/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_ok_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:45:44,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:45:44,081 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:45:44,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:45:44,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:45:44,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:45:44,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:45:44,112 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:45:44,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:45:44,116 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:45:44,116 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:45:44,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:45:44,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:45:44,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:45:44,118 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:45:44,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:45:44,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:45:44,118 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:45:44,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:45:44,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:45:44,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:45:44,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:45:44,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:45:44,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:45:44,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:45:44,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:45:44,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:45:44,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:45:44,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:45:44,123 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:45:44,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:45:44,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:45:44,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:45:44,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:45:44,314 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:45:44,315 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:45:44,315 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-04 04:45:45,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:45:45,455 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:45:45,455 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-04 04:45:45,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/810ab38fa/73db25294c3b4aab8e9e090a1da55c3f/FLAGe1f2fd308 [2023-08-04 04:45:45,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/810ab38fa/73db25294c3b4aab8e9e090a1da55c3f [2023-08-04 04:45:45,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:45:45,482 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:45:45,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:45:45,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:45:45,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:45:45,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:45,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4745a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45, skipping insertion in model container [2023-08-04 04:45:45,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:45,527 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:45:45,824 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-deagle_arithmetic_prog_ok_bound2.i[39919,39932] [2023-08-04 04:45:45,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:45:45,835 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:45:45,858 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [218] [2023-08-04 04:45:45,859 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [219] [2023-08-04 04:45:45,864 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [730] [2023-08-04 04:45:45,867 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned long [871] [2023-08-04 04:45:45,884 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-deagle_arithmetic_prog_ok_bound2.i[39919,39932] [2023-08-04 04:45:45,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:45:45,929 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:45:45,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45 WrapperNode [2023-08-04 04:45:45,931 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:45:45,932 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:45:45,932 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:45:45,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:45:45,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:45,961 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:45,985 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 113 [2023-08-04 04:45:45,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:45:45,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:45:45,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:45:45,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:45:45,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:45,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,008 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,014 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,016 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,019 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:45:46,019 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:45:46,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:45:46,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:45:46,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (1/1) ... [2023-08-04 04:45:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:45:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:46,050 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 04:45:46,058 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 04:45:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:45:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:45:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-04 04:45:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:45:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 04:45:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 04:45:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 04:45:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 04:45:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:45:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:45:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:45:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:45:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:45:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:45:46,082 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 04:45:46,185 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:45:46,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:45:46,364 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:45:46,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:45:46,369 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 04:45:46,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:45:46 BoogieIcfgContainer [2023-08-04 04:45:46,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:45:46,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:45:46,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:45:46,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:45:46,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:45:45" (1/3) ... [2023-08-04 04:45:46,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783db2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:45:46, skipping insertion in model container [2023-08-04 04:45:46,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:45" (2/3) ... [2023-08-04 04:45:46,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783db2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:45:46, skipping insertion in model container [2023-08-04 04:45:46,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:45:46" (3/3) ... [2023-08-04 04:45:46,380 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-deagle_arithmetic_prog_ok_bound2.i [2023-08-04 04:45:46,385 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:45:46,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:45:46,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:45:46,392 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:45:46,460 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 04:45:46,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,599 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:46,623 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:46,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:46,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:46,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:46,701 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:46,701 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:46,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:46,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-04 04:45:51,426 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-04 04:45:51,426 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 04:45:51,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:45:51,447 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;@74e3e441, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:45:51,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:45:51,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:45:51,453 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-04 04:45:51,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:45:51,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:51,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:45:51,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:51,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 869736262, now seen corresponding path program 1 times [2023-08-04 04:45:51,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126759912] [2023-08-04 04:45:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:51,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:51,652 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 04:45:51,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126759912] [2023-08-04 04:45:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126759912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:51,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:45:51,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:45:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539860020] [2023-08-04 04:45:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:51,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:45:51,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:51,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:51,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:51,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:51,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:51,858 INFO L124 PetriNetUnfolderBase]: 889/1586 cut-off events. [2023-08-04 04:45:51,859 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-04 04:45:51,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1586 events. 889/1586 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8825 event pairs, 342 based on Foata normal form. 133/1312 useless extension candidates. Maximal degree in co-relation 2627. Up to 1316 conditions per place. [2023-08-04 04:45:51,865 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 37 selfloop transitions, 2 changer transitions 5/55 dead transitions. [2023-08-04 04:45:51,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 216 flow [2023-08-04 04:45:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 04:45:51,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539080459770115 [2023-08-04 04:45:51,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 04:45:51,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 04:45:51,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:51,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 04:45:51,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:51,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:51,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:51,895 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 122 flow. Second operand 3 states and 469 transitions. [2023-08-04 04:45:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 216 flow [2023-08-04 04:45:51,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:45:51,900 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 114 flow [2023-08-04 04:45:51,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-04 04:45:51,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 04:45:51,903 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 114 flow [2023-08-04 04:45:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:51,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:51,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:51,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:45:51,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:51,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 268064275, now seen corresponding path program 1 times [2023-08-04 04:45:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525654913] [2023-08-04 04:45:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:52,015 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 04:45:52,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525654913] [2023-08-04 04:45:52,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525654913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685421728] [2023-08-04 04:45:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:52,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:52,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:52,019 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 04:45:52,037 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 04:45:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:52,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:52,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:52,116 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 04:45:52,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:52,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685421728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:52,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:52,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:52,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978951682] [2023-08-04 04:45:52,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:52,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:52,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 04:45:52,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:52,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:52,264 INFO L124 PetriNetUnfolderBase]: 758/1236 cut-off events. [2023-08-04 04:45:52,264 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 04:45:52,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 1236 events. 758/1236 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5933 event pairs, 276 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 2396. Up to 1054 conditions per place. [2023-08-04 04:45:52,270 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 44 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 04:45:52,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 236 flow [2023-08-04 04:45:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 04:45:52,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413793103448276 [2023-08-04 04:45:52,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 04:45:52,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 04:45:52,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:52,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 04:45:52,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:52,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:52,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:52,281 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 114 flow. Second operand 3 states and 471 transitions. [2023-08-04 04:45:52,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 236 flow [2023-08-04 04:45:52,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 04:45:52,284 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 112 flow [2023-08-04 04:45:52,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 04:45:52,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 04:45:52,285 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 112 flow [2023-08-04 04:45:52,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 04:45:52,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:52,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:52,293 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 04:45:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:52,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:52,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash -566865060, now seen corresponding path program 1 times [2023-08-04 04:45:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:52,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740931987] [2023-08-04 04:45:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:52,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:52,538 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 04:45:52,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740931987] [2023-08-04 04:45:52,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740931987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:52,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975178341] [2023-08-04 04:45:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:52,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:52,540 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 04:45:52,547 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 04:45:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:52,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:52,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:52,622 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 04:45:52,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975178341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:52,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:52,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:52,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755443866] [2023-08-04 04:45:52,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:52,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:52,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:52,752 INFO L124 PetriNetUnfolderBase]: 450/816 cut-off events. [2023-08-04 04:45:52,752 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-04 04:45:52,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 816 events. 450/816 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3782 event pairs, 192 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 1304. Up to 487 conditions per place. [2023-08-04 04:45:52,755 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 04:45:52,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 250 flow [2023-08-04 04:45:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 04:45:52,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2023-08-04 04:45:52,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 04:45:52,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 04:45:52,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:52,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 04:45:52,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 04:45:52,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:52,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:52,759 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 112 flow. Second operand 3 states and 474 transitions. [2023-08-04 04:45:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 250 flow [2023-08-04 04:45:52,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:45:52,760 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-08-04 04:45:52,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-04 04:45:52,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 04:45:52,761 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-08-04 04:45:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:52,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:52,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:52,768 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 04:45:52,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 04:45:52,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:52,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1135055713, now seen corresponding path program 1 times [2023-08-04 04:45:52,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:52,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472781722] [2023-08-04 04:45:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:53,007 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 04:45:53,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:53,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472781722] [2023-08-04 04:45:53,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472781722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:53,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039539657] [2023-08-04 04:45:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:53,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:53,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:53,009 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 04:45:53,015 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 04:45:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:53,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:53,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:53,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039539657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:53,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65443702] [2023-08-04 04:45:53,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:53,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:53,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:53,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:53,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 04:45:53,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:53,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:53,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:53,220 INFO L124 PetriNetUnfolderBase]: 705/1454 cut-off events. [2023-08-04 04:45:53,220 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2023-08-04 04:45:53,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 1454 events. 705/1454 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8386 event pairs, 300 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1420. Up to 713 conditions per place. [2023-08-04 04:45:53,225 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 56 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 04:45:53,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 307 flow [2023-08-04 04:45:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-04 04:45:53,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540229885057472 [2023-08-04 04:45:53,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-04 04:45:53,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-04 04:45:53,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:53,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-04 04:45:53,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 04:45:53,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:53,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:53,229 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 482 transitions. [2023-08-04 04:45:53,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 307 flow [2023-08-04 04:45:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:53,231 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 130 flow [2023-08-04 04:45:53,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-04 04:45:53,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 04:45:53,231 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 130 flow [2023-08-04 04:45:53,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 04:45:53,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:53,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:53,238 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 04:45:53,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:53,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:53,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash -237614458, now seen corresponding path program 1 times [2023-08-04 04:45:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148406127] [2023-08-04 04:45:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:53,493 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 04:45:53,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148406127] [2023-08-04 04:45:53,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148406127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540130635] [2023-08-04 04:45:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:53,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:53,502 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 04:45:53,507 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 04:45:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:53,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:53,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:53,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:53,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540130635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:53,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:53,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:53,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815058262] [2023-08-04 04:45:53,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:53,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:53,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:53,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:53,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:53,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:53,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:53,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:53,729 INFO L124 PetriNetUnfolderBase]: 1019/2040 cut-off events. [2023-08-04 04:45:53,729 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-08-04 04:45:53,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 2040 events. 1019/2040 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11998 event pairs, 482 based on Foata normal form. 0/1850 useless extension candidates. Maximal degree in co-relation 2669. Up to 1094 conditions per place. [2023-08-04 04:45:53,737 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 53 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 04:45:53,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 305 flow [2023-08-04 04:45:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 04:45:53,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482758620689655 [2023-08-04 04:45:53,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 04:45:53,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 04:45:53,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:53,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 04:45:53,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:53,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:53,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:53,768 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 130 flow. Second operand 3 states and 477 transitions. [2023-08-04 04:45:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 305 flow [2023-08-04 04:45:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:53,769 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 140 flow [2023-08-04 04:45:53,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-04 04:45:53,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 04:45:53,770 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 140 flow [2023-08-04 04:45:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:53,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:53,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:53,779 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 04:45:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:53,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:53,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash 418197519, now seen corresponding path program 1 times [2023-08-04 04:45:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145714248] [2023-08-04 04:45:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:54,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145714248] [2023-08-04 04:45:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145714248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053924441] [2023-08-04 04:45:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:54,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:54,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:54,017 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 04:45:54,019 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 04:45:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:54,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:54,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:54,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:54,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053924441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:54,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:54,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:54,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111922138] [2023-08-04 04:45:54,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:54,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:54,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:54,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 04:45:54,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:54,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:54,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:54,232 INFO L124 PetriNetUnfolderBase]: 976/1888 cut-off events. [2023-08-04 04:45:54,232 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-08-04 04:45:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 1888 events. 976/1888 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10492 event pairs, 645 based on Foata normal form. 0/1764 useless extension candidates. Maximal degree in co-relation 2575. Up to 1394 conditions per place. [2023-08-04 04:45:54,239 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 2/63 dead transitions. [2023-08-04 04:45:54,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 294 flow [2023-08-04 04:45:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 04:45:54,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413793103448276 [2023-08-04 04:45:54,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 04:45:54,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 04:45:54,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:54,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 04:45:54,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:54,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:54,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 04:45:54,244 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 140 flow. Second operand 3 states and 471 transitions. [2023-08-04 04:45:54,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 294 flow [2023-08-04 04:45:54,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:54,246 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 142 flow [2023-08-04 04:45:54,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-04 04:45:54,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-04 04:45:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 142 flow [2023-08-04 04:45:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 04:45:54,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:54,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:54,253 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 04:45:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:54,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:54,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -123045831, now seen corresponding path program 1 times [2023-08-04 04:45:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:54,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130758781] [2023-08-04 04:45:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:54,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130758781] [2023-08-04 04:45:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130758781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160768466] [2023-08-04 04:45:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:54,517 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 04:45:54,560 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 04:45:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:54,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:45:54,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:54,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:45:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160768466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:45:54,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:45:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:45:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650825668] [2023-08-04 04:45:54,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:45:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:45:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:45:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:54,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 290 [2023-08-04 04:45:54,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 04:45:54,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:54,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 290 [2023-08-04 04:45:54,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:54,730 INFO L124 PetriNetUnfolderBase]: 23/57 cut-off events. [2023-08-04 04:45:54,730 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 57 events. 23/57 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 8/59 useless extension candidates. Maximal degree in co-relation 127. Up to 36 conditions per place. [2023-08-04 04:45:54,730 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-04 04:45:54,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 104 flow [2023-08-04 04:45:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:45:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:45:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2023-08-04 04:45:54,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982758620689655 [2023-08-04 04:45:54,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2023-08-04 04:45:54,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2023-08-04 04:45:54,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:54,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2023-08-04 04:45:54,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 04:45:54,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states 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 04:45:54,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states 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 04:45:54,734 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 142 flow. Second operand 4 states and 578 transitions. [2023-08-04 04:45:54,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 104 flow [2023-08-04 04:45:54,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:54,735 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 04:45:54,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 04:45:54,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -19 predicate places. [2023-08-04 04:45:54,736 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 04:45:54,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 04:45:54,738 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:45:54,744 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 04:45:54,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:54,942 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:54,944 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:45:54,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,966 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:54,967 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:54,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:54,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,968 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:54,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:54,984 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:54,984 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:54,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:54,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-04 04:45:59,466 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-04 04:45:59,467 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 04:45:59,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:45:59,468 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;@74e3e441, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:45:59,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:45:59,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:45:59,471 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-04 04:45:59,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:45:59,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:59,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:45:59,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:45:59,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash 413682282, now seen corresponding path program 1 times [2023-08-04 04:45:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675717018] [2023-08-04 04:45:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:45:59,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:45:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:45:59,513 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:45:59,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:45:59,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:45:59,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:45:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:45:59,514 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:45:59,515 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:45:59,515 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:45:59,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:45:59,547 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 04:45:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,641 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-04 04:45:59,641 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:45:59,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5090 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-04 04:45:59,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:59,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:59,733 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-04 04:45:59,733 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:45:59,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5090 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-04 04:45:59,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-04 04:46:03,844 INFO L134 LiptonReduction]: Checked pairs total: 53976 [2023-08-04 04:46:03,845 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-04 04:46:03,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:46:03,846 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;@74e3e441, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:46:03,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:46:03,848 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:46:03,848 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-04 04:46:03,848 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:46:03,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:03,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:46:03,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:03,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 100124577, now seen corresponding path program 1 times [2023-08-04 04:46:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:03,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087663857] [2023-08-04 04:46:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:03,865 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 04:46:03,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:03,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087663857] [2023-08-04 04:46:03,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087663857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:03,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:46:03,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:46:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162935342] [2023-08-04 04:46:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:03,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:46:03,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:03,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 04:46:03,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:03,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:03,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:08,515 INFO L124 PetriNetUnfolderBase]: 63602/91760 cut-off events. [2023-08-04 04:46:08,515 INFO L125 PetriNetUnfolderBase]: For 4662/4662 co-relation queries the response was YES. [2023-08-04 04:46:08,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173559 conditions, 91760 events. 63602/91760 cut-off events. For 4662/4662 co-relation queries the response was YES. Maximal size of possible extension queue 3333. Compared 669502 event pairs, 30330 based on Foata normal form. 9888/81383 useless extension candidates. Maximal degree in co-relation 39105. Up to 79004 conditions per place. [2023-08-04 04:46:08,959 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 57 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-04 04:46:08,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 342 flow [2023-08-04 04:46:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-04 04:46:08,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585344057193923 [2023-08-04 04:46:08,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-04 04:46:08,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-04 04:46:08,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:08,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-04 04:46:08,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:08,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:08,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:08,965 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 3 states and 625 transitions. [2023-08-04 04:46:08,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 342 flow [2023-08-04 04:46:08,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:46:08,969 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 200 flow [2023-08-04 04:46:08,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-04 04:46:08,972 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-04 04:46:08,972 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 200 flow [2023-08-04 04:46:08,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 04:46:08,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:08,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:08,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:46:08,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:08,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1542695779, now seen corresponding path program 1 times [2023-08-04 04:46:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:08,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85158642] [2023-08-04 04:46:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:08,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:09,000 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 04:46:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85158642] [2023-08-04 04:46:09,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85158642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392160027] [2023-08-04 04:46:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:09,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:09,002 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 04:46:09,003 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 04:46:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:09,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:09,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:09,083 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 04:46:09,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:09,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392160027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:09,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:09,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045444623] [2023-08-04 04:46:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:09,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:09,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:09,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:09,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:09,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:12,979 INFO L124 PetriNetUnfolderBase]: 56012/78692 cut-off events. [2023-08-04 04:46:12,979 INFO L125 PetriNetUnfolderBase]: For 3905/3905 co-relation queries the response was YES. [2023-08-04 04:46:13,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151147 conditions, 78692 events. 56012/78692 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 2917. Compared 535988 event pairs, 27168 based on Foata normal form. 0/63690 useless extension candidates. Maximal degree in co-relation 151093. Up to 69179 conditions per place. [2023-08-04 04:46:13,351 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 70 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 04:46:13,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 384 flow [2023-08-04 04:46:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-04 04:46:13,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630026809651475 [2023-08-04 04:46:13,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-04 04:46:13,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-04 04:46:13,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:13,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-04 04:46:13,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 04:46:13,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:13,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:13,364 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 200 flow. Second operand 3 states and 630 transitions. [2023-08-04 04:46:13,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 384 flow [2023-08-04 04:46:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:46:13,378 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 204 flow [2023-08-04 04:46:13,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-04 04:46:13,379 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-04 04:46:13,379 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 204 flow [2023-08-04 04:46:13,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:13,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:13,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 04:46:13,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:13,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:13,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1202511587, now seen corresponding path program 1 times [2023-08-04 04:46:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:13,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884071380] [2023-08-04 04:46:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:13,623 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 04:46:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:13,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884071380] [2023-08-04 04:46:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884071380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948597305] [2023-08-04 04:46:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:13,625 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 04:46:13,627 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 04:46:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:13,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:13,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:13,713 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 04:46:13,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:13,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948597305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:13,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:13,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523805882] [2023-08-04 04:46:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:13,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:13,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:13,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:13,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:13,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:16,430 INFO L124 PetriNetUnfolderBase]: 41376/57096 cut-off events. [2023-08-04 04:46:16,430 INFO L125 PetriNetUnfolderBase]: For 3396/3396 co-relation queries the response was YES. [2023-08-04 04:46:16,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113801 conditions, 57096 events. 41376/57096 cut-off events. For 3396/3396 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 357749 event pairs, 19358 based on Foata normal form. 0/46866 useless extension candidates. Maximal degree in co-relation 28506. Up to 37971 conditions per place. [2023-08-04 04:46:16,666 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 82 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 04:46:16,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 444 flow [2023-08-04 04:46:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 04:46:16,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-04 04:46:16,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 04:46:16,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 04:46:16,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:16,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 04:46:16,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 04:46:16,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:16,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:16,671 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 204 flow. Second operand 3 states and 641 transitions. [2023-08-04 04:46:16,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 444 flow [2023-08-04 04:46:16,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:16,673 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 214 flow [2023-08-04 04:46:16,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-04 04:46:16,674 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 04:46:16,674 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 214 flow [2023-08-04 04:46:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:16,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:16,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 04:46:16,878 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,SelfDestructingSolverStorable10 [2023-08-04 04:46:16,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:16,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:16,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1367654339, now seen corresponding path program 1 times [2023-08-04 04:46:16,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:16,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170468862] [2023-08-04 04:46:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:16,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170468862] [2023-08-04 04:46:16,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170468862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:16,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:46:16,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:46:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535894245] [2023-08-04 04:46:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:16,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:46:16,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:16,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:16,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:16,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:22,092 INFO L124 PetriNetUnfolderBase]: 63301/92856 cut-off events. [2023-08-04 04:46:22,092 INFO L125 PetriNetUnfolderBase]: For 15987/15987 co-relation queries the response was YES. [2023-08-04 04:46:22,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183926 conditions, 92856 events. 63301/92856 cut-off events. For 15987/15987 co-relation queries the response was YES. Maximal size of possible extension queue 2658. Compared 693744 event pairs, 27426 based on Foata normal form. 0/78763 useless extension candidates. Maximal degree in co-relation 87445. Up to 52445 conditions per place. [2023-08-04 04:46:22,503 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 100 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-04 04:46:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 563 flow [2023-08-04 04:46:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-04 04:46:22,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853440571939231 [2023-08-04 04:46:22,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-04 04:46:22,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-04 04:46:22,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:22,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-04 04:46:22,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 04:46:22,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:22,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:22,507 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 214 flow. Second operand 3 states and 655 transitions. [2023-08-04 04:46:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 563 flow [2023-08-04 04:46:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 125 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:22,593 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 224 flow [2023-08-04 04:46:22,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-04 04:46:22,593 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-04 04:46:22,593 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 224 flow [2023-08-04 04:46:22,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:22,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:22,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 04:46:22,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:22,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1115978806, now seen corresponding path program 1 times [2023-08-04 04:46:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:22,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351725681] [2023-08-04 04:46:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:22,623 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 04:46:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351725681] [2023-08-04 04:46:22,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351725681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770105518] [2023-08-04 04:46:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:22,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:22,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:22,625 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 04:46:22,627 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 04:46:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:22,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:22,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:22,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:22,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770105518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:22,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:22,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:22,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153617000] [2023-08-04 04:46:22,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:22,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:22,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:22,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 04:46:22,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:22,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:30,028 INFO L124 PetriNetUnfolderBase]: 86287/138754 cut-off events. [2023-08-04 04:46:30,028 INFO L125 PetriNetUnfolderBase]: For 29092/29092 co-relation queries the response was YES. [2023-08-04 04:46:30,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272513 conditions, 138754 events. 86287/138754 cut-off events. For 29092/29092 co-relation queries the response was YES. Maximal size of possible extension queue 4084. Compared 1266890 event pairs, 42603 based on Foata normal form. 0/121428 useless extension candidates. Maximal degree in co-relation 160086. Up to 79854 conditions per place. [2023-08-04 04:46:30,721 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 95 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 04:46:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 544 flow [2023-08-04 04:46:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-04 04:46:30,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579982126899017 [2023-08-04 04:46:30,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-04 04:46:30,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-04 04:46:30,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:30,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-04 04:46:30,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 04:46:30,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:30,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:30,726 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 224 flow. Second operand 3 states and 649 transitions. [2023-08-04 04:46:30,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 544 flow [2023-08-04 04:46:30,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:30,774 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 234 flow [2023-08-04 04:46:30,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-04 04:46:30,775 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 04:46:30,775 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 234 flow [2023-08-04 04:46:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 04:46:30,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:30,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:30,782 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 04:46:30,979 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,SelfDestructingSolverStorable12 [2023-08-04 04:46:30,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:30,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1395950847, now seen corresponding path program 1 times [2023-08-04 04:46:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687441068] [2023-08-04 04:46:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 04:46:31,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:31,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687441068] [2023-08-04 04:46:31,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687441068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:31,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:46:31,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:46:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686031431] [2023-08-04 04:46:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:31,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:46:31,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:31,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 04:46:31,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:31,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:31,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:41,694 INFO L124 PetriNetUnfolderBase]: 127582/183524 cut-off events. [2023-08-04 04:46:41,694 INFO L125 PetriNetUnfolderBase]: For 58795/58795 co-relation queries the response was YES. [2023-08-04 04:46:42,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395023 conditions, 183524 events. 127582/183524 cut-off events. For 58795/58795 co-relation queries the response was YES. Maximal size of possible extension queue 4711. Compared 1426848 event pairs, 58079 based on Foata normal form. 0/165318 useless extension candidates. Maximal degree in co-relation 239308. Up to 108212 conditions per place. [2023-08-04 04:46:42,866 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 101 selfloop transitions, 2 changer transitions 1/127 dead transitions. [2023-08-04 04:46:42,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 599 flow [2023-08-04 04:46:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-04 04:46:42,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844504021447721 [2023-08-04 04:46:42,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:42,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 04:46:42,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:42,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:42,872 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 234 flow. Second operand 3 states and 654 transitions. [2023-08-04 04:46:42,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 599 flow [2023-08-04 04:46:42,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 595 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:42,983 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 244 flow [2023-08-04 04:46:42,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-04 04:46:42,983 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-04 04:46:42,983 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 244 flow [2023-08-04 04:46:42,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 04:46:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:42,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:46:42,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:42,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1805492830, now seen corresponding path program 1 times [2023-08-04 04:46:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730837213] [2023-08-04 04:46:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730837213] [2023-08-04 04:46:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730837213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026274350] [2023-08-04 04:46:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:43,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:43,028 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 04:46:43,042 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 04:46:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:43,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:43,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:46:43,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:43,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026274350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:43,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:43,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:43,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104584726] [2023-08-04 04:46:43,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:43,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:43,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:43,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:43,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:43,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 04:46:43,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:43,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:52,948 INFO L124 PetriNetUnfolderBase]: 117811/162304 cut-off events. [2023-08-04 04:46:52,949 INFO L125 PetriNetUnfolderBase]: For 64190/64190 co-relation queries the response was YES. [2023-08-04 04:46:53,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370737 conditions, 162304 events. 117811/162304 cut-off events. For 64190/64190 co-relation queries the response was YES. Maximal size of possible extension queue 4026. Compared 1126679 event pairs, 70910 based on Foata normal form. 0/152288 useless extension candidates. Maximal degree in co-relation 224121. Up to 129041 conditions per place. [2023-08-04 04:46:53,788 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 89 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-04 04:46:53,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 530 flow [2023-08-04 04:46:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 04:46:53,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-04 04:46:53,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:53,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 04:46:53,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:53,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:46:53,793 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 244 flow. Second operand 3 states and 641 transitions. [2023-08-04 04:46:53,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 530 flow [2023-08-04 04:46:53,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:53,933 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 254 flow [2023-08-04 04:46:53,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2023-08-04 04:46:53,933 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2023-08-04 04:46:53,933 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 254 flow [2023-08-04 04:46:53,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 04:46:53,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:53,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:53,939 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 04:46:54,134 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 04:46:54,134 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:54,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1258425701, now seen corresponding path program 1 times [2023-08-04 04:46:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301592975] [2023-08-04 04:46:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:46:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301592975] [2023-08-04 04:46:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301592975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721563072] [2023-08-04 04:46:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:54,174 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 04:46:54,175 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 04:46:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:54,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:54,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 04:46:54,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:54,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721563072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:54,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:54,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846306373] [2023-08-04 04:46:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:54,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:54,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:54,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:54,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 04:46:54,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:54,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:54,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:08,734 INFO L124 PetriNetUnfolderBase]: 166284/244318 cut-off events. [2023-08-04 04:47:08,734 INFO L125 PetriNetUnfolderBase]: For 89414/89414 co-relation queries the response was YES. [2023-08-04 04:47:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534217 conditions, 244318 events. 166284/244318 cut-off events. For 89414/89414 co-relation queries the response was YES. Maximal size of possible extension queue 5692. Compared 2010044 event pairs, 80406 based on Foata normal form. 0/231305 useless extension candidates. Maximal degree in co-relation 457539. Up to 147085 conditions per place. [2023-08-04 04:47:10,409 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 98 selfloop transitions, 2 changer transitions 1/124 dead transitions. [2023-08-04 04:47:10,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 604 flow [2023-08-04 04:47:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:47:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:47:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-04 04:47:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579088471849866 [2023-08-04 04:47:10,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-04 04:47:10,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-04 04:47:10,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:10,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-04 04:47:10,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 04:47:10,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:47:10,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:47:10,413 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 254 flow. Second operand 3 states and 648 transitions. [2023-08-04 04:47:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 604 flow [2023-08-04 04:47:12,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:47:12,207 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 264 flow [2023-08-04 04:47:12,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-08-04 04:47:12,207 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 12 predicate places. [2023-08-04 04:47:12,207 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 264 flow [2023-08-04 04:47:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 04:47:12,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:12,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:12,212 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 04:47:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 04:47:12,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:12,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash -480583759, now seen corresponding path program 1 times [2023-08-04 04:47:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323538112] [2023-08-04 04:47:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:12,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323538112] [2023-08-04 04:47:12,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323538112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:12,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052833891] [2023-08-04 04:47:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:12,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:12,464 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 04:47:12,466 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 04:47:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:12,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:12,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:12,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:47:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:12,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052833891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:47:12,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:47:12,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:47:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61210531] [2023-08-04 04:47:12,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:47:12,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:47:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:47:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:47:12,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:12,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 04:47:12,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:12,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:12,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:26,703 INFO L124 PetriNetUnfolderBase]: 156019/217570 cut-off events. [2023-08-04 04:47:26,703 INFO L125 PetriNetUnfolderBase]: For 90002/90002 co-relation queries the response was YES. [2023-08-04 04:47:27,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505360 conditions, 217570 events. 156019/217570 cut-off events. For 90002/90002 co-relation queries the response was YES. Maximal size of possible extension queue 5099. Compared 1595940 event pairs, 66653 based on Foata normal form. 8/210306 useless extension candidates. Maximal degree in co-relation 429022. Up to 192854 conditions per place. [2023-08-04 04:47:28,329 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 78 selfloop transitions, 3 changer transitions 1/105 dead transitions. [2023-08-04 04:47:28,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 498 flow [2023-08-04 04:47:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:47:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:47:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 813 transitions. [2023-08-04 04:47:28,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449061662198391 [2023-08-04 04:47:28,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 813 transitions. [2023-08-04 04:47:28,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 813 transitions. [2023-08-04 04:47:28,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:28,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 813 transitions. [2023-08-04 04:47:28,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 04:47:28,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 04:47:28,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 04:47:28,334 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 264 flow. Second operand 4 states and 813 transitions. [2023-08-04 04:47:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 498 flow [2023-08-04 04:47:30,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 105 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:47:30,012 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 276 flow [2023-08-04 04:47:30,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2023-08-04 04:47:30,013 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-04 04:47:30,013 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 276 flow [2023-08-04 04:47:30,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 04:47:30,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:30,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:30,019 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 04:47:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 04:47:30,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:30,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1134455882, now seen corresponding path program 1 times [2023-08-04 04:47:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744221420] [2023-08-04 04:47:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:30,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 04:47:30,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744221420] [2023-08-04 04:47:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744221420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061513432] [2023-08-04 04:47:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:30,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:30,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:30,259 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 04:47:30,261 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 04:47:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:30,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:30,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 04:47:30,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:47:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061513432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:47:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:47:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 04:47:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70089587] [2023-08-04 04:47:30,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:47:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:47:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:47:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:47:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 04:47:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:43,663 INFO L124 PetriNetUnfolderBase]: 156627/217169 cut-off events. [2023-08-04 04:47:43,663 INFO L125 PetriNetUnfolderBase]: For 85590/85590 co-relation queries the response was YES. [2023-08-04 04:47:44,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503186 conditions, 217169 events. 156627/217169 cut-off events. For 85590/85590 co-relation queries the response was YES. Maximal size of possible extension queue 5005. Compared 1572676 event pairs, 67541 based on Foata normal form. 54/210397 useless extension candidates. Maximal degree in co-relation 426214. Up to 122477 conditions per place. [2023-08-04 04:47:45,043 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 100 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2023-08-04 04:47:45,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 634 flow [2023-08-04 04:47:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:47:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:47:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-04 04:47:45,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764075067024129 [2023-08-04 04:47:45,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-04 04:47:45,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-04 04:47:45,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:45,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-04 04:47:45,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 04:47:45,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:47:45,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states 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 04:47:45,048 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 276 flow. Second operand 3 states and 645 transitions. [2023-08-04 04:47:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 634 flow [2023-08-04 04:47:46,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 623 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 04:47:46,647 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 286 flow [2023-08-04 04:47:46,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-04 04:47:46,647 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-04 04:47:46,648 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 286 flow [2023-08-04 04:47:46,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 04:47:46,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:46,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:46,656 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 04:47:46,852 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,SelfDestructingSolverStorable17 [2023-08-04 04:47:46,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:46,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1716764892, now seen corresponding path program 1 times [2023-08-04 04:47:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584351721] [2023-08-04 04:47:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:46,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584351721] [2023-08-04 04:47:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584351721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:46,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106164757] [2023-08-04 04:47:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:46,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:46,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:46,919 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:47:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 04:47:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:47,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:47,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:47,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:47:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106164757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:47:47,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:47:47,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-04 04:47:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099243829] [2023-08-04 04:47:47,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:47:47,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:47:47,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:47:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:47:47,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:47,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states 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 04:47:47,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:47,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:47,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:48:16,514 INFO L124 PetriNetUnfolderBase]: 281022/419575 cut-off events. [2023-08-04 04:48:16,514 INFO L125 PetriNetUnfolderBase]: For 164023/164023 co-relation queries the response was YES. [2023-08-04 04:48:18,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947034 conditions, 419575 events. 281022/419575 cut-off events. For 164023/164023 co-relation queries the response was YES. Maximal size of possible extension queue 7960. Compared 3729889 event pairs, 44158 based on Foata normal form. 12240/410860 useless extension candidates. Maximal degree in co-relation 814895. Up to 78510 conditions per place. [2023-08-04 04:48:19,530 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 267 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2023-08-04 04:48:19,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 296 transitions, 1640 flow [2023-08-04 04:48:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:48:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:48:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1341 transitions. [2023-08-04 04:48:19,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599195710455764 [2023-08-04 04:48:19,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1341 transitions. [2023-08-04 04:48:19,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1341 transitions. [2023-08-04 04:48:19,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:48:19,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1341 transitions. [2023-08-04 04:48:19,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.5) internal successors, (1341), 6 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states 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 04:48:19,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 04:48:19,542 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states 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 04:48:19,542 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 286 flow. Second operand 6 states and 1341 transitions. [2023-08-04 04:48:19,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 296 transitions, 1640 flow [2023-08-04 04:48:21,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 296 transitions, 1629 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:48:21,058 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 323 flow [2023-08-04 04:48:21,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=323, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2023-08-04 04:48:21,058 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2023-08-04 04:48:21,058 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 323 flow [2023-08-04 04:48:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states 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 04:48:21,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:48:21,059 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:48:21,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 04:48:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:48:21,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:48:21,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:48:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash -316747039, now seen corresponding path program 1 times [2023-08-04 04:48:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:48:21,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454339414] [2023-08-04 04:48:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:48:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:48:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:48:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:48:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:48:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454339414] [2023-08-04 04:48:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454339414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:48:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876680225] [2023-08-04 04:48:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:48:21,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:48:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:48:21,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:48:21,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 04:48:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:48:21,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:48:21,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:48:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:48:21,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:48:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:48:21,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876680225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:48:21,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:48:21,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 04:48:21,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348499288] [2023-08-04 04:48:21,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:48:21,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:48:21,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:48:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:48:21,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:48:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 373 [2023-08-04 04:48:21,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:48:21,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:48:21,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 373 [2023-08-04 04:48:21,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:49:03,511 INFO L124 PetriNetUnfolderBase]: 366032/517627 cut-off events. [2023-08-04 04:49:03,511 INFO L125 PetriNetUnfolderBase]: For 392479/392479 co-relation queries the response was YES. [2023-08-04 04:49:05,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276684 conditions, 517627 events. 366032/517627 cut-off events. For 392479/392479 co-relation queries the response was YES. Maximal size of possible extension queue 9249. Compared 4239728 event pairs, 60666 based on Foata normal form. 8091/506928 useless extension candidates. Maximal degree in co-relation 1110075. Up to 161234 conditions per place. [2023-08-04 04:49:07,743 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 316 selfloop transitions, 18 changer transitions 3/360 dead transitions. [2023-08-04 04:49:07,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 360 transitions, 2163 flow [2023-08-04 04:49:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 04:49:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 04:49:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2083 transitions. [2023-08-04 04:49:07,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584450402144772 [2023-08-04 04:49:07,747 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2083 transitions. [2023-08-04 04:49:07,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2083 transitions. [2023-08-04 04:49:07,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:07,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2083 transitions. [2023-08-04 04:49:07,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 208.3) internal successors, (2083), 10 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states 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 04:49:07,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states 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 04:49:07,753 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states 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 04:49:07,753 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 323 flow. Second operand 10 states and 2083 transitions. [2023-08-04 04:49:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 360 transitions, 2163 flow [2023-08-04 04:49:15,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 360 transitions, 2091 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-04 04:49:15,199 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 463 flow [2023-08-04 04:49:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2023-08-04 04:49:15,199 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 39 predicate places. [2023-08-04 04:49:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 463 flow [2023-08-04 04:49:15,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 04:49:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:15,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 04:49:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:15,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:49:15,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash -171456513, now seen corresponding path program 1 times [2023-08-04 04:49:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419063445] [2023-08-04 04:49:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 04:49:15,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:15,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419063445] [2023-08-04 04:49:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419063445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:49:15,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:49:15,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:49:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889487150] [2023-08-04 04:49:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:49:15,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:49:15,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:49:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:49:15,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 373 [2023-08-04 04:49:15,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 463 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:15,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:15,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 373 [2023-08-04 04:49:15,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand