/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-min-max-inc.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:16:36,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:16:37,058 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:16:37,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:16:37,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:16:37,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:16:37,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:16:37,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:16:37,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:16:37,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:16:37,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:16:37,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:16:37,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:16:37,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:16:37,101 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:16:37,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:16:37,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:16:37,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:16:37,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:16:37,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:16:37,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:16:37,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:16:37,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:16:37,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:16:37,112 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:16:37,112 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:16:37,112 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:16:37,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:16:37,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:16:37,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:16:37,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:16:37,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:16:37,115 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:16:37,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:16:37,116 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:16:37,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:16:37,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:16:37,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:16:37,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:16:37,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:16:37,351 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:16:37,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc.wvr_bound2.c [2023-08-04 09:16:38,481 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:16:38,634 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:16:38,635 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc.wvr_bound2.c [2023-08-04 09:16:38,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8199e9cbe/47585c26322f420a9143fdf65dac7442/FLAGfe3eaba1c [2023-08-04 09:16:38,655 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8199e9cbe/47585c26322f420a9143fdf65dac7442 [2023-08-04 09:16:38,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:16:38,659 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:16:38,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:16:38,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:16:38,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:16:38,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30dc0315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38, skipping insertion in model container [2023-08-04 09:16:38,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,697 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:16:38,838 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-min-max-inc.wvr_bound2.c[3342,3355] [2023-08-04 09:16:38,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:16:38,851 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:16:38,875 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-min-max-inc.wvr_bound2.c[3342,3355] [2023-08-04 09:16:38,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:16:38,886 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:16:38,886 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:16:38,892 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:16:38,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38 WrapperNode [2023-08-04 09:16:38,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:16:38,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:16:38,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:16:38,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:16:38,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,932 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 203 [2023-08-04 09:16:38,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:16:38,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:16:38,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:16:38,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:16:38,941 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,966 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:16:38,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:16:38,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:16:38,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:16:38,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (1/1) ... [2023-08-04 09:16:38,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:16:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:38,998 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 09:16:39,028 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 09:16:39,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:16:39,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:16:39,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:16:39,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:16:39,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:16:39,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:16:39,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:16:39,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:16:39,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:16:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:16:39,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:16:39,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:16:39,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:16:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:16:39,054 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 09:16:39,183 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:16:39,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:16:39,550 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:16:39,615 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:16:39,615 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:16:39,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:16:39 BoogieIcfgContainer [2023-08-04 09:16:39,617 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:16:39,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:16:39,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:16:39,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:16:39,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:16:38" (1/3) ... [2023-08-04 09:16:39,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525e1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:16:39, skipping insertion in model container [2023-08-04 09:16:39,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:16:38" (2/3) ... [2023-08-04 09:16:39,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525e1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:16:39, skipping insertion in model container [2023-08-04 09:16:39,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:16:39" (3/3) ... [2023-08-04 09:16:39,625 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-min-max-inc.wvr_bound2.c [2023-08-04 09:16:39,632 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:16:39,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:16:39,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:16:39,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:16:39,737 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:16:39,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,067 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:16:40,068 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:16:40,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 1473 events. 257/1473 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9808 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 812. Up to 33 conditions per place. [2023-08-04 09:16:40,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,105 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:16:40,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:16:40,275 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:16:40,275 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:16:40,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 1473 events. 257/1473 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9808 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 812. Up to 33 conditions per place. [2023-08-04 09:16:40,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 8852 [2023-08-04 09:16:46,325 INFO L134 LiptonReduction]: Checked pairs total: 22347 [2023-08-04 09:16:46,326 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 09:16:46,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:16:46,346 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;@542e44b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:16:46,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:16:46,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:16:46,355 INFO L124 PetriNetUnfolderBase]: 4/66 cut-off events. [2023-08-04 09:16:46,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:16:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:46,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:46,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash -351212755, now seen corresponding path program 1 times [2023-08-04 09:16:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:46,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862206272] [2023-08-04 09:16:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:46,651 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 09:16:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862206272] [2023-08-04 09:16:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862206272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:46,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:16:46,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:16:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090365155] [2023-08-04 09:16:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:46,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:16:46,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:46,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:46,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:46,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:48,274 INFO L124 PetriNetUnfolderBase]: 13694/19057 cut-off events. [2023-08-04 09:16:48,274 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2023-08-04 09:16:48,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38682 conditions, 19057 events. 13694/19057 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 105528 event pairs, 5934 based on Foata normal form. 0/13593 useless extension candidates. Maximal degree in co-relation 32364. Up to 18123 conditions per place. [2023-08-04 09:16:48,385 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 60 selfloop transitions, 2 changer transitions 5/72 dead transitions. [2023-08-04 09:16:48,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 338 flow [2023-08-04 09:16:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-08-04 09:16:48,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920255183413078 [2023-08-04 09:16:48,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-08-04 09:16:48,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-08-04 09:16:48,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:48,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-08-04 09:16:48,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:48,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:48,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:48,414 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 204 flow. Second operand 3 states and 617 transitions. [2023-08-04 09:16:48,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 338 flow [2023-08-04 09:16:48,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:16:48,425 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 194 flow [2023-08-04 09:16:48,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-08-04 09:16:48,429 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:16:48,429 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 194 flow [2023-08-04 09:16:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:48,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:48,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:16:48,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:48,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1013570547, now seen corresponding path program 1 times [2023-08-04 09:16:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790449756] [2023-08-04 09:16:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:48,514 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 09:16:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790449756] [2023-08-04 09:16:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790449756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532482650] [2023-08-04 09:16:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:48,521 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 09:16:48,551 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 09:16:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:48,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:48,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:48,662 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 09:16:48,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532482650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:48,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608269446] [2023-08-04 09:16:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:48,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:48,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:48,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:48,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:50,177 INFO L124 PetriNetUnfolderBase]: 13254/18345 cut-off events. [2023-08-04 09:16:50,179 INFO L125 PetriNetUnfolderBase]: For 1523/1523 co-relation queries the response was YES. [2023-08-04 09:16:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37229 conditions, 18345 events. 13254/18345 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 99730 event pairs, 5832 based on Foata normal form. 0/13094 useless extension candidates. Maximal degree in co-relation 37184. Up to 17462 conditions per place. [2023-08-04 09:16:50,309 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 64 selfloop transitions, 2 changer transitions 1/72 dead transitions. [2023-08-04 09:16:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 346 flow [2023-08-04 09:16:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-04 09:16:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944178628389155 [2023-08-04 09:16:50,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-04 09:16:50,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-04 09:16:50,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:50,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-04 09:16:50,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:50,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:50,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:50,323 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 194 flow. Second operand 3 states and 620 transitions. [2023-08-04 09:16:50,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 346 flow [2023-08-04 09:16:50,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 09:16:50,333 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 178 flow [2023-08-04 09:16:50,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=63} [2023-08-04 09:16:50,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-08-04 09:16:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 178 flow [2023-08-04 09:16:50,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:50,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:50,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:50,345 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 09:16:50,540 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 09:16:50,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:50,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045523, now seen corresponding path program 1 times [2023-08-04 09:16:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:50,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062751516] [2023-08-04 09:16:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:50,690 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 09:16:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062751516] [2023-08-04 09:16:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062751516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274846313] [2023-08-04 09:16:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:50,697 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 09:16:50,726 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 09:16:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:50,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:50,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:50,808 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 09:16:50,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274846313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:50,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928894145] [2023-08-04 09:16:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:50,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:50,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:50,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:50,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:50,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:50,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:52,099 INFO L124 PetriNetUnfolderBase]: 12918/17881 cut-off events. [2023-08-04 09:16:52,100 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:16:52,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 17881 events. 12918/17881 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 97190 event pairs, 7130 based on Foata normal form. 0/12790 useless extension candidates. Maximal degree in co-relation 28699. Up to 16842 conditions per place. [2023-08-04 09:16:52,208 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 66 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:16:52,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 338 flow [2023-08-04 09:16:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:16:52,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960127591706539 [2023-08-04 09:16:52,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:16:52,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:16:52,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:52,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:16:52,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:52,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:52,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:52,216 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 178 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:16:52,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 338 flow [2023-08-04 09:16:52,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:16:52,218 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 182 flow [2023-08-04 09:16:52,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=53, PETRI_TRANSITIONS=63} [2023-08-04 09:16:52,219 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-04 09:16:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 182 flow [2023-08-04 09:16:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:52,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:16:52,425 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 09:16:52,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:52,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1727289705, now seen corresponding path program 1 times [2023-08-04 09:16:52,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:52,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173299285] [2023-08-04 09:16:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:52,530 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 09:16:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173299285] [2023-08-04 09:16:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173299285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57551697] [2023-08-04 09:16:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:52,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:52,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:52,533 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 09:16:52,558 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 09:16:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:52,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:52,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:52,634 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 09:16:52,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:52,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57551697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962210973] [2023-08-04 09:16:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:52,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:52,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:52,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:52,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:52,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:52,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:53,953 INFO L124 PetriNetUnfolderBase]: 12870/17833 cut-off events. [2023-08-04 09:16:53,954 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-08-04 09:16:53,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36261 conditions, 17833 events. 12870/17833 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 94897 event pairs, 6665 based on Foata normal form. 0/12822 useless extension candidates. Maximal degree in co-relation 28711. Up to 16170 conditions per place. [2023-08-04 09:16:54,046 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 67 selfloop transitions, 2 changer transitions 1/75 dead transitions. [2023-08-04 09:16:54,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 346 flow [2023-08-04 09:16:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 09:16:54,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49681020733652315 [2023-08-04 09:16:54,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 09:16:54,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 09:16:54,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:54,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 09:16:54,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:54,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:54,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:54,054 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 182 flow. Second operand 3 states and 623 transitions. [2023-08-04 09:16:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 346 flow [2023-08-04 09:16:54,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:16:54,058 INFO L231 Difference]: Finished difference. Result has 54 places, 63 transitions, 186 flow [2023-08-04 09:16:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=63} [2023-08-04 09:16:54,060 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-04 09:16:54,060 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 63 transitions, 186 flow [2023-08-04 09:16:54,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:54,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:54,061 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] [2023-08-04 09:16:54,069 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 09:16:54,269 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 09:16:54,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:54,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -588405347, now seen corresponding path program 1 times [2023-08-04 09:16:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294600150] [2023-08-04 09:16:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:54,360 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 09:16:54,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:54,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294600150] [2023-08-04 09:16:54,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294600150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:54,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150721522] [2023-08-04 09:16:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:54,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:54,366 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 09:16:54,367 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 09:16:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:54,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:54,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:54,473 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 09:16:54,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:54,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150721522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:54,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:54,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750517115] [2023-08-04 09:16:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:54,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:54,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:54,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:54,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:54,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:55,308 INFO L124 PetriNetUnfolderBase]: 8782/12305 cut-off events. [2023-08-04 09:16:55,308 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-08-04 09:16:55,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25494 conditions, 12305 events. 8782/12305 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 62237 event pairs, 4865 based on Foata normal form. 0/8906 useless extension candidates. Maximal degree in co-relation 20425. Up to 10426 conditions per place. [2023-08-04 09:16:55,391 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 73 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:16:55,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 378 flow [2023-08-04 09:16:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:16:55,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:16:55,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:16:55,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:16:55,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:55,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:16:55,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:55,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:55,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:55,398 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 186 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:16:55,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 378 flow [2023-08-04 09:16:55,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:16:55,403 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 194 flow [2023-08-04 09:16:55,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2023-08-04 09:16:55,405 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-04 09:16:55,406 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 194 flow [2023-08-04 09:16:55,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:55,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:55,406 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] [2023-08-04 09:16:55,415 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 09:16:55,612 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 09:16:55,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:55,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1448491314, now seen corresponding path program 1 times [2023-08-04 09:16:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:55,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511147203] [2023-08-04 09:16:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:55,691 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 09:16:55,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511147203] [2023-08-04 09:16:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511147203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647113586] [2023-08-04 09:16:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:55,693 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 09:16:55,719 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 09:16:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:55,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:55,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:55,818 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 09:16:55,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:55,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647113586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:55,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:55,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488182549] [2023-08-04 09:16:55,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:55,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:55,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:55,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:55,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:55,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:55,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:55,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:56,527 INFO L124 PetriNetUnfolderBase]: 6660/9475 cut-off events. [2023-08-04 09:16:56,527 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-08-04 09:16:56,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20228 conditions, 9475 events. 6660/9475 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 46406 event pairs, 3638 based on Foata normal form. 0/7232 useless extension candidates. Maximal degree in co-relation 16226. Up to 7403 conditions per place. [2023-08-04 09:16:56,566 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 74 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 09:16:56,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 388 flow [2023-08-04 09:16:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:16:56,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:16:56,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:16:56,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:16:56,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:56,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:16:56,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:56,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:56,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:56,573 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 194 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:16:56,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 388 flow [2023-08-04 09:16:56,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:16:56,580 INFO L231 Difference]: Finished difference. Result has 57 places, 65 transitions, 204 flow [2023-08-04 09:16:56,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=65} [2023-08-04 09:16:56,581 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-04 09:16:56,581 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 65 transitions, 204 flow [2023-08-04 09:16:56,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:56,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:56,581 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] [2023-08-04 09:16:56,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:16:56,786 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 09:16:56,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:56,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -521141072, now seen corresponding path program 1 times [2023-08-04 09:16:56,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:56,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240828547] [2023-08-04 09:16:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:56,847 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 09:16:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240828547] [2023-08-04 09:16:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240828547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680913654] [2023-08-04 09:16:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:56,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:56,849 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 09:16:56,864 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 09:16:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:56,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:56,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:56,958 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 09:16:56,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:56,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680913654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:56,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:56,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:16:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861925177] [2023-08-04 09:16:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:56,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:56,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:56,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 65 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:56,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:56,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:56,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:57,487 INFO L124 PetriNetUnfolderBase]: 6255/8888 cut-off events. [2023-08-04 09:16:57,487 INFO L125 PetriNetUnfolderBase]: For 740/740 co-relation queries the response was YES. [2023-08-04 09:16:57,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19350 conditions, 8888 events. 6255/8888 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 42773 event pairs, 4011 based on Foata normal form. 0/6955 useless extension candidates. Maximal degree in co-relation 15476. Up to 8083 conditions per place. [2023-08-04 09:16:57,520 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 75 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:16:57,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 400 flow [2023-08-04 09:16:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:16:57,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:16:57,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:16:57,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:16:57,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:57,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:16:57,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:57,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:57,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:57,527 INFO L175 Difference]: Start difference. First operand has 57 places, 65 transitions, 204 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:16:57,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 400 flow [2023-08-04 09:16:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:16:57,553 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 214 flow [2023-08-04 09:16:57,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-08-04 09:16:57,554 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:16:57,554 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 214 flow [2023-08-04 09:16:57,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:57,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:57,555 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] [2023-08-04 09:16:57,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:16:57,760 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 09:16:57,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:57,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash 17463248, now seen corresponding path program 1 times [2023-08-04 09:16:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:57,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377666486] [2023-08-04 09:16:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:57,824 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 09:16:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377666486] [2023-08-04 09:16:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377666486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377529115] [2023-08-04 09:16:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:57,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:57,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:57,826 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 09:16:57,829 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 09:16:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:57,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:16:57,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:57,941 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 09:16:57,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377529115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:57,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:57,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:16:57,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300821558] [2023-08-04 09:16:57,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:57,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:57,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:57,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:57,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:57,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:57,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:58,565 INFO L124 PetriNetUnfolderBase]: 6241/8863 cut-off events. [2023-08-04 09:16:58,565 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-08-04 09:16:58,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19344 conditions, 8863 events. 6241/8863 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 42625 event pairs, 4182 based on Foata normal form. 0/6961 useless extension candidates. Maximal degree in co-relation 17868. Up to 8480 conditions per place. [2023-08-04 09:16:58,593 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 67 selfloop transitions, 2 changer transitions 4/78 dead transitions. [2023-08-04 09:16:58,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 384 flow [2023-08-04 09:16:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 09:16:58,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49681020733652315 [2023-08-04 09:16:58,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 09:16:58,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 09:16:58,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:58,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 09:16:58,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:58,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:58,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:58,600 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 214 flow. Second operand 3 states and 623 transitions. [2023-08-04 09:16:58,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 384 flow [2023-08-04 09:16:58,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:16:58,621 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 208 flow [2023-08-04 09:16:58,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-08-04 09:16:58,622 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 09:16:58,622 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 208 flow [2023-08-04 09:16:58,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:58,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:58,623 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] [2023-08-04 09:16:58,627 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 09:16:58,823 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 09:16:58,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:58,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash -148650699, now seen corresponding path program 1 times [2023-08-04 09:16:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786637515] [2023-08-04 09:16:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:58,894 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 09:16:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786637515] [2023-08-04 09:16:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786637515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704136873] [2023-08-04 09:16:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:58,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:58,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:58,896 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 09:16:58,898 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 09:16:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:59,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:16:59,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:16:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:16:59,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:16:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704136873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:59,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:16:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:16:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468949352] [2023-08-04 09:16:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:16:59,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:16:59,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:59,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:59,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:16:59,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:59,565 INFO L124 PetriNetUnfolderBase]: 5540/7739 cut-off events. [2023-08-04 09:16:59,565 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2023-08-04 09:16:59,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16748 conditions, 7739 events. 5540/7739 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 35462 event pairs, 3740 based on Foata normal form. 1/6031 useless extension candidates. Maximal degree in co-relation 16581. Up to 7443 conditions per place. [2023-08-04 09:16:59,593 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 57 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:16:59,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 328 flow [2023-08-04 09:16:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:16:59,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880382775119617 [2023-08-04 09:16:59,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:16:59,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:16:59,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:59,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:16:59,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:59,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:59,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:59,599 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 208 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:16:59,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 328 flow [2023-08-04 09:16:59,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:16:59,613 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 216 flow [2023-08-04 09:16:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2023-08-04 09:16:59,614 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-08-04 09:16:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 216 flow [2023-08-04 09:16:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:16:59,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:59,615 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 09:16:59,623 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 09:16:59,823 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 09:16:59,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:59,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1860876680, now seen corresponding path program 1 times [2023-08-04 09:16:59,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:59,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492117576] [2023-08-04 09:16:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:59,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:16:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492117576] [2023-08-04 09:16:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492117576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:16:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737666670] [2023-08-04 09:16:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:59,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:16:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:16:59,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:16:59,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:17:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:00,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:17:00,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:17:00,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:17:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:17:00,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737666670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:17:00,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:17:00,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:17:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613045961] [2023-08-04 09:17:00,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:17:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:17:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:17:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:00,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-08-04 09:17:00,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:00,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:00,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-08-04 09:17:00,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:00,115 INFO L124 PetriNetUnfolderBase]: 10/26 cut-off events. [2023-08-04 09:17:00,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:17:00,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 26 events. 10/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 62. Up to 16 conditions per place. [2023-08-04 09:17:00,115 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:17:00,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 78 flow [2023-08-04 09:17:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:17:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:17:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-04 09:17:00,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-08-04 09:17:00,118 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-04 09:17:00,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-04 09:17:00,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:00,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-04 09:17:00,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:00,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:00,123 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:00,123 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 216 flow. Second operand 4 states and 748 transitions. [2023-08-04 09:17:00,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 78 flow [2023-08-04 09:17:00,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 72 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:17:00,124 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:17:00,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:17:00,124 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -32 predicate places. [2023-08-04 09:17:00,124 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:17:00,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:00,127 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:17:00,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:17:00,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 09:17:00,338 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:00,340 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:17:00,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,448 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:17:00,448 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:17:00,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 1473 events. 257/1473 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9808 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 812. Up to 33 conditions per place. [2023-08-04 09:17:00,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:00,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:17:00,528 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:17:00,528 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:17:00,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 1473 events. 257/1473 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9808 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 812. Up to 33 conditions per place. [2023-08-04 09:17:00,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 8852 [2023-08-04 09:17:05,720 INFO L134 LiptonReduction]: Checked pairs total: 23853 [2023-08-04 09:17:05,720 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-04 09:17:05,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:17:05,722 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;@542e44b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:05,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:17:05,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:05,725 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:17:05,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:17:05,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:05,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:17:05,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:17:05,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1925339317, now seen corresponding path program 1 times [2023-08-04 09:17:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:05,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044733256] [2023-08-04 09:17:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:05,794 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 09:17:05,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044733256] [2023-08-04 09:17:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044733256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:05,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:17:05,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:17:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442730044] [2023-08-04 09:17:05,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:05,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:05,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:17:05,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 426 [2023-08-04 09:17:05,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:05,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:05,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 426 [2023-08-04 09:17:05,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:06,937 INFO L124 PetriNetUnfolderBase]: 14185/19823 cut-off events. [2023-08-04 09:17:06,937 INFO L125 PetriNetUnfolderBase]: For 1545/1545 co-relation queries the response was YES. [2023-08-04 09:17:06,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40266 conditions, 19823 events. 14185/19823 cut-off events. For 1545/1545 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 111545 event pairs, 8945 based on Foata normal form. 0/14114 useless extension candidates. Maximal degree in co-relation 32421. Up to 18850 conditions per place. [2023-08-04 09:17:06,984 INFO L140 encePairwiseOnDemand]: 422/426 looper letters, 28 selfloop transitions, 2 changer transitions 33/68 dead transitions. [2023-08-04 09:17:06,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 322 flow [2023-08-04 09:17:06,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-04 09:17:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47965571205007823 [2023-08-04 09:17:06,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-04 09:17:06,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-04 09:17:06,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:06,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-04 09:17:06,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:06,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:06,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:06,991 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 204 flow. Second operand 3 states and 613 transitions. [2023-08-04 09:17:06,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 322 flow [2023-08-04 09:17:06,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:17:06,995 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 100 flow [2023-08-04 09:17:06,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2023-08-04 09:17:06,996 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:17:06,996 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 100 flow [2023-08-04 09:17:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:06,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:06,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:06,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 09:17:06,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:17:06,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:06,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1566661757, now seen corresponding path program 1 times [2023-08-04 09:17:06,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558406572] [2023-08-04 09:17:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:17:07,026 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:17:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:17:07,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:17:07,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:17:07,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:17:07,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:17:07,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:17:07,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:17:07,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 09:17:07,066 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:17:07,067 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:17:07,068 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:17:07,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:17:07,114 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:17:07,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:09,406 INFO L124 PetriNetUnfolderBase]: 5378/20024 cut-off events. [2023-08-04 09:17:09,406 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:17:09,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24409 conditions, 20024 events. 5378/20024 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 211835 event pairs, 81 based on Foata normal form. 0/17167 useless extension candidates. Maximal degree in co-relation 12037. Up to 1024 conditions per place. [2023-08-04 09:17:09,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:09,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:09,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:09,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:09,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:09,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:17:11,286 INFO L124 PetriNetUnfolderBase]: 5378/20024 cut-off events. [2023-08-04 09:17:11,287 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:17:11,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24409 conditions, 20024 events. 5378/20024 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 211835 event pairs, 81 based on Foata normal form. 0/17167 useless extension candidates. Maximal degree in co-relation 12037. Up to 1024 conditions per place. [2023-08-04 09:17:11,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 23164 [2023-08-04 09:17:17,355 INFO L134 LiptonReduction]: Checked pairs total: 78470 [2023-08-04 09:17:17,355 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-04 09:17:17,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:17:17,357 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;@542e44b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:17,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:17:17,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:17,360 INFO L124 PetriNetUnfolderBase]: 4/59 cut-off events. [2023-08-04 09:17:17,360 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:17:17,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:17,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:17,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:17,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 74195187, now seen corresponding path program 1 times [2023-08-04 09:17:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:17,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558826715] [2023-08-04 09:17:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:17,391 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 09:17:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558826715] [2023-08-04 09:17:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558826715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:17,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:17:17,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:17:17,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108671193] [2023-08-04 09:17:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:17,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:17:17,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 501 [2023-08-04 09:17:17,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:17:17,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:17,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 501 [2023-08-04 09:17:17,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand