/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-dec.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:14:09,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:14:09,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:14:09,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:14:09,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:14:09,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:14:09,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:14:09,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:14:09,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:14:09,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:14:09,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:14:09,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:14:09,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:14:09,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:14:09,974 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:14:09,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:14:09,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:14:09,975 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:14:09,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:14:09,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:14:09,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:14:09,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:14:09,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:14:09,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:14:09,977 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:14:09,978 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:14:09,978 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:14:09,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:14:09,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:14:09,979 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:14:09,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:14:09,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:14:09,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:14:09,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:14:09,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:14:09,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:14:09,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:14:09,982 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:14:09,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:14:09,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:14:09,982 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:14:09,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:14:10,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:14:10,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:14:10,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:14:10,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:14:10,250 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:14:10,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-dec.wvr_bound2.c [2023-08-04 09:14:11,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:14:11,581 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:14:11,582 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-dec.wvr_bound2.c [2023-08-04 09:14:11,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeb1cc4cc/2df0b1c073944553ba57cd821fbae5db/FLAG48fab7674 [2023-08-04 09:14:11,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeb1cc4cc/2df0b1c073944553ba57cd821fbae5db [2023-08-04 09:14:11,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:14:11,613 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:14:11,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:14:11,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:14:11,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:14:11,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0849b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11, skipping insertion in model container [2023-08-04 09:14:11,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,650 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:14:11,803 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-dec.wvr_bound2.c[3343,3356] [2023-08-04 09:14:11,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:14:11,816 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:14:11,841 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-dec.wvr_bound2.c[3343,3356] [2023-08-04 09:14:11,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:14:11,851 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:14:11,851 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:14:11,857 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:14:11,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11 WrapperNode [2023-08-04 09:14:11,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:14:11,859 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:14:11,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:14:11,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:14:11,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,909 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 203 [2023-08-04 09:14:11,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:14:11,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:14:11,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:14:11,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:14:11,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,923 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,953 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:14:11,954 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:14:11,954 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:14:11,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:14:11,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (1/1) ... [2023-08-04 09:14:11,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:14:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:11,996 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 09:14:12,007 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 09:14:12,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:14:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:14:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:14:12,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:14:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:14:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:14:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:14:12,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:14:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:14:12,034 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 09:14:12,140 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:14:12,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:14:12,419 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:14:12,519 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:14:12,519 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:14:12,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:14:12 BoogieIcfgContainer [2023-08-04 09:14:12,521 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:14:12,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:14:12,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:14:12,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:14:12,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:14:11" (1/3) ... [2023-08-04 09:14:12,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fc96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:14:12, skipping insertion in model container [2023-08-04 09:14:12,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:11" (2/3) ... [2023-08-04 09:14:12,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fc96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:14:12, skipping insertion in model container [2023-08-04 09:14:12,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:14:12" (3/3) ... [2023-08-04 09:14:12,533 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-min-max-dec.wvr_bound2.c [2023-08-04 09:14:12,539 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:14:12,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:14:12,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:14:12,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:14:12,630 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:14:12,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:12,986 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:14:12,986 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:14:13,003 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 09:14:13,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:13,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:13,022 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:13,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:13,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:13,217 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:14:13,217 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:14:13,226 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 09:14:13,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 8852 [2023-08-04 09:14:19,356 INFO L134 LiptonReduction]: Checked pairs total: 22347 [2023-08-04 09:14:19,357 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 09:14:19,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:14:19,382 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;@17af4b98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:19,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:14:19,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:19,389 INFO L124 PetriNetUnfolderBase]: 4/66 cut-off events. [2023-08-04 09:14:19,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:14:19,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:19,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:19,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:19,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:19,394 INFO L85 PathProgramCache]: Analyzing trace with hash -351212755, now seen corresponding path program 1 times [2023-08-04 09:14:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:19,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892517165] [2023-08-04 09:14:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:19,637 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 09:14:19,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:19,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892517165] [2023-08-04 09:14:19,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892517165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:19,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:14:19,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:14:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350605790] [2023-08-04 09:14:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:19,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:19,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:14:19,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:19,694 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 09:14:19,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:19,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:19,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:21,406 INFO L124 PetriNetUnfolderBase]: 13694/19057 cut-off events. [2023-08-04 09:14:21,407 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2023-08-04 09:14:21,431 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 09:14:21,512 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 60 selfloop transitions, 2 changer transitions 5/72 dead transitions. [2023-08-04 09:14:21,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 338 flow [2023-08-04 09:14:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-08-04 09:14:21,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920255183413078 [2023-08-04 09:14:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-08-04 09:14:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-08-04 09:14:21,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:21,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-08-04 09:14:21,533 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 09:14:21,538 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 09:14:21,539 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 09:14:21,541 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 204 flow. Second operand 3 states and 617 transitions. [2023-08-04 09:14:21,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 338 flow [2023-08-04 09:14:21,548 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 09:14:21,550 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 194 flow [2023-08-04 09:14:21,552 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 09:14:21,555 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:14:21,555 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 194 flow [2023-08-04 09:14:21,556 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 09:14:21,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:21,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:14:21,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:21,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1013570547, now seen corresponding path program 1 times [2023-08-04 09:14:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:21,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325284796] [2023-08-04 09:14:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:21,645 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 09:14:21,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325284796] [2023-08-04 09:14:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325284796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:21,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681744455] [2023-08-04 09:14:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:21,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:21,650 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 09:14:21,673 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 09:14:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:21,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:21,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:21,777 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 09:14:21,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:21,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681744455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:21,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:21,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899247306] [2023-08-04 09:14:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:21,797 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 09:14:21,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:21,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:23,327 INFO L124 PetriNetUnfolderBase]: 13254/18345 cut-off events. [2023-08-04 09:14:23,328 INFO L125 PetriNetUnfolderBase]: For 1523/1523 co-relation queries the response was YES. [2023-08-04 09:14:23,358 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 09:14:23,421 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 64 selfloop transitions, 2 changer transitions 1/72 dead transitions. [2023-08-04 09:14:23,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 346 flow [2023-08-04 09:14:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-04 09:14:23,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944178628389155 [2023-08-04 09:14:23,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-04 09:14:23,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-04 09:14:23,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:23,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-04 09:14:23,427 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 09:14:23,430 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 09:14:23,431 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 09:14:23,431 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 194 flow. Second operand 3 states and 620 transitions. [2023-08-04 09:14:23,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 346 flow [2023-08-04 09:14:23,439 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 09:14:23,440 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 178 flow [2023-08-04 09:14:23,440 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 09:14:23,441 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-08-04 09:14:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 178 flow [2023-08-04 09:14:23,442 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 09:14:23,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:23,456 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 09:14:23,656 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 09:14:23,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:23,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045523, now seen corresponding path program 1 times [2023-08-04 09:14:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025254122] [2023-08-04 09:14:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:23,732 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 09:14:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025254122] [2023-08-04 09:14:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025254122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244734355] [2023-08-04 09:14:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:23,735 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 09:14:23,738 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 09:14:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:23,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:23,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:23,835 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 09:14:23,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244734355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:23,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187803079] [2023-08-04 09:14:23,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:23,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:23,849 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 09:14:23,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:23,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:23,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:25,133 INFO L124 PetriNetUnfolderBase]: 12918/17881 cut-off events. [2023-08-04 09:14:25,133 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:14:25,154 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 09:14:25,211 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 66 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:14:25,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 338 flow [2023-08-04 09:14:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:14:25,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4960127591706539 [2023-08-04 09:14:25,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:14:25,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:14:25,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:25,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:14:25,215 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 09:14:25,217 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 09:14:25,218 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 09:14:25,218 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 178 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:14:25,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 338 flow [2023-08-04 09:14:25,220 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 09:14:25,221 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 182 flow [2023-08-04 09:14:25,221 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 09:14:25,222 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-08-04 09:14:25,222 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 182 flow [2023-08-04 09:14:25,222 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 09:14:25,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:25,222 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 09:14:25,233 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 09:14:25,428 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 09:14:25,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:25,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1727289705, now seen corresponding path program 1 times [2023-08-04 09:14:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:25,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001411436] [2023-08-04 09:14:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:25,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:25,526 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 09:14:25,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001411436] [2023-08-04 09:14:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001411436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849274622] [2023-08-04 09:14:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:25,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:25,528 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 09:14:25,530 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 09:14:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:25,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:25,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:25,623 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 09:14:25,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849274622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:25,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905495349] [2023-08-04 09:14:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:25,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:25,633 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 09:14:25,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:25,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:26,710 INFO L124 PetriNetUnfolderBase]: 12870/17833 cut-off events. [2023-08-04 09:14:26,710 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-08-04 09:14:26,741 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 09:14:26,797 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 67 selfloop transitions, 2 changer transitions 1/75 dead transitions. [2023-08-04 09:14:26,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 346 flow [2023-08-04 09:14:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 09:14:26,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49681020733652315 [2023-08-04 09:14:26,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 09:14:26,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 09:14:26,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:26,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 09:14:26,801 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 09:14:26,804 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 09:14:26,804 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 09:14:26,805 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 182 flow. Second operand 3 states and 623 transitions. [2023-08-04 09:14:26,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 346 flow [2023-08-04 09:14:26,806 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 09:14:26,807 INFO L231 Difference]: Finished difference. Result has 54 places, 63 transitions, 186 flow [2023-08-04 09:14:26,807 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 09:14:26,808 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-04 09:14:26,808 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 63 transitions, 186 flow [2023-08-04 09:14:26,809 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 09:14:26,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:26,809 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 09:14:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:27,016 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 09:14:27,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:27,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash -588405347, now seen corresponding path program 1 times [2023-08-04 09:14:27,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:27,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854980440] [2023-08-04 09:14:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:27,099 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 09:14:27,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854980440] [2023-08-04 09:14:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854980440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568563186] [2023-08-04 09:14:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:27,108 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 09:14:27,110 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 09:14:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:27,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:27,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:27,207 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 09:14:27,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568563186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645763777] [2023-08-04 09:14:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:27,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:27,221 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 09:14:27,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:27,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:27,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:27,944 INFO L124 PetriNetUnfolderBase]: 8782/12305 cut-off events. [2023-08-04 09:14:27,944 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-08-04 09:14:27,964 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 09:14:28,001 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 73 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:14:28,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 80 transitions, 378 flow [2023-08-04 09:14:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:14:28,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:14:28,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:14:28,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:14:28,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:28,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:14:28,005 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 09:14:28,008 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 09:14:28,008 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 09:14:28,008 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 186 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:14:28,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 80 transitions, 378 flow [2023-08-04 09:14:28,011 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 09:14:28,012 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 194 flow [2023-08-04 09:14:28,012 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 09:14:28,013 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-04 09:14:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 194 flow [2023-08-04 09:14:28,014 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 09:14:28,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:28,014 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 09:14:28,021 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 09:14:28,219 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 09:14:28,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:28,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1448491314, now seen corresponding path program 1 times [2023-08-04 09:14:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:28,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920015144] [2023-08-04 09:14:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:28,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:28,300 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 09:14:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920015144] [2023-08-04 09:14:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920015144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347441735] [2023-08-04 09:14:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:28,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:28,302 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 09:14:28,305 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 09:14:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:28,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:28,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:28,411 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 09:14:28,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347441735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:28,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:28,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:28,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955606043] [2023-08-04 09:14:28,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:28,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:28,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:28,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:28,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:28,422 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 09:14:28,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:28,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:28,984 INFO L124 PetriNetUnfolderBase]: 6660/9475 cut-off events. [2023-08-04 09:14:28,985 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-08-04 09:14:28,998 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 09:14:29,024 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 74 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 09:14:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 388 flow [2023-08-04 09:14:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:14:29,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:14:29,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:14:29,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:14:29,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:29,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:14:29,029 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 09:14:29,031 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 09:14:29,032 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 09:14:29,032 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 194 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:14:29,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 388 flow [2023-08-04 09:14:29,038 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 09:14:29,039 INFO L231 Difference]: Finished difference. Result has 57 places, 65 transitions, 204 flow [2023-08-04 09:14:29,039 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 09:14:29,040 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-04 09:14:29,040 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 65 transitions, 204 flow [2023-08-04 09:14:29,040 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 09:14:29,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:29,040 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 09:14:29,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:14:29,245 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 09:14:29,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:29,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -521141072, now seen corresponding path program 1 times [2023-08-04 09:14:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270810612] [2023-08-04 09:14:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:29,296 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 09:14:29,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:29,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270810612] [2023-08-04 09:14:29,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270810612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:29,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188076614] [2023-08-04 09:14:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:29,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:29,299 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 09:14:29,327 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 09:14:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:29,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:29,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:29,437 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 09:14:29,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:29,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188076614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:29,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:29,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:14:29,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879931840] [2023-08-04 09:14:29,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:29,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:29,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:29,450 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 09:14:29,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:29,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:29,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:30,072 INFO L124 PetriNetUnfolderBase]: 6255/8888 cut-off events. [2023-08-04 09:14:30,072 INFO L125 PetriNetUnfolderBase]: For 740/740 co-relation queries the response was YES. [2023-08-04 09:14:30,089 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 09:14:30,116 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 75 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:14:30,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 400 flow [2023-08-04 09:14:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 09:14:30,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007974481658692 [2023-08-04 09:14:30,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 09:14:30,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 09:14:30,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:30,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 09:14:30,121 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 09:14:30,123 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 09:14:30,123 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 09:14:30,123 INFO L175 Difference]: Start difference. First operand has 57 places, 65 transitions, 204 flow. Second operand 3 states and 628 transitions. [2023-08-04 09:14:30,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 400 flow [2023-08-04 09:14:30,155 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 09:14:30,156 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 214 flow [2023-08-04 09:14:30,156 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 09:14:30,157 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:14:30,157 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 214 flow [2023-08-04 09:14:30,157 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 09:14:30,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:30,158 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 09:14:30,167 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 09:14:30,363 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 09:14:30,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:30,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 17463248, now seen corresponding path program 1 times [2023-08-04 09:14:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210940933] [2023-08-04 09:14:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:30,434 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 09:14:30,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210940933] [2023-08-04 09:14:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210940933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110241667] [2023-08-04 09:14:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:30,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:30,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:30,436 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 09:14:30,438 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 09:14:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:30,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:14:30,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:30,562 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 09:14:30,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:30,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110241667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:30,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:30,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:14:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351512135] [2023-08-04 09:14:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:30,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:30,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:30,577 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 09:14:30,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:30,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:30,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:31,180 INFO L124 PetriNetUnfolderBase]: 6241/8863 cut-off events. [2023-08-04 09:14:31,181 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-08-04 09:14:31,200 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 09:14:31,218 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 67 selfloop transitions, 2 changer transitions 4/78 dead transitions. [2023-08-04 09:14:31,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 384 flow [2023-08-04 09:14:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-04 09:14:31,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49681020733652315 [2023-08-04 09:14:31,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-04 09:14:31,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-04 09:14:31,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:31,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-04 09:14:31,223 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 09:14:31,225 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 09:14:31,226 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 09:14:31,226 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 214 flow. Second operand 3 states and 623 transitions. [2023-08-04 09:14:31,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 384 flow [2023-08-04 09:14:31,252 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 09:14:31,253 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 208 flow [2023-08-04 09:14:31,254 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 09:14:31,254 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 09:14:31,254 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 208 flow [2023-08-04 09:14:31,255 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 09:14:31,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:31,255 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 09:14:31,262 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 09:14:31,457 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 09:14:31,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:31,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -148650699, now seen corresponding path program 1 times [2023-08-04 09:14:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875197199] [2023-08-04 09:14:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:31,532 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 09:14:31,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875197199] [2023-08-04 09:14:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875197199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617096886] [2023-08-04 09:14:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:31,535 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 09:14:31,537 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 09:14:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:31,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:14:31,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:31,678 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 09:14:31,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:14:31,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617096886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:31,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:14:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:14:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100994850] [2023-08-04 09:14:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:31,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:31,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-08-04 09:14:31,697 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 09:14:31,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:31,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-08-04 09:14:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:32,212 INFO L124 PetriNetUnfolderBase]: 5540/7739 cut-off events. [2023-08-04 09:14:32,213 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2023-08-04 09:14:32,286 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 09:14:32,302 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 57 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:14:32,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 328 flow [2023-08-04 09:14:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:14:32,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880382775119617 [2023-08-04 09:14:32,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:14:32,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:14:32,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:32,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:14:32,305 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 09:14:32,307 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 09:14:32,307 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 09:14:32,307 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 208 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:14:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 328 flow [2023-08-04 09:14:32,317 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 09:14:32,318 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 216 flow [2023-08-04 09:14:32,318 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 09:14:32,319 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-08-04 09:14:32,319 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 216 flow [2023-08-04 09:14:32,319 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 09:14:32,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:32,320 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 09:14:32,325 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 09:14:32,522 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 09:14:32,523 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:32,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1860876680, now seen corresponding path program 1 times [2023-08-04 09:14:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:32,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822124360] [2023-08-04 09:14:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:32,607 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 09:14:32,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822124360] [2023-08-04 09:14:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822124360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:14:32,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441751694] [2023-08-04 09:14:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:32,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:14:32,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:32,609 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 09:14:32,611 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 09:14:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:32,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:14:32,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:14:32,750 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 09:14:32,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:14:32,768 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 09:14:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441751694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:14:32,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:14:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:14:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93512155] [2023-08-04 09:14:32,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:14:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:14:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:14:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:14:32,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 418 [2023-08-04 09:14:32,784 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 09:14:32,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:32,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 418 [2023-08-04 09:14:32,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:32,818 INFO L124 PetriNetUnfolderBase]: 10/26 cut-off events. [2023-08-04 09:14:32,818 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:14:32,819 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 09:14:32,819 INFO L140 encePairwiseOnDemand]: 415/418 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:14:32,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 78 flow [2023-08-04 09:14:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:14:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:14:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-04 09:14:32,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-08-04 09:14:32,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-04 09:14:32,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-04 09:14:32,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:32,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-04 09:14:32,824 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 09:14:32,827 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 09:14:32,828 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 09:14:32,828 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 216 flow. Second operand 4 states and 748 transitions. [2023-08-04 09:14:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 78 flow [2023-08-04 09:14:32,828 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 09:14:32,829 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:14:32,829 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 09:14:32,829 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -32 predicate places. [2023-08-04 09:14:32,830 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:14:32,830 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 09:14:32,832 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:14:32,841 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 09:14:33,038 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 09:14:33,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:33,040 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:14:33,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,167 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:14:33,168 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:14:33,173 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 09:14:33,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:33,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 528 flow [2023-08-04 09:14:33,293 INFO L124 PetriNetUnfolderBase]: 257/1473 cut-off events. [2023-08-04 09:14:33,294 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:14:33,301 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 09:14:33,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 8852 [2023-08-04 09:14:38,544 INFO L134 LiptonReduction]: Checked pairs total: 23853 [2023-08-04 09:14:38,545 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-04 09:14:38,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:14:38,547 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;@17af4b98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:38,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:14:38,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:38,550 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:14:38,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:14:38,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:38,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:14:38,551 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 09:14:38,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1925339317, now seen corresponding path program 1 times [2023-08-04 09:14:38,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:38,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448331538] [2023-08-04 09:14:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:38,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:38,609 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 09:14:38,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:38,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448331538] [2023-08-04 09:14:38,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448331538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:38,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:14:38,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:14:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663301050] [2023-08-04 09:14:38,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:38,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:14:38,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 426 [2023-08-04 09:14:38,625 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 09:14:38,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:38,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 426 [2023-08-04 09:14:38,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:14:39,746 INFO L124 PetriNetUnfolderBase]: 14185/19823 cut-off events. [2023-08-04 09:14:39,747 INFO L125 PetriNetUnfolderBase]: For 1545/1545 co-relation queries the response was YES. [2023-08-04 09:14:39,785 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 09:14:39,811 INFO L140 encePairwiseOnDemand]: 422/426 looper letters, 28 selfloop transitions, 2 changer transitions 33/68 dead transitions. [2023-08-04 09:14:39,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 322 flow [2023-08-04 09:14:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:14:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:14:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-04 09:14:39,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47965571205007823 [2023-08-04 09:14:39,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-04 09:14:39,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-04 09:14:39,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:14:39,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-04 09:14:39,816 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 09:14:39,818 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 09:14:39,818 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 09:14:39,818 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 204 flow. Second operand 3 states and 613 transitions. [2023-08-04 09:14:39,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 322 flow [2023-08-04 09:14:39,823 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 09:14:39,824 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 100 flow [2023-08-04 09:14:39,824 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 09:14:39,824 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 09:14:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 100 flow [2023-08-04 09:14:39,825 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 09:14:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 09:14:39,825 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 09:14:39,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1566661757, now seen corresponding path program 1 times [2023-08-04 09:14:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190594129] [2023-08-04 09:14:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:14:39,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:14:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:14:39,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:14:39,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:14:39,877 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:14:39,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:14:39,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:14:39,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:14:39,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 09:14:39,878 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:14:39,879 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:14:39,879 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:14:39,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:14:39,916 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:14:39,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:42,092 INFO L124 PetriNetUnfolderBase]: 5378/20024 cut-off events. [2023-08-04 09:14:42,092 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:14:42,308 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 09:14:42,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:42,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:42,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:42,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:42,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:42,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 287 transitions, 718 flow [2023-08-04 09:14:44,233 INFO L124 PetriNetUnfolderBase]: 5378/20024 cut-off events. [2023-08-04 09:14:44,233 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:14:44,380 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 09:14:44,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 23164 [2023-08-04 09:14:50,311 INFO L134 LiptonReduction]: Checked pairs total: 78470 [2023-08-04 09:14:50,311 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-04 09:14:50,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:14:50,313 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;@17af4b98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:14:50,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:14:50,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:14:50,316 INFO L124 PetriNetUnfolderBase]: 4/59 cut-off events. [2023-08-04 09:14:50,316 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:14:50,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:14:50,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:14:50,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:14:50,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:14:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 74195187, now seen corresponding path program 1 times [2023-08-04 09:14:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:14:50,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615507445] [2023-08-04 09:14:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:14:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:14:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:14:50,342 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 09:14:50,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:14:50,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615507445] [2023-08-04 09:14:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615507445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:14:50,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:14:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:14:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767658443] [2023-08-04 09:14:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:14:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:14:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:14:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:14:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:14:50,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 501 [2023-08-04 09:14:50,352 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 09:14:50,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:14:50,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 501 [2023-08-04 09:14:50,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand