/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_popl20-more-buffer-series.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:23:40,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:23:40,411 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:23:40,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:23:40,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:23:40,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:23:40,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:23:40,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:23:40,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:23:40,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:23:40,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:23:40,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:23:40,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:23:40,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:23:40,443 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:23:40,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:23:40,443 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:23:40,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:23:40,445 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:23:40,445 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:23:40,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:23:40,446 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:23:40,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:23:40,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:23:40,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:23:40,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:23:40,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:23:40,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:23:40,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:23:40,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:23:40,448 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:23:40,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:23:40,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:23:40,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:23:40,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:23:40,688 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:23:40,688 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:23:40,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-series.wvr_bound2.c [2023-08-04 09:23:41,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:23:41,945 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:23:41,946 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-series.wvr_bound2.c [2023-08-04 09:23:41,951 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc95ec0e0/800e0914fa614cca88c117bd50e19f78/FLAG922aaac47 [2023-08-04 09:23:41,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc95ec0e0/800e0914fa614cca88c117bd50e19f78 [2023-08-04 09:23:41,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:23:41,963 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:23:41,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:23:41,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:23:41,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:23:41,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:23:41" (1/1) ... [2023-08-04 09:23:41,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f25b600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:41, skipping insertion in model container [2023-08-04 09:23:41,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:23:41" (1/1) ... [2023-08-04 09:23:42,004 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:23:42,132 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_popl20-more-buffer-series.wvr_bound2.c[4675,4688] [2023-08-04 09:23:42,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:23:42,142 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:23:42,170 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_popl20-more-buffer-series.wvr_bound2.c[4675,4688] [2023-08-04 09:23:42,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:23:42,178 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:23:42,179 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:23:42,183 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:23:42,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42 WrapperNode [2023-08-04 09:23:42,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:23:42,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:23:42,184 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:23:42,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:23:42,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,227 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 422 [2023-08-04 09:23:42,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:23:42,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:23:42,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:23:42,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:23:42,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,255 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,268 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:23:42,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:23:42,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:23:42,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:23:42,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (1/1) ... [2023-08-04 09:23:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:23:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:42,295 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 09:23:42,296 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 09:23:42,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:23:42,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:23:42,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:23:42,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:23:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:23:42,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:23:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:23:42,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:23:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:23:42,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:23:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:23:42,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:23:42,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:23:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:23:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:23:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:23:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:23:42,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:23:42,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:23:42,323 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 09:23:42,416 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:23:42,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:23:42,873 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:23:43,012 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:23:43,013 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-04 09:23:43,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:23:43 BoogieIcfgContainer [2023-08-04 09:23:43,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:23:43,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:23:43,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:23:43,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:23:43,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:23:41" (1/3) ... [2023-08-04 09:23:43,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12729d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:23:43, skipping insertion in model container [2023-08-04 09:23:43,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:23:42" (2/3) ... [2023-08-04 09:23:43,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12729d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:23:43, skipping insertion in model container [2023-08-04 09:23:43,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:23:43" (3/3) ... [2023-08-04 09:23:43,023 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-buffer-series.wvr_bound2.c [2023-08-04 09:23:43,029 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:23:43,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:23:43,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:23:43,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:23:43,106 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:23:43,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,488 INFO L124 PetriNetUnfolderBase]: 281/1590 cut-off events. [2023-08-04 09:23:43,488 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:23:43,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 1590 events. 281/1590 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9965 event pairs, 0 based on Foata normal form. 0/1327 useless extension candidates. Maximal degree in co-relation 919. Up to 33 conditions per place. [2023-08-04 09:23:43,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,512 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:23:43,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:23:43,670 INFO L124 PetriNetUnfolderBase]: 281/1590 cut-off events. [2023-08-04 09:23:43,671 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:23:43,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 1590 events. 281/1590 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9965 event pairs, 0 based on Foata normal form. 0/1327 useless extension candidates. Maximal degree in co-relation 919. Up to 33 conditions per place. [2023-08-04 09:23:43,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:23:52,067 INFO L134 LiptonReduction]: Checked pairs total: 22041 [2023-08-04 09:23:52,067 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-04 09:23:52,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:23:52,090 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;@446448ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:23:52,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:23:52,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:23:52,099 INFO L124 PetriNetUnfolderBase]: 7/75 cut-off events. [2023-08-04 09:23:52,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:23:52,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:52,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:23:52,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:52,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1356312624, now seen corresponding path program 1 times [2023-08-04 09:23:52,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:52,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190576971] [2023-08-04 09:23:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:52,363 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 09:23:52,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:52,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190576971] [2023-08-04 09:23:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190576971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:23:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:23:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757622854] [2023-08-04 09:23:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:23:52,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:23:52,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:52,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:52,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:23:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:23:54,530 INFO L124 PetriNetUnfolderBase]: 18265/25421 cut-off events. [2023-08-04 09:23:54,530 INFO L125 PetriNetUnfolderBase]: For 1653/1653 co-relation queries the response was YES. [2023-08-04 09:23:54,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51309 conditions, 25421 events. 18265/25421 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 158281 event pairs, 9825 based on Foata normal form. 0/16013 useless extension candidates. Maximal degree in co-relation 43245. Up to 23972 conditions per place. [2023-08-04 09:23:54,679 INFO L140 encePairwiseOnDemand]: 599/603 looper letters, 62 selfloop transitions, 2 changer transitions 3/79 dead transitions. [2023-08-04 09:23:54,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 356 flow [2023-08-04 09:23:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:23:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:23:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 09:23:54,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798231066887783 [2023-08-04 09:23:54,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 09:23:54,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 09:23:54,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:23:54,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 09:23:54,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:54,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:54,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:54,706 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 220 flow. Second operand 3 states and 868 transitions. [2023-08-04 09:23:54,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 356 flow [2023-08-04 09:23:54,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:23:54,718 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 218 flow [2023-08-04 09:23:54,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2023-08-04 09:23:54,722 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 09:23:54,722 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 218 flow [2023-08-04 09:23:54,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:54,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:54,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:23:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:23:54,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:54,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash 560009002, now seen corresponding path program 1 times [2023-08-04 09:23:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:54,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580393523] [2023-08-04 09:23:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:54,830 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 09:23:54,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:54,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580393523] [2023-08-04 09:23:54,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580393523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:23:54,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920328341] [2023-08-04 09:23:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:54,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:23:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:54,846 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 09:23:54,876 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 09:23:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:54,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:23:54,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:23:54,960 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 09:23:54,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:23:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920328341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:54,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:23:54,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:23:54,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39591624] [2023-08-04 09:23:54,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:54,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:54,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:23:54,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:23:54,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:54,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:54,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:23:54,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:23:56,608 INFO L124 PetriNetUnfolderBase]: 17758/24679 cut-off events. [2023-08-04 09:23:56,608 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2023-08-04 09:23:56,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49798 conditions, 24679 events. 17758/24679 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 152574 event pairs, 11857 based on Foata normal form. 0/15577 useless extension candidates. Maximal degree in co-relation 41737. Up to 23202 conditions per place. [2023-08-04 09:23:56,721 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 65 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2023-08-04 09:23:56,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 368 flow [2023-08-04 09:23:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:23:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:23:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 870 transitions. [2023-08-04 09:23:56,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48092868988391374 [2023-08-04 09:23:56,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 870 transitions. [2023-08-04 09:23:56,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 870 transitions. [2023-08-04 09:23:56,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:23:56,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 870 transitions. [2023-08-04 09:23:56,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:56,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:56,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:56,729 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 218 flow. Second operand 3 states and 870 transitions. [2023-08-04 09:23:56,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 368 flow [2023-08-04 09:23:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:23:56,735 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 212 flow [2023-08-04 09:23:56,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 09:23:56,736 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2023-08-04 09:23:56,736 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 212 flow [2023-08-04 09:23:56,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:56,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:56,737 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 09:23:56,743 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 09:23:56,943 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 09:23:56,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:56,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1349020107, now seen corresponding path program 1 times [2023-08-04 09:23:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243150568] [2023-08-04 09:23:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:57,018 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 09:23:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243150568] [2023-08-04 09:23:57,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243150568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:23:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942814059] [2023-08-04 09:23:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:23:57,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:57,033 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 09:23:57,039 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 09:23:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:57,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:23:57,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:23:57,153 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 09:23:57,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:23:57,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942814059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:57,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:23:57,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:23:57,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393958153] [2023-08-04 09:23:57,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:57,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:57,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:23:57,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:23:57,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:57,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:57,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:23:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:23:58,881 INFO L124 PetriNetUnfolderBase]: 17174/23855 cut-off events. [2023-08-04 09:23:58,881 INFO L125 PetriNetUnfolderBase]: For 822/822 co-relation queries the response was YES. [2023-08-04 09:23:58,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48186 conditions, 23855 events. 17174/23855 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 147868 event pairs, 8836 based on Foata normal form. 0/15085 useless extension candidates. Maximal degree in co-relation 21118. Up to 22227 conditions per place. [2023-08-04 09:23:58,976 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 68 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:23:58,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 370 flow [2023-08-04 09:23:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:23:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:23:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-04 09:23:58,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820342730790492 [2023-08-04 09:23:58,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-04 09:23:58,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-04 09:23:58,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:23:58,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-04 09:23:58,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:58,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:58,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:58,983 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 212 flow. Second operand 3 states and 872 transitions. [2023-08-04 09:23:58,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 370 flow [2023-08-04 09:23:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:23:58,986 INFO L231 Difference]: Finished difference. Result has 62 places, 73 transitions, 216 flow [2023-08-04 09:23:58,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=73} [2023-08-04 09:23:58,987 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-04 09:23:58,987 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 73 transitions, 216 flow [2023-08-04 09:23:58,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:58,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:58,987 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 09:23:58,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:23:59,192 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 09:23:59,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:59,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -457094713, now seen corresponding path program 1 times [2023-08-04 09:23:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285324533] [2023-08-04 09:23:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:59,239 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 09:23:59,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285324533] [2023-08-04 09:23:59,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285324533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:23:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561438198] [2023-08-04 09:23:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:23:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:59,253 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 09:23:59,255 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 09:23:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:59,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:23:59,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:23:59,361 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 09:23:59,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:23:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561438198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:59,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:23:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:23:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028698304] [2023-08-04 09:23:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:59,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:23:59,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:23:59,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 73 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:59,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:59,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:23:59,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:00,988 INFO L124 PetriNetUnfolderBase]: 17126/23807 cut-off events. [2023-08-04 09:24:00,989 INFO L125 PetriNetUnfolderBase]: For 876/876 co-relation queries the response was YES. [2023-08-04 09:24:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48235 conditions, 23807 events. 17126/23807 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 147931 event pairs, 8712 based on Foata normal form. 0/15133 useless extension candidates. Maximal degree in co-relation 21144. Up to 21459 conditions per place. [2023-08-04 09:24:01,104 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 70 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 09:24:01,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 382 flow [2023-08-04 09:24:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-04 09:24:01,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48313985627418465 [2023-08-04 09:24:01,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-04 09:24:01,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-04 09:24:01,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:01,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-04 09:24:01,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:01,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:01,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:01,112 INFO L175 Difference]: Start difference. First operand has 62 places, 73 transitions, 216 flow. Second operand 3 states and 874 transitions. [2023-08-04 09:24:01,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 382 flow [2023-08-04 09:24:01,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 378 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:24:01,115 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 220 flow [2023-08-04 09:24:01,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-04 09:24:01,116 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-08-04 09:24:01,116 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 220 flow [2023-08-04 09:24:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:01,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:01,117 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] [2023-08-04 09:24:01,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:24:01,321 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 09:24:01,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:01,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1136121349, now seen corresponding path program 1 times [2023-08-04 09:24:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:01,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235303040] [2023-08-04 09:24:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:01,396 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 09:24:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:01,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235303040] [2023-08-04 09:24:01,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235303040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:01,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945077055] [2023-08-04 09:24:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:01,400 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 09:24:01,403 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 09:24:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:01,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:24:01,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:01,532 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 09:24:01,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:24:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945077055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:01,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:24:01,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:24:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438390563] [2023-08-04 09:24:01,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:01,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:01,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:24:01,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:01,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:01,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:24:01,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:02,758 INFO L124 PetriNetUnfolderBase]: 11288/15953 cut-off events. [2023-08-04 09:24:02,758 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-08-04 09:24:02,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32944 conditions, 15953 events. 11288/15953 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 93512 event pairs, 6448 based on Foata normal form. 0/10299 useless extension candidates. Maximal degree in co-relation 13750. Up to 13059 conditions per place. [2023-08-04 09:24:02,809 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 75 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:24:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 416 flow [2023-08-04 09:24:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-08-04 09:24:02,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859038142620232 [2023-08-04 09:24:02,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-08-04 09:24:02,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-08-04 09:24:02,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:02,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-08-04 09:24:02,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:02,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:02,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:02,816 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 220 flow. Second operand 3 states and 879 transitions. [2023-08-04 09:24:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 416 flow [2023-08-04 09:24:02,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:24:02,819 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 228 flow [2023-08-04 09:24:02,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-08-04 09:24:02,820 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 09:24:02,820 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 228 flow [2023-08-04 09:24:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:02,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:02,820 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] [2023-08-04 09:24:02,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:24:03,025 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 09:24:03,025 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:03,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1962602591, now seen corresponding path program 1 times [2023-08-04 09:24:03,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:03,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286171987] [2023-08-04 09:24:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:03,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:03,085 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 09:24:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:03,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286171987] [2023-08-04 09:24:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286171987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:03,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941510932] [2023-08-04 09:24:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:03,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:03,087 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 09:24:03,089 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 09:24:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:03,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:24:03,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:03,195 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 09:24:03,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:24:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941510932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:24:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:24:03,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058437222] [2023-08-04 09:24:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:03,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:24:03,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:03,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:03,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:24:03,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:04,029 INFO L124 PetriNetUnfolderBase]: 8546/12285 cut-off events. [2023-08-04 09:24:04,029 INFO L125 PetriNetUnfolderBase]: For 796/796 co-relation queries the response was YES. [2023-08-04 09:24:04,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26126 conditions, 12285 events. 8546/12285 cut-off events. For 796/796 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 70435 event pairs, 4892 based on Foata normal form. 0/8433 useless extension candidates. Maximal degree in co-relation 10884. Up to 9414 conditions per place. [2023-08-04 09:24:04,071 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 09:24:04,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 426 flow [2023-08-04 09:24:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-08-04 09:24:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859038142620232 [2023-08-04 09:24:04,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-08-04 09:24:04,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-08-04 09:24:04,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:04,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-08-04 09:24:04,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:04,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:04,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:04,078 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 228 flow. Second operand 3 states and 879 transitions. [2023-08-04 09:24:04,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 426 flow [2023-08-04 09:24:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:24:04,086 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 238 flow [2023-08-04 09:24:04,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-08-04 09:24:04,086 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-04 09:24:04,086 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 238 flow [2023-08-04 09:24:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:04,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:04,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:24:04,091 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 09:24:04,291 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 09:24:04,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:04,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -851666779, now seen corresponding path program 1 times [2023-08-04 09:24:04,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:04,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895702146] [2023-08-04 09:24:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:04,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:04,345 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 09:24:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:04,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895702146] [2023-08-04 09:24:04,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895702146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929492827] [2023-08-04 09:24:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:04,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:04,351 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 09:24:04,354 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 09:24:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:04,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:24:04,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:04,452 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 09:24:04,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:24:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929492827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:04,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:24:04,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:24:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662126814] [2023-08-04 09:24:04,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:04,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:04,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:04,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:24:04,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:04,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:04,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:24:04,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:05,389 INFO L124 PetriNetUnfolderBase]: 8075/11599 cut-off events. [2023-08-04 09:24:05,389 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2023-08-04 09:24:05,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25097 conditions, 11599 events. 8075/11599 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 65680 event pairs, 5425 based on Foata normal form. 0/8161 useless extension candidates. Maximal degree in co-relation 17017. Up to 10347 conditions per place. [2023-08-04 09:24:05,441 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 09:24:05,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 438 flow [2023-08-04 09:24:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-08-04 09:24:05,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859038142620232 [2023-08-04 09:24:05,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-08-04 09:24:05,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-08-04 09:24:05,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:05,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-08-04 09:24:05,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:05,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:05,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:05,448 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 238 flow. Second operand 3 states and 879 transitions. [2023-08-04 09:24:05,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 438 flow [2023-08-04 09:24:05,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:24:05,484 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 248 flow [2023-08-04 09:24:05,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2023-08-04 09:24:05,485 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 6 predicate places. [2023-08-04 09:24:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 248 flow [2023-08-04 09:24:05,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:05,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:05,485 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] [2023-08-04 09:24:05,490 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 09:24:05,690 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 09:24:05,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:05,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1601082064, now seen corresponding path program 1 times [2023-08-04 09:24:05,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:05,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867021038] [2023-08-04 09:24:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:05,751 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 09:24:05,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:05,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867021038] [2023-08-04 09:24:05,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867021038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:05,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126697123] [2023-08-04 09:24:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:05,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:05,753 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 09:24:05,755 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 09:24:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:05,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:24:05,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:05,885 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 09:24:05,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:24:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126697123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:05,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:24:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:24:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915234553] [2023-08-04 09:24:05,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:05,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 603 [2023-08-04 09:24:05,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:05,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:05,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 603 [2023-08-04 09:24:05,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:06,947 INFO L124 PetriNetUnfolderBase]: 8060/11572 cut-off events. [2023-08-04 09:24:06,947 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-04 09:24:06,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 11572 events. 8060/11572 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 65496 event pairs, 5634 based on Foata normal form. 0/8169 useless extension candidates. Maximal degree in co-relation 23423. Up to 10810 conditions per place. [2023-08-04 09:24:07,018 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 71 selfloop transitions, 2 changer transitions 2/87 dead transitions. [2023-08-04 09:24:07,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 420 flow [2023-08-04 09:24:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-08-04 09:24:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48313985627418465 [2023-08-04 09:24:07,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-08-04 09:24:07,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-08-04 09:24:07,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:07,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-08-04 09:24:07,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 603.0) internal successors, (2412), 4 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,024 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 248 flow. Second operand 3 states and 874 transitions. [2023-08-04 09:24:07,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 420 flow [2023-08-04 09:24:07,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:24:07,054 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 250 flow [2023-08-04 09:24:07,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-08-04 09:24:07,055 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2023-08-04 09:24:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 250 flow [2023-08-04 09:24:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:07,056 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] [2023-08-04 09:24:07,071 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 09:24:07,257 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 09:24:07,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:07,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1490191323, now seen corresponding path program 1 times [2023-08-04 09:24:07,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:07,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026951126] [2023-08-04 09:24:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:07,339 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 09:24:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026951126] [2023-08-04 09:24:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026951126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780858425] [2023-08-04 09:24:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:07,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:07,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:07,353 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 09:24:07,355 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 09:24:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:07,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:24:07,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:07,489 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 09:24:07,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:24:07,504 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 09:24:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780858425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:24:07,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:24:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:24:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946950120] [2023-08-04 09:24:07,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:24:07,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:24:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:24:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:07,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 603 [2023-08-04 09:24:07,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:07,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 603 [2023-08-04 09:24:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:07,545 INFO L124 PetriNetUnfolderBase]: 13/30 cut-off events. [2023-08-04 09:24:07,545 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:24:07,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 30 events. 13/30 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 38 event pairs, 3 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 63. Up to 17 conditions per place. [2023-08-04 09:24:07,546 INFO L140 encePairwiseOnDemand]: 600/603 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 09:24:07,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 18 transitions, 74 flow [2023-08-04 09:24:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:24:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:24:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1082 transitions. [2023-08-04 09:24:07,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44859038142620233 [2023-08-04 09:24:07,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1082 transitions. [2023-08-04 09:24:07,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1082 transitions. [2023-08-04 09:24:07,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:07,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1082 transitions. [2023-08-04 09:24:07,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 270.5) internal successors, (1082), 4 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 603.0) internal successors, (3015), 5 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 603.0) internal successors, (3015), 5 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,553 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 250 flow. Second operand 4 states and 1082 transitions. [2023-08-04 09:24:07,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 18 transitions, 74 flow [2023-08-04 09:24:07,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:24:07,554 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 09:24:07,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=603, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 09:24:07,554 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -36 predicate places. [2023-08-04 09:24:07,554 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 09:24:07,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:07,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:24:07,567 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 09:24:07,762 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 09:24:07,763 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:24:07,764 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:24:07,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:07,894 INFO L124 PetriNetUnfolderBase]: 281/1590 cut-off events. [2023-08-04 09:24:07,895 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:24:07,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 1590 events. 281/1590 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9965 event pairs, 0 based on Foata normal form. 0/1327 useless extension candidates. Maximal degree in co-relation 919. Up to 33 conditions per place. [2023-08-04 09:24:07,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:07,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:07,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:24:07,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:07,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:07,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 321 transitions, 710 flow [2023-08-04 09:24:08,018 INFO L124 PetriNetUnfolderBase]: 281/1590 cut-off events. [2023-08-04 09:24:08,018 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:24:08,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 1590 events. 281/1590 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9965 event pairs, 0 based on Foata normal form. 0/1327 useless extension candidates. Maximal degree in co-relation 919. Up to 33 conditions per place. [2023-08-04 09:24:08,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:24:15,780 INFO L134 LiptonReduction]: Checked pairs total: 23928 [2023-08-04 09:24:15,781 INFO L136 LiptonReduction]: Total number of compositions: 292 [2023-08-04 09:24:15,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:24:15,782 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;@446448ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:24:15,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:24:15,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:24:15,786 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-08-04 09:24:15,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:24:15,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:15,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:24:15,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:24:15,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2124702731, now seen corresponding path program 1 times [2023-08-04 09:24:15,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:15,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934938145] [2023-08-04 09:24:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:15,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:24:15,814 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:24:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:24:15,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:24:15,842 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:24:15,842 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:24:15,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:24:15,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:24:15,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:24:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:24:15,842 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:24:15,843 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:24:15,843 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:24:15,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:24:15,880 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:24:15,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:18,013 INFO L124 PetriNetUnfolderBase]: 5494/20328 cut-off events. [2023-08-04 09:24:18,013 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:24:18,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24713 conditions, 20328 events. 5494/20328 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 213799 event pairs, 162 based on Foata normal form. 0/17355 useless extension candidates. Maximal degree in co-relation 12288. Up to 1024 conditions per place. [2023-08-04 09:24:18,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:18,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:18,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:24:18,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:18,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 375 transitions, 894 flow [2023-08-04 09:24:20,054 INFO L124 PetriNetUnfolderBase]: 5494/20328 cut-off events. [2023-08-04 09:24:20,054 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:24:20,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24713 conditions, 20328 events. 5494/20328 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 213799 event pairs, 162 based on Foata normal form. 0/17355 useless extension candidates. Maximal degree in co-relation 12288. Up to 1024 conditions per place. [2023-08-04 09:24:20,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 20348 [2023-08-04 09:24:27,888 INFO L134 LiptonReduction]: Checked pairs total: 89064 [2023-08-04 09:24:27,888 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-04 09:24:27,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:24:27,889 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;@446448ca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:24:27,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:24:27,893 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:24:27,893 INFO L124 PetriNetUnfolderBase]: 7/70 cut-off events. [2023-08-04 09:24:27,893 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:24:27,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:24:27,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:27,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash -829138001, now seen corresponding path program 1 times [2023-08-04 09:24:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:27,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425815738] [2023-08-04 09:24:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:27,919 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 09:24:27,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425815738] [2023-08-04 09:24:27,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425815738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:27,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:24:27,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:24:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061291982] [2023-08-04 09:24:27,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:24:27,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 677 [2023-08-04 09:24:27,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:24:27,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:27,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 677 [2023-08-04 09:24:27,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand