 00:22:44,868 INFO L140 encePairwiseOnDemand]: 186/205 looper letters, 402 selfloop transitions, 383 changer transitions 33/821 dead transitions. [2023-08-04 00:22:44,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 821 transitions, 7826 flow [2023-08-04 00:22:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 00:22:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 00:22:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2162 transitions. [2023-08-04 00:22:44,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5550706033376124 [2023-08-04 00:22:44,873 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2162 transitions. [2023-08-04 00:22:44,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2162 transitions. [2023-08-04 00:22:44,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:22:44,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2162 transitions. [2023-08-04 00:22:44,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.78947368421052) internal successors, (2162), 19 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:44,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:44,883 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 205.0) internal successors, (4100), 20 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:22:44,883 INFO L175 Difference]: Start difference. First operand has 90 places, 123 transitions, 961 flow. Second operand 19 states and 2162 transitions. [2023-08-04 00:22:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 821 transitions, 7826 flow [2023-08-04 00:23:12,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 821 transitions, 7789 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:23:12,141 INFO L231 Difference]: Finished difference. Result has 122 places, 465 transitions, 5082 flow [2023-08-04 00:23:12,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5082, PETRI_PLACES=122, PETRI_TRANSITIONS=465} [2023-08-04 00:23:12,142 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-08-04 00:23:12,142 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 465 transitions, 5082 flow [2023-08-04 00:23:12,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 94.94117647058823) internal successors, (1614), 17 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:23:12,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:23:12,142 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, 1] [2023-08-04 00:23:12,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 00:23:12,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 00:23:12,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:23:12,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:23:12,345 INFO L85 PathProgramCache]: Analyzing trace with hash 775983746, now seen corresponding path program 1 times [2023-08-04 00:23:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:23:12,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579999470] [2023-08-04 00:23:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:23:12,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:23:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:23:12,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:23:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:23:12,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:23:12,387 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:23:12,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 00:23:12,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 00:23:12,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:23:12,388 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 00:23:12,390 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:23:12,390 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:23:12,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:23:12 BasicIcfg [2023-08-04 00:23:12,475 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:23:12,475 INFO L158 Benchmark]: Toolchain (without parser) took 142704.82ms. Allocated memory was 597.7MB in the beginning and 15.9GB in the end (delta: 15.3GB). Free memory was 543.0MB in the beginning and 13.5GB in the end (delta: -12.9GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. [2023-08-04 00:23:12,475 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 335.5MB. Free memory is still 281.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:23:12,476 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.55ms. Allocated memory is still 597.7MB. Free memory was 543.0MB in the beginning and 522.4MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 00:23:12,476 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.31ms. Allocated memory is still 597.7MB. Free memory was 522.4MB in the beginning and 520.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:23:12,477 INFO L158 Benchmark]: Boogie Preprocessor took 48.74ms. Allocated memory is still 597.7MB. Free memory was 520.3MB in the beginning and 518.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:23:12,477 INFO L158 Benchmark]: RCFGBuilder took 328.77ms. Allocated memory is still 597.7MB. Free memory was 518.5MB in the beginning and 503.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 00:23:12,477 INFO L158 Benchmark]: TraceAbstraction took 141823.13ms. Allocated memory was 597.7MB in the beginning and 15.9GB in the end (delta: 15.3GB). Free memory was 503.2MB in the beginning and 13.5GB in the end (delta: -13.0GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. [2023-08-04 00:23:12,479 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 335.5MB. Free memory is still 281.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 437.55ms. Allocated memory is still 597.7MB. Free memory was 543.0MB in the beginning and 522.4MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.31ms. Allocated memory is still 597.7MB. Free memory was 522.4MB in the beginning and 520.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.74ms. Allocated memory is still 597.7MB. Free memory was 520.3MB in the beginning and 518.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 328.77ms. Allocated memory is still 597.7MB. Free memory was 518.5MB in the beginning and 503.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 141823.13ms. Allocated memory was 597.7MB in the beginning and 15.9GB in the end (delta: 15.3GB). Free memory was 503.2MB in the beginning and 13.5GB in the end (delta: -13.0GB). Peak memory consumption was 2.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 81 PlacesBefore, 29 PlacesAfterwards, 76 TransitionsBefore, 22 TransitionsAfterwards, 1072 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 59 TotalNumberOfCompositions, 1933 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1406, independent: 1345, independent conditional: 0, independent unconditional: 1345, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 595, independent: 583, independent conditional: 0, independent unconditional: 583, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1406, independent: 762, independent conditional: 0, independent unconditional: 762, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 595, unknown conditional: 0, unknown unconditional: 595] , Statistics on independence cache: Total cache size (in pairs): 73, Positive cache size: 68, Positive conditional cache size: 0, Positive unconditional cache size: 68, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 107 PlacesBefore, 49 PlacesAfterwards, 96 TransitionsBefore, 36 TransitionsAfterwards, 2828 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 65 TotalNumberOfCompositions, 5939 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2893, independent: 2774, independent conditional: 0, independent unconditional: 2774, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1396, independent: 1368, independent conditional: 0, independent unconditional: 1368, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2893, independent: 1406, independent conditional: 0, independent unconditional: 1406, dependent: 91, dependent conditional: 0, dependent unconditional: 91, unknown: 1396, unknown conditional: 0, unknown unconditional: 1396] , Statistics on independence cache: Total cache size (in pairs): 176, Positive cache size: 163, Positive conditional cache size: 0, Positive unconditional cache size: 163, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 118 PlacesBefore, 49 PlacesAfterwards, 109 TransitionsBefore, 37 TransitionsAfterwards, 3776 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 7382 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3333, independent: 3205, independent conditional: 0, independent unconditional: 3205, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1870, independent: 1829, independent conditional: 0, independent unconditional: 1829, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3333, independent: 1376, independent conditional: 0, independent unconditional: 1376, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 1870, unknown conditional: 0, unknown unconditional: 1870] , Statistics on independence cache: Total cache size (in pairs): 142, Positive cache size: 126, Positive conditional cache size: 0, Positive unconditional cache size: 126, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p0_EAX = 0; [L713] 0 int __unbuffered_p1_EAX = 0; [L714] 0 _Bool main$tmp_guard0; [L715] 0 _Bool main$tmp_guard1; [L717] 0 int x = 0; [L719] 0 int y = 0; [L773] 0 pthread_t t1991[2]; [L774] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, x=0, y=0] [L774] COND TRUE 0 asdf<2 [L774] FCALL, FORK 0 pthread_create(&t1991[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1991[asdf], ((void *)0), P0, ((void *)0))=-5, t1991={5:0}, x=0, y=0] [L774] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, x=0, y=0] [L774] COND TRUE 0 asdf<2 [L774] FCALL, FORK 0 pthread_create(&t1991[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1991[asdf], ((void *)0), P0, ((void *)0))=-4, t1991={5:0}, x=0, y=0] [L774] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, x=0, y=0] [L774] COND FALSE 0 !(asdf<2) [L775] 0 pthread_t t1992[2]; [L776] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, x=0, y=0] [L776] COND TRUE 0 asdf<2 [L776] FCALL, FORK 0 pthread_create(&t1992[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1992[asdf], ((void *)0), P1, ((void *)0))=-3, t1991={5:0}, t1992={6:0}, x=0, y=0] [L776] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, x=0, y=0] [L776] COND TRUE 0 asdf<2 [L776] FCALL, FORK 0 pthread_create(&t1992[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1992[asdf], ((void *)0), P1, ((void *)0))=-2, t1991={5:0}, t1992={6:0}, x=0, y=0] [L776] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, x=0, y=0] [L776] COND FALSE 0 !(asdf<2) [L777] 0 pthread_t t1993[2]; [L778] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, t1993={3:0}, x=0, y=0] [L778] COND TRUE 0 asdf<2 [L778] FCALL, FORK 0 pthread_create(&t1993[asdf], ((void *)0), P2, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1993[asdf], ((void *)0), P2, ((void *)0))=-1, t1991={5:0}, t1992={6:0}, t1993={3:0}, x=0, y=0] [L778] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, t1993={3:0}, x=0, y=0] [L778] COND TRUE 0 asdf<2 [L778] FCALL, FORK 0 pthread_create(&t1993[asdf], ((void *)0), P2, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1993[asdf], ((void *)0), P2, ((void *)0))=0, t1991={5:0}, t1992={6:0}, t1993={3:0}, x=0, y=0] [L753] 5 y = 2 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L753] 6 y = 2 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L778] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1991={5:0}, t1992={6:0}, t1993={3:0}, x=0, y=2] [L758] 5 __unbuffered_cnt = __unbuffered_cnt + 1 [L760] 5 return 0; [L723] 2 __unbuffered_p0_EAX = y VAL [\result={0:0}, __unbuffered_cnt=1, __unbuffered_p0_EAX=2, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L726] 2 x = 1 VAL [\result={0:0}, __unbuffered_cnt=1, __unbuffered_p0_EAX=2, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=2] [L738] 4 __unbuffered_p1_EAX = x VAL [\result={0:0}, __unbuffered_cnt=1, __unbuffered_p0_EAX=2, __unbuffered_p1_EAX=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=2] [L731] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L733] 2 return 0; [L758] 6 __unbuffered_cnt = __unbuffered_cnt + 1 [L760] 6 return 0; [L778] COND FALSE 0 !(asdf<2) [L780] 0 main$tmp_guard0 = __unbuffered_cnt == 3 [L782] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) [L782] RET 0 assume_abort_if_not(main$tmp_guard0) [L786] 0 main$tmp_guard1 = !(y == 2 && __unbuffered_p0_EAX == 2 && __unbuffered_p1_EAX == 1) [L788] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, \result={0:0}, __unbuffered_cnt=3, __unbuffered_p0_EAX=2, __unbuffered_p1_EAX=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=1, y=2] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 120 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 140 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 255 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 194 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 594 IncrementalHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 2 mSDtfsCounter, 594 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 684 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 124/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 140 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 127.0s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 121.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1110 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 967 mSDsluCounter, 181 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 123 mSDsCounter, 198 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2035 IncrementalHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 198 mSolverCounterUnsat, 58 mSDtfsCounter, 2035 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 346 GetRequests, 279 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5082occurred in iteration=13, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 528 NumberOfCodeBlocks, 528 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 594 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1402 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 251/294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 00:23:12,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...