/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/weaver_parallel-ticket-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:58:07,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:58:07,202 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:58:07,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:58:07,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:58:07,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:58:07,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:58:07,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:58:07,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:58:07,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:58:07,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:58:07,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:58:07,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:58:07,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:58:07,227 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:58:07,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:58:07,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:58:07,229 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:58:07,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:58:07,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:58:07,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:58:07,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:58:07,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:58:07,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:58:07,231 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:58:07,231 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:58:07,232 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:58:07,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:58:07,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:58:07,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:58:07,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:58:07,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:58:07,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:58:07,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:58:07,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:58:07,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:58:07,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:58:07,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:58:07,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:58:07,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:58:07,237 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:58:07,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:58:07,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:58:07,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:58:07,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:58:07,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:58:07,441 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:58:07,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-4.wvr_bound2.c [2023-08-04 08:58:08,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:58:08,794 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:58:08,794 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-4.wvr_bound2.c [2023-08-04 08:58:08,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdb4a3f2/2c2f779aa02e498299cc52ae770f6e6b/FLAG371c870fe [2023-08-04 08:58:08,814 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdb4a3f2/2c2f779aa02e498299cc52ae770f6e6b [2023-08-04 08:58:08,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:58:08,818 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:58:08,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:58:08,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:58:08,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:58:08,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:58:08" (1/1) ... [2023-08-04 08:58:08,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f8288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:08, skipping insertion in model container [2023-08-04 08:58:08,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:58:08" (1/1) ... [2023-08-04 08:58:08,844 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:58:08,980 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-4.wvr_bound2.c[3850,3863] [2023-08-04 08:58:08,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:58:08,990 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:58:09,012 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-4.wvr_bound2.c[3850,3863] [2023-08-04 08:58:09,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:58:09,020 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:58:09,020 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:58:09,026 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:58:09,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09 WrapperNode [2023-08-04 08:58:09,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:58:09,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:58:09,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:58:09,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:58:09,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,042 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,064 INFO L138 Inliner]: procedures = 23, calls = 70, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 270 [2023-08-04 08:58:09,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:58:09,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:58:09,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:58:09,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:58:09,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:58:09,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:58:09,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:58:09,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:58:09,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (1/1) ... [2023-08-04 08:58:09,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:58:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:09,137 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 08:58:09,171 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 08:58:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:58:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:58:09,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:58:09,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:58:09,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:58:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:58:09,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:58:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:58:09,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:58:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:58:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:58:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:58:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:58:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:58:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:58:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:58:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:58:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:58:09,192 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 08:58:09,316 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:58:09,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:58:09,637 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:58:09,714 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:58:09,714 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:58:09,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:58:09 BoogieIcfgContainer [2023-08-04 08:58:09,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:58:09,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:58:09,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:58:09,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:58:09,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:58:08" (1/3) ... [2023-08-04 08:58:09,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0c69f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:58:09, skipping insertion in model container [2023-08-04 08:58:09,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:09" (2/3) ... [2023-08-04 08:58:09,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0c69f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:58:09, skipping insertion in model container [2023-08-04 08:58:09,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:58:09" (3/3) ... [2023-08-04 08:58:09,725 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-ticket-4.wvr_bound2.c [2023-08-04 08:58:09,732 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:58:09,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:58:09,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:58:09,739 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:58:09,833 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 08:58:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 211 transitions, 490 flow [2023-08-04 08:58:10,178 INFO L124 PetriNetUnfolderBase]: 239/1457 cut-off events. [2023-08-04 08:58:10,178 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:58:10,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1457 events. 239/1457 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10115 event pairs, 0 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 802. Up to 33 conditions per place. [2023-08-04 08:58:10,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 211 transitions, 490 flow [2023-08-04 08:58:10,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 195 transitions, 450 flow [2023-08-04 08:58:10,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:10,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 195 transitions, 450 flow [2023-08-04 08:58:10,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 195 transitions, 450 flow [2023-08-04 08:58:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 195 transitions, 450 flow [2023-08-04 08:58:10,381 INFO L124 PetriNetUnfolderBase]: 239/1250 cut-off events. [2023-08-04 08:58:10,382 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:58:10,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1250 events. 239/1250 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 7972 event pairs, 0 based on Foata normal form. 0/1045 useless extension candidates. Maximal degree in co-relation 692. Up to 33 conditions per place. [2023-08-04 08:58:10,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 4832 [2023-08-04 08:58:15,106 INFO L134 LiptonReduction]: Checked pairs total: 31402 [2023-08-04 08:58:15,106 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-04 08:58:15,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:58:15,132 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;@1b31eafb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:15,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:58:15,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:15,139 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-04 08:58:15,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:15,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:15,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:15,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:15,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1602940060, now seen corresponding path program 1 times [2023-08-04 08:58:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:15,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648648584] [2023-08-04 08:58:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:15,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:15,427 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 08:58:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:15,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648648584] [2023-08-04 08:58:15,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648648584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:15,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:58:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:58:15,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520280823] [2023-08-04 08:58:15,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:15,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:58:15,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:15,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 08:58:15,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:15,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:15,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:18,003 INFO L124 PetriNetUnfolderBase]: 22203/33548 cut-off events. [2023-08-04 08:58:18,004 INFO L125 PetriNetUnfolderBase]: For 2636/2636 co-relation queries the response was YES. [2023-08-04 08:58:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66858 conditions, 33548 events. 22203/33548 cut-off events. For 2636/2636 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 243649 event pairs, 14913 based on Foata normal form. 0/30122 useless extension candidates. Maximal degree in co-relation 55094. Up to 31049 conditions per place. [2023-08-04 08:58:18,243 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 58 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 08:58:18,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 322 flow [2023-08-04 08:58:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-04 08:58:18,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172735760971056 [2023-08-04 08:58:18,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-04 08:58:18,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-04 08:58:18,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:18,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-04 08:58:18,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:18,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:18,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:18,285 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 192 flow. Second operand 3 states and 554 transitions. [2023-08-04 08:58:18,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 322 flow [2023-08-04 08:58:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:58:18,312 INFO L231 Difference]: Finished difference. Result has 58 places, 66 transitions, 180 flow [2023-08-04 08:58:18,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=66} [2023-08-04 08:58:18,317 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-04 08:58:18,317 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 66 transitions, 180 flow [2023-08-04 08:58:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 08:58:18,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:18,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:58:18,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:18,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -533668308, now seen corresponding path program 1 times [2023-08-04 08:58:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:18,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652833059] [2023-08-04 08:58:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:18,431 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 08:58:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652833059] [2023-08-04 08:58:18,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652833059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:18,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896938593] [2023-08-04 08:58:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:18,439 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 08:58:18,443 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 08:58:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:18,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:18,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:18,563 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 08:58:18,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896938593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074442681] [2023-08-04 08:58:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:18,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:18,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 66 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 08:58:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:20,473 INFO L124 PetriNetUnfolderBase]: 21539/32332 cut-off events. [2023-08-04 08:58:20,478 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-08-04 08:58:20,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64508 conditions, 32332 events. 21539/32332 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 230435 event pairs, 14632 based on Foata normal form. 0/29103 useless extension candidates. Maximal degree in co-relation 64468. Up to 30013 conditions per place. [2023-08-04 08:58:20,657 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 61 selfloop transitions, 2 changer transitions 1/73 dead transitions. [2023-08-04 08:58:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 322 flow [2023-08-04 08:58:20,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 08:58:20,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200746965452848 [2023-08-04 08:58:20,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 08:58:20,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 08:58:20,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:20,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 08:58:20,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 08:58:20,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:20,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:20,667 INFO L175 Difference]: Start difference. First operand has 58 places, 66 transitions, 180 flow. Second operand 3 states and 557 transitions. [2023-08-04 08:58:20,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 322 flow [2023-08-04 08:58:20,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:20,671 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 184 flow [2023-08-04 08:58:20,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-08-04 08:58:20,672 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 08:58:20,672 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 184 flow [2023-08-04 08:58:20,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 08:58:20,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:20,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:20,682 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 08:58:20,879 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 08:58:20,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:20,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1186227028, now seen corresponding path program 1 times [2023-08-04 08:58:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:20,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554247520] [2023-08-04 08:58:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:20,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:20,984 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 08:58:20,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:20,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554247520] [2023-08-04 08:58:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554247520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943580445] [2023-08-04 08:58:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:20,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:20,990 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 08:58:20,992 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 08:58:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:21,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:21,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:21,083 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 08:58:21,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943580445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:21,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584077792] [2023-08-04 08:58:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:21,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:21,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:21,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 08:58:21,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:21,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:22,801 INFO L124 PetriNetUnfolderBase]: 21027/31340 cut-off events. [2023-08-04 08:58:22,801 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-04 08:58:22,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62812 conditions, 31340 events. 21027/31340 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 218731 event pairs, 15992 based on Foata normal form. 0/28326 useless extension candidates. Maximal degree in co-relation 22002. Up to 29079 conditions per place. [2023-08-04 08:58:22,978 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 64 selfloop transitions, 2 changer transitions 1/76 dead transitions. [2023-08-04 08:58:22,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 338 flow [2023-08-04 08:58:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-04 08:58:22,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2023-08-04 08:58:22,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-04 08:58:22,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-04 08:58:22,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:22,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-04 08:58:22,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 08:58:22,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:22,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:22,984 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 184 flow. Second operand 3 states and 560 transitions. [2023-08-04 08:58:22,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 338 flow [2023-08-04 08:58:22,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:22,987 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 188 flow [2023-08-04 08:58:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2023-08-04 08:58:22,988 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 08:58:22,988 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 188 flow [2023-08-04 08:58:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 08:58:22,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:22,989 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 08:58:22,997 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 08:58:23,195 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 08:58:23,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:23,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash -937693031, now seen corresponding path program 1 times [2023-08-04 08:58:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:23,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337024320] [2023-08-04 08:58:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:23,265 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 08:58:23,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:23,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337024320] [2023-08-04 08:58:23,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337024320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:23,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079021211] [2023-08-04 08:58:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:23,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:23,267 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 08:58:23,286 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 08:58:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:23,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:23,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:58:23,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:23,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079021211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:23,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:23,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:23,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930232044] [2023-08-04 08:58:23,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:23,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:23,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:23,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:23,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 08:58:23,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:23,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:23,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:25,038 INFO L124 PetriNetUnfolderBase]: 20963/30928 cut-off events. [2023-08-04 08:58:25,038 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2023-08-04 08:58:25,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62525 conditions, 30928 events. 20963/30928 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 209276 event pairs, 14108 based on Foata normal form. 0/28166 useless extension candidates. Maximal degree in co-relation 21931. Up to 28007 conditions per place. [2023-08-04 08:58:25,207 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 67 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 08:58:25,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 354 flow [2023-08-04 08:58:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-08-04 08:58:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256769374416433 [2023-08-04 08:58:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-08-04 08:58:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-08-04 08:58:25,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:25,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-08-04 08:58:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 08:58:25,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:25,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:25,215 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 188 flow. Second operand 3 states and 563 transitions. [2023-08-04 08:58:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 354 flow [2023-08-04 08:58:25,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:25,218 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 192 flow [2023-08-04 08:58:25,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-08-04 08:58:25,220 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 08:58:25,220 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 192 flow [2023-08-04 08:58:25,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 08:58:25,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:25,220 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 08:58:25,231 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 08:58:25,430 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 08:58:25,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:25,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -561575371, now seen corresponding path program 1 times [2023-08-04 08:58:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:25,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974750613] [2023-08-04 08:58:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:58:25,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974750613] [2023-08-04 08:58:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974750613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324908209] [2023-08-04 08:58:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:25,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:25,511 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 08:58:25,541 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 08:58:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:25,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:25,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:25,619 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 08:58:25,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:25,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324908209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:25,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:25,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:25,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666800237] [2023-08-04 08:58:25,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:25,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:25,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 08:58:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:26,845 INFO L124 PetriNetUnfolderBase]: 13091/19808 cut-off events. [2023-08-04 08:58:26,846 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2023-08-04 08:58:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40958 conditions, 19808 events. 13091/19808 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 128633 event pairs, 10134 based on Foata normal form. 0/18310 useless extension candidates. Maximal degree in co-relation 15915. Up to 15943 conditions per place. [2023-08-04 08:58:26,929 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 73 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 08:58:26,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 386 flow [2023-08-04 08:58:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-04 08:58:26,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303454715219421 [2023-08-04 08:58:26,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-04 08:58:26,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-04 08:58:26,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:26,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-04 08:58:26,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 08:58:26,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:26,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:26,936 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 192 flow. Second operand 3 states and 568 transitions. [2023-08-04 08:58:26,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 386 flow [2023-08-04 08:58:26,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:26,940 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 200 flow [2023-08-04 08:58:26,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2023-08-04 08:58:26,941 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 08:58:26,941 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 200 flow [2023-08-04 08:58:26,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 08:58:26,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:26,942 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] [2023-08-04 08:58:26,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:58:27,149 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 08:58:27,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:27,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1010831117, now seen corresponding path program 1 times [2023-08-04 08:58:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:27,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046234478] [2023-08-04 08:58:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:58:27,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046234478] [2023-08-04 08:58:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046234478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217026674] [2023-08-04 08:58:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:27,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:27,317 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 08:58:27,319 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 08:58:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:27,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:27,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:27,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:27,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217026674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:27,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:27,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397011106] [2023-08-04 08:58:27,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:27,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:27,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 08:58:27,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:27,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:27,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:28,288 INFO L124 PetriNetUnfolderBase]: 9802/15115 cut-off events. [2023-08-04 08:58:28,289 INFO L125 PetriNetUnfolderBase]: For 1451/1451 co-relation queries the response was YES. [2023-08-04 08:58:28,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32346 conditions, 15115 events. 9802/15115 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 95605 event pairs, 7895 based on Foata normal form. 0/14690 useless extension candidates. Maximal degree in co-relation 12396. Up to 11703 conditions per place. [2023-08-04 08:58:28,348 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 74 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 08:58:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 396 flow [2023-08-04 08:58:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-04 08:58:28,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303454715219421 [2023-08-04 08:58:28,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-04 08:58:28,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-04 08:58:28,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:28,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-04 08:58:28,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 08:58:28,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:28,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:28,355 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 200 flow. Second operand 3 states and 568 transitions. [2023-08-04 08:58:28,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 396 flow [2023-08-04 08:58:28,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:28,375 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 210 flow [2023-08-04 08:58:28,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-08-04 08:58:28,376 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-08-04 08:58:28,376 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 210 flow [2023-08-04 08:58:28,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 08:58:28,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:28,377 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] [2023-08-04 08:58:28,381 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 08:58:28,581 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 08:58:28,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:28,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1246013369, now seen corresponding path program 1 times [2023-08-04 08:58:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352971752] [2023-08-04 08:58:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:28,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352971752] [2023-08-04 08:58:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352971752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598129962] [2023-08-04 08:58:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:28,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:28,670 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 08:58:28,689 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 08:58:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:28,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:28,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:58:28,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:28,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598129962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:28,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:28,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013163444] [2023-08-04 08:58:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:28,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:28,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:28,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:28,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 08:58:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:29,706 INFO L124 PetriNetUnfolderBase]: 9321/14350 cut-off events. [2023-08-04 08:58:29,706 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2023-08-04 08:58:29,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31257 conditions, 14350 events. 9321/14350 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 89982 event pairs, 8788 based on Foata normal form. 0/14230 useless extension candidates. Maximal degree in co-relation 21689. Up to 12953 conditions per place. [2023-08-04 08:58:29,757 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 75 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 08:58:29,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 408 flow [2023-08-04 08:58:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-04 08:58:29,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303454715219421 [2023-08-04 08:58:29,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-04 08:58:29,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-04 08:58:29,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:29,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-04 08:58:29,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 08:58:29,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:29,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:29,763 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 210 flow. Second operand 3 states and 568 transitions. [2023-08-04 08:58:29,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 408 flow [2023-08-04 08:58:29,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:29,805 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 220 flow [2023-08-04 08:58:29,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-04 08:58:29,805 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 08:58:29,805 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 220 flow [2023-08-04 08:58:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 08:58:29,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:29,806 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:29,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:58:30,006 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 08:58:30,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:30,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash -933323835, now seen corresponding path program 1 times [2023-08-04 08:58:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48213113] [2023-08-04 08:58:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:58:30,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48213113] [2023-08-04 08:58:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48213113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505044204] [2023-08-04 08:58:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:30,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:30,071 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 08:58:30,075 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 08:58:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:30,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:30,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:58:30,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505044204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:30,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:30,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:58:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991808616] [2023-08-04 08:58:30,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:30,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:30,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 357 [2023-08-04 08:58:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 08:58:30,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:30,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 357 [2023-08-04 08:58:30,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:31,024 INFO L124 PetriNetUnfolderBase]: 9308/14323 cut-off events. [2023-08-04 08:58:31,024 INFO L125 PetriNetUnfolderBase]: For 1200/1200 co-relation queries the response was YES. [2023-08-04 08:58:31,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31256 conditions, 14323 events. 9308/14323 cut-off events. For 1200/1200 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 89643 event pairs, 9077 based on Foata normal form. 0/14236 useless extension candidates. Maximal degree in co-relation 29425. Up to 13466 conditions per place. [2023-08-04 08:58:31,110 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 67 selfloop transitions, 2 changer transitions 4/82 dead transitions. [2023-08-04 08:58:31,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 392 flow [2023-08-04 08:58:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-08-04 08:58:31,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256769374416433 [2023-08-04 08:58:31,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-08-04 08:58:31,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-08-04 08:58:31,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:31,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-08-04 08:58:31,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 08:58:31,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:31,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 08:58:31,117 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 220 flow. Second operand 3 states and 563 transitions. [2023-08-04 08:58:31,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 392 flow [2023-08-04 08:58:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:31,180 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 214 flow [2023-08-04 08:58:31,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2023-08-04 08:58:31,181 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 08:58:31,181 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 214 flow [2023-08-04 08:58:31,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 08:58:31,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:31,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:31,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:31,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:31,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2009810110, now seen corresponding path program 1 times [2023-08-04 08:58:31,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:31,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74930510] [2023-08-04 08:58:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:58:31,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:31,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74930510] [2023-08-04 08:58:31,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74930510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:31,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225477269] [2023-08-04 08:58:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:31,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:31,457 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 08:58:31,460 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 08:58:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:31,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:58:31,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:58:31,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:58:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:58:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225477269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:58:31,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:58:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:58:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456945990] [2023-08-04 08:58:31,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:58:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:58:31,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:58:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:31,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 357 [2023-08-04 08:58:31,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 08:58:31,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:31,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 357 [2023-08-04 08:58:31,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:31,657 INFO L124 PetriNetUnfolderBase]: 6/22 cut-off events. [2023-08-04 08:58:31,658 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:58:31,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 22 events. 6/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 1 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 08:58:31,658 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 08:58:31,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 13 transitions, 52 flow [2023-08-04 08:58:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:58:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:58:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-04 08:58:31,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2023-08-04 08:58:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-04 08:58:31,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-04 08:58:31,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:31,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-04 08:58:31,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 08:58:31,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states 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 08:58:31,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states 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 08:58:31,665 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 214 flow. Second operand 4 states and 664 transitions. [2023-08-04 08:58:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 13 transitions, 52 flow [2023-08-04 08:58:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 13 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:31,666 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 08:58:31,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 08:58:31,667 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -34 predicate places. [2023-08-04 08:58:31,667 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 08:58:31,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 08:58:31,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:58:31,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:31,875 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,SelfDestructingSolverStorable8 [2023-08-04 08:58:31,876 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:31,877 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:58:31,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 211 transitions, 490 flow [2023-08-04 08:58:31,996 INFO L124 PetriNetUnfolderBase]: 239/1457 cut-off events. [2023-08-04 08:58:31,996 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:58:32,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1457 events. 239/1457 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10115 event pairs, 0 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 802. Up to 33 conditions per place. [2023-08-04 08:58:32,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 211 transitions, 490 flow [2023-08-04 08:58:32,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 137 transitions, 294 flow [2023-08-04 08:58:32,002 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:32,002 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 137 transitions, 294 flow [2023-08-04 08:58:32,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 137 transitions, 294 flow [2023-08-04 08:58:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 137 transitions, 294 flow [2023-08-04 08:58:32,028 INFO L124 PetriNetUnfolderBase]: 15/417 cut-off events. [2023-08-04 08:58:32,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:32,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 417 events. 15/417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1769 event pairs, 0 based on Foata normal form. 0/388 useless extension candidates. Maximal degree in co-relation 302. Up to 16 conditions per place. [2023-08-04 08:58:32,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 2060 [2023-08-04 08:58:35,851 INFO L134 LiptonReduction]: Checked pairs total: 7647 [2023-08-04 08:58:35,852 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 08:58:35,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:58:35,854 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;@1b31eafb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:35,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 08:58:35,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:35,857 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:58:35,857 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:35,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:58:35,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 08:58:35,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1103125130, now seen corresponding path program 1 times [2023-08-04 08:58:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:35,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453651445] [2023-08-04 08:58:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:58:35,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:58:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:58:35,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:58:35,922 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:58:35,922 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 08:58:35,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 08:58:35,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 08:58:35,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 08:58:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:58:35,923 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:58:35,924 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:58:35,925 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:58:35,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:58:35,967 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 08:58:35,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 256 transitions, 656 flow [2023-08-04 08:58:37,953 INFO L124 PetriNetUnfolderBase]: 5322/20061 cut-off events. [2023-08-04 08:58:37,953 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:58:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24446 conditions, 20061 events. 5322/20061 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 215952 event pairs, 206 based on Foata normal form. 0/17260 useless extension candidates. Maximal degree in co-relation 12074. Up to 1024 conditions per place. [2023-08-04 08:58:38,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 256 transitions, 656 flow [2023-08-04 08:58:38,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 240 transitions, 608 flow [2023-08-04 08:58:38,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:38,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 240 transitions, 608 flow [2023-08-04 08:58:38,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 240 transitions, 608 flow [2023-08-04 08:58:38,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 240 transitions, 608 flow [2023-08-04 08:58:39,746 INFO L124 PetriNetUnfolderBase]: 5322/16949 cut-off events. [2023-08-04 08:58:39,747 INFO L125 PetriNetUnfolderBase]: For 4136/4136 co-relation queries the response was YES. [2023-08-04 08:58:39,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21254 conditions, 16949 events. 5322/16949 cut-off events. For 4136/4136 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 166479 event pairs, 206 based on Foata normal form. 0/14404 useless extension candidates. Maximal degree in co-relation 10460. Up to 1024 conditions per place. [2023-08-04 08:58:40,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 12720 [2023-08-04 08:58:43,655 INFO L134 LiptonReduction]: Checked pairs total: 92391 [2023-08-04 08:58:43,655 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-04 08:58:43,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:58:43,657 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;@1b31eafb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:43,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:58:43,662 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:43,663 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2023-08-04 08:58:43,663 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:58:43,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:43,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:43,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:43,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2118112548, now seen corresponding path program 1 times [2023-08-04 08:58:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:43,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448373793] [2023-08-04 08:58:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:43,688 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 08:58:43,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448373793] [2023-08-04 08:58:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448373793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:43,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:58:43,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:58:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866168295] [2023-08-04 08:58:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:43,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:58:43,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 402 [2023-08-04 08:58:43,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 08:58:43,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:43,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 402 [2023-08-04 08:58:43,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand