/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:26:37,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:26:37,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:26:37,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:26:37,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:26:37,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:26:37,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:26:37,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:26:37,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:26:37,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:26:37,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:26:37,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:26:37,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:26:37,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:26:37,903 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:26:37,903 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:26:37,904 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:26:37,904 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:26:37,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:26:37,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:26:37,904 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:26:37,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:26:37,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:26:37,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:26:37,906 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:26:37,907 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:26:37,907 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:26:37,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:26:37,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:26:37,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:26:37,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:26:37,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:26:37,909 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:26:37,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:26:37,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:26:37,910 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:26:37,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:26:38,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:26:38,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:26:38,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:26:38,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:26:38,179 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:26:38,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c [2023-08-04 09:26:39,400 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:26:39,590 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:26:39,590 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c [2023-08-04 09:26:39,597 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1e4789b/738c89ea0f4940db8ce996d46ddc0646/FLAG566b8de38 [2023-08-04 09:26:39,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1e4789b/738c89ea0f4940db8ce996d46ddc0646 [2023-08-04 09:26:39,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:26:39,622 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:26:39,625 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:26:39,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:26:39,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:26:39,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6231017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39, skipping insertion in model container [2023-08-04 09:26:39,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,658 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:26:39,839 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c[2796,2809] [2023-08-04 09:26:39,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:26:39,851 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:26:39,896 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array.wvr_bound2.c[2796,2809] [2023-08-04 09:26:39,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:26:39,907 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:26:39,907 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:26:39,914 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:26:39,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39 WrapperNode [2023-08-04 09:26:39,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:26:39,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:26:39,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:26:39,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:26:39,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,961 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 152 [2023-08-04 09:26:39,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:26:39,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:26:39,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:26:39,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:26:39,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,977 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,984 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,993 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:39,996 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:26:39,997 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:26:39,997 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:26:39,997 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:26:39,998 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (1/1) ... [2023-08-04 09:26:40,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:26:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:40,027 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 09:26:40,031 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 09:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:26:40,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:26:40,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:26:40,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:26:40,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:26:40,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:26:40,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:26:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:26:40,059 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 09:26:40,142 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:26:40,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:26:40,389 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:26:40,443 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:26:40,444 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:26:40,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:26:40 BoogieIcfgContainer [2023-08-04 09:26:40,446 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:26:40,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:26:40,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:26:40,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:26:40,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:26:39" (1/3) ... [2023-08-04 09:26:40,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683bb4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:26:40, skipping insertion in model container [2023-08-04 09:26:40,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:26:39" (2/3) ... [2023-08-04 09:26:40,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683bb4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:26:40, skipping insertion in model container [2023-08-04 09:26:40,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:26:40" (3/3) ... [2023-08-04 09:26:40,453 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-min-array.wvr_bound2.c [2023-08-04 09:26:40,469 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:26:40,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:26:40,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:26:40,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:26:40,581 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:26:40,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,784 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:26:40,784 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:26:40,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-04 09:26:40,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:26:40,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:40,921 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:26:40,921 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:26:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-04 09:26:40,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:26:45,506 INFO L134 LiptonReduction]: Checked pairs total: 9109 [2023-08-04 09:26:45,507 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-04 09:26:45,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:26:45,524 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;@1302bcd7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:26:45,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:26:45,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:26:45,529 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:26:45,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:26:45,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:45,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:45,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:45,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -724389028, now seen corresponding path program 1 times [2023-08-04 09:26:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928604049] [2023-08-04 09:26:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:45,763 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 09:26:45,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:45,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928604049] [2023-08-04 09:26:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928604049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:45,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:26:45,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:26:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138625329] [2023-08-04 09:26:45,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:45,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:45,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:26:45,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:45,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:45,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:45,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:45,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:46,130 INFO L124 PetriNetUnfolderBase]: 2189/3062 cut-off events. [2023-08-04 09:26:46,131 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-04 09:26:46,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6181 conditions, 3062 events. 2189/3062 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13844 event pairs, 825 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 4968. Up to 2908 conditions per place. [2023-08-04 09:26:46,148 INFO L140 encePairwiseOnDemand]: 358/362 looper letters, 39 selfloop transitions, 2 changer transitions 4/51 dead transitions. [2023-08-04 09:26:46,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 228 flow [2023-08-04 09:26:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 09:26:46,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47697974217311234 [2023-08-04 09:26:46,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 09:26:46,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 09:26:46,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:46,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 09:26:46,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,176 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 518 transitions. [2023-08-04 09:26:46,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 228 flow [2023-08-04 09:26:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:26:46,182 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 134 flow [2023-08-04 09:26:46,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 09:26:46,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 09:26:46,187 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 134 flow [2023-08-04 09:26:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:46,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:26:46,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:46,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1684195600, now seen corresponding path program 1 times [2023-08-04 09:26:46,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:46,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544898346] [2023-08-04 09:26:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:46,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:46,263 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 09:26:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544898346] [2023-08-04 09:26:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544898346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942823093] [2023-08-04 09:26:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:46,273 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 09:26:46,320 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 09:26:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:46,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:46,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:46,381 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 09:26:46,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942823093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:46,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:46,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357245773] [2023-08-04 09:26:46,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:46,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:46,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:46,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:46,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:46,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:46,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:46,690 INFO L124 PetriNetUnfolderBase]: 2097/2911 cut-off events. [2023-08-04 09:26:46,691 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-08-04 09:26:46,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2911 events. 2097/2911 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12970 event pairs, 804 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 4671. Up to 2757 conditions per place. [2023-08-04 09:26:46,708 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 41 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 09:26:46,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 232 flow [2023-08-04 09:26:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-04 09:26:46,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47790055248618785 [2023-08-04 09:26:46,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-04 09:26:46,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-04 09:26:46,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:46,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-04 09:26:46,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,716 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 134 flow. Second operand 3 states and 519 transitions. [2023-08-04 09:26:46,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 232 flow [2023-08-04 09:26:46,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:26:46,719 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 126 flow [2023-08-04 09:26:46,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2023-08-04 09:26:46,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-04 09:26:46,720 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 126 flow [2023-08-04 09:26:46,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:46,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:46,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:26:46,927 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 09:26:46,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:46,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -281950171, now seen corresponding path program 1 times [2023-08-04 09:26:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711090297] [2023-08-04 09:26:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:47,014 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 09:26:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711090297] [2023-08-04 09:26:47,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711090297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061811440] [2023-08-04 09:26:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:47,020 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 09:26:47,027 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 09:26:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:47,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:47,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:47,113 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 09:26:47,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061811440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:47,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:47,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175693893] [2023-08-04 09:26:47,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:47,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:47,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:47,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:47,348 INFO L124 PetriNetUnfolderBase]: 2088/2902 cut-off events. [2023-08-04 09:26:47,349 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:26:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 2902 events. 2088/2902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12861 event pairs, 789 based on Foata normal form. 0/1680 useless extension candidates. Maximal degree in co-relation 2270. Up to 2638 conditions per place. [2023-08-04 09:26:47,366 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 43 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-04 09:26:47,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 232 flow [2023-08-04 09:26:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:26:47,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47974217311233885 [2023-08-04 09:26:47,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:26:47,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:26:47,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:47,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:26:47,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,372 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 126 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:26:47,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 232 flow [2023-08-04 09:26:47,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:26:47,374 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 130 flow [2023-08-04 09:26:47,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-04 09:26:47,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-04 09:26:47,375 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 130 flow [2023-08-04 09:26:47,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:47,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:47,388 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 09:26:47,581 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 09:26:47,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:47,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1233944356, now seen corresponding path program 1 times [2023-08-04 09:26:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:47,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195606513] [2023-08-04 09:26:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:47,678 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 09:26:47,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195606513] [2023-08-04 09:26:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195606513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730628168] [2023-08-04 09:26:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:47,680 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 09:26:47,683 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 09:26:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:47,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:47,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:47,765 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 09:26:47,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730628168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:47,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544102846] [2023-08-04 09:26:47,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:47,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:47,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:47,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:47,975 INFO L124 PetriNetUnfolderBase]: 1350/1921 cut-off events. [2023-08-04 09:26:47,975 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:26:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 1921 events. 1350/1921 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7921 event pairs, 492 based on Foata normal form. 0/1140 useless extension candidates. Maximal degree in co-relation 1654. Up to 1483 conditions per place. [2023-08-04 09:26:47,985 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 48 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 09:26:47,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 258 flow [2023-08-04 09:26:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-04 09:26:47,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342541436464087 [2023-08-04 09:26:47,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-04 09:26:47,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-04 09:26:47,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:47,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-04 09:26:47,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,994 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 130 flow. Second operand 3 states and 525 transitions. [2023-08-04 09:26:47,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 258 flow [2023-08-04 09:26:47,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:26:47,996 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 138 flow [2023-08-04 09:26:47,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-08-04 09:26:47,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-04 09:26:47,997 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 138 flow [2023-08-04 09:26:47,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:47,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:47,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:48,004 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 09:26:48,202 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 09:26:48,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:48,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1958443446, now seen corresponding path program 1 times [2023-08-04 09:26:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500738923] [2023-08-04 09:26:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:48,278 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 09:26:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:48,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500738923] [2023-08-04 09:26:48,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500738923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:48,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251433042] [2023-08-04 09:26:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:48,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:48,280 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 09:26:48,283 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 09:26:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:48,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:48,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:48,373 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 09:26:48,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251433042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:48,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:48,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686970747] [2023-08-04 09:26:48,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:48,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:48,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:48,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:48,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:48,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:48,552 INFO L124 PetriNetUnfolderBase]: 1121/1615 cut-off events. [2023-08-04 09:26:48,552 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 09:26:48,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3459 conditions, 1615 events. 1121/1615 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6376 event pairs, 454 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 1414. Up to 1279 conditions per place. [2023-08-04 09:26:48,562 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 49 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:26:48,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 268 flow [2023-08-04 09:26:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-04 09:26:48,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342541436464087 [2023-08-04 09:26:48,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-04 09:26:48,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-04 09:26:48,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:48,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-04 09:26:48,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,569 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 138 flow. Second operand 3 states and 525 transitions. [2023-08-04 09:26:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 268 flow [2023-08-04 09:26:48,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:26:48,573 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 148 flow [2023-08-04 09:26:48,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:26:48,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-04 09:26:48,575 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 148 flow [2023-08-04 09:26:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:48,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:48,584 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 09:26:48,781 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 09:26:48,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:48,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1999787953, now seen corresponding path program 1 times [2023-08-04 09:26:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:48,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160051363] [2023-08-04 09:26:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:48,865 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 09:26:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160051363] [2023-08-04 09:26:48,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160051363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359527156] [2023-08-04 09:26:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:48,867 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 09:26:48,870 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 09:26:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:48,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:48,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:48,962 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 09:26:48,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:48,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359527156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:48,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:48,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:26:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498551060] [2023-08-04 09:26:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 362 [2023-08-04 09:26:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 362 [2023-08-04 09:26:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:49,145 INFO L124 PetriNetUnfolderBase]: 1108/1595 cut-off events. [2023-08-04 09:26:49,145 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:26:49,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 1595 events. 1108/1595 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6262 event pairs, 527 based on Foata normal form. 0/1032 useless extension candidates. Maximal degree in co-relation 2560. Up to 1487 conditions per place. [2023-08-04 09:26:49,153 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 43 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-04 09:26:49,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 258 flow [2023-08-04 09:26:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:26:49,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47974217311233885 [2023-08-04 09:26:49,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:26:49,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:26:49,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:49,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:26:49,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,160 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 148 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:26:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 258 flow [2023-08-04 09:26:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:26:49,163 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 146 flow [2023-08-04 09:26:49,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-04 09:26:49,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 09:26:49,164 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 146 flow [2023-08-04 09:26:49,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:49,165 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] [2023-08-04 09:26:49,172 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 09:26:49,373 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 09:26:49,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:49,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -336283743, now seen corresponding path program 1 times [2023-08-04 09:26:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314260474] [2023-08-04 09:26:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:49,424 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 09:26:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314260474] [2023-08-04 09:26:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314260474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531827144] [2023-08-04 09:26:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:49,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:49,426 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 09:26:49,428 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 09:26:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:49,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:26:49,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:49,553 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 09:26:49,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:26:49,578 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 09:26:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531827144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:26:49,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:26:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:26:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909308116] [2023-08-04 09:26:49,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:26:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:26:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:26:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:49,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 362 [2023-08-04 09:26:49,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:49,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 362 [2023-08-04 09:26:49,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:49,616 INFO L124 PetriNetUnfolderBase]: 9/21 cut-off events. [2023-08-04 09:26:49,616 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:26:49,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 21 events. 9/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 44. Up to 13 conditions per place. [2023-08-04 09:26:49,616 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 09:26:49,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 50 flow [2023-08-04 09:26:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:26:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:26:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-04 09:26:49,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419889502762431 [2023-08-04 09:26:49,619 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-04 09:26:49,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-04 09:26:49,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:49,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-04 09:26:49,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,622 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,623 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 146 flow. Second operand 4 states and 640 transitions. [2023-08-04 09:26:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 50 flow [2023-08-04 09:26:49,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:26:49,638 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 09:26:49,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 09:26:49,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -23 predicate places. [2023-08-04 09:26:49,638 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 09:26:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:49,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:26:49,648 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 09:26:49,846 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 09:26:49,847 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:49,848 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:26:49,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,904 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:26:49,904 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:26:49,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-04 09:26:49,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:26:49,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 09:26:49,960 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 09:26:49,960 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:26:49,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3241 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 371. Up to 16 conditions per place. [2023-08-04 09:26:49,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:26:54,642 INFO L134 LiptonReduction]: Checked pairs total: 8703 [2023-08-04 09:26:54,643 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:26:54,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:26:54,646 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;@1302bcd7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:26:54,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:26:54,649 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:26:54,649 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 09:26:54,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:26:54,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:54,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:26:54,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:26:54,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1692148416, now seen corresponding path program 1 times [2023-08-04 09:26:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:54,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460235579] [2023-08-04 09:26:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:54,756 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 09:26:54,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:54,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460235579] [2023-08-04 09:26:54,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460235579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:54,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:26:54,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:26:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710094221] [2023-08-04 09:26:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:26:54,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 359 [2023-08-04 09:26:54,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:54,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:54,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 359 [2023-08-04 09:26:54,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:55,034 INFO L124 PetriNetUnfolderBase]: 2307/3250 cut-off events. [2023-08-04 09:26:55,034 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-04 09:26:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 3250 events. 2307/3250 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15319 event pairs, 1053 based on Foata normal form. 0/1862 useless extension candidates. Maximal degree in co-relation 5016. Up to 3086 conditions per place. [2023-08-04 09:26:55,053 INFO L140 encePairwiseOnDemand]: 355/359 looper letters, 19 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 09:26:55,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-04 09:26:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-04 09:26:55,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763231197771588 [2023-08-04 09:26:55,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-04 09:26:55,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-04 09:26:55,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:55,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-04 09:26:55,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:55,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:55,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:55,070 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 513 transitions. [2023-08-04 09:26:55,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-04 09:26:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:26:55,074 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 79 flow [2023-08-04 09:26:55,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 09:26:55,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 09:26:55,076 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 79 flow [2023-08-04 09:26:55,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:55,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:55,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:26:55,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:26:55,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1371829634, now seen corresponding path program 1 times [2023-08-04 09:26:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247019665] [2023-08-04 09:26:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:26:55,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:26:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:26:55,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:26:55,159 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:26:55,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:26:55,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:26:55,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:26:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:26:55,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:26:55,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:26:55,161 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:26:55,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:26:55,193 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:26:55,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:55,664 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 09:26:55,665 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:26:55,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33195 event pairs, 11 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 09:26:55,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:55,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:55,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:26:55,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:55,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:55,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 09:26:56,087 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 09:26:56,087 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:26:56,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33195 event pairs, 11 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 09:26:56,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 09:27:01,079 INFO L134 LiptonReduction]: Checked pairs total: 26854 [2023-08-04 09:27:01,079 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-04 09:27:01,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:27:01,081 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;@1302bcd7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:27:01,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:27:01,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:27:01,084 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 09:27:01,084 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:27:01,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:01,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:01,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:01,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1943845516, now seen corresponding path program 1 times [2023-08-04 09:27:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411162205] [2023-08-04 09:27:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:01,114 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 09:27:01,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:01,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411162205] [2023-08-04 09:27:01,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411162205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:01,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:27:01,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:27:01,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753281064] [2023-08-04 09:27:01,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:01,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:01,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:27:01,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:27:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:27:01,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:22,261 INFO L124 PetriNetUnfolderBase]: 282559/337065 cut-off events. [2023-08-04 09:27:22,262 INFO L125 PetriNetUnfolderBase]: For 35330/35330 co-relation queries the response was YES. [2023-08-04 09:27:23,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685343 conditions, 337065 events. 282559/337065 cut-off events. For 35330/35330 co-relation queries the response was YES. Maximal size of possible extension queue 6317. Compared 1588418 event pairs, 121223 based on Foata normal form. 0/188807 useless extension candidates. Maximal degree in co-relation 224681. Up to 327393 conditions per place. [2023-08-04 09:27:24,603 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 09:27:24,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 09:27:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-04 09:27:24,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-04 09:27:24,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-04 09:27:24,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-04 09:27:24,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:24,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-04 09:27:24,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:24,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:24,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:24,611 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 609 transitions. [2023-08-04 09:27:24,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 09:27:24,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:27:24,632 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 09:27:24,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 09:27:24,633 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:27:24,634 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 09:27:24,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:24,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:24,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:24,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:27:24,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:24,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash -704359732, now seen corresponding path program 1 times [2023-08-04 09:27:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610859153] [2023-08-04 09:27:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:24,683 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 09:27:24,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610859153] [2023-08-04 09:27:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610859153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674449580] [2023-08-04 09:27:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:24,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:24,685 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 09:27:24,688 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 09:27:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:24,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:24,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:24,777 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 09:27:24,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:24,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674449580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:24,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:24,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318479496] [2023-08-04 09:27:24,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:24,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:24,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:27:24,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 228 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 09:27:24,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:24,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:27:24,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:44,686 INFO L124 PetriNetUnfolderBase]: 278801/332182 cut-off events. [2023-08-04 09:27:44,686 INFO L125 PetriNetUnfolderBase]: For 32988/32988 co-relation queries the response was YES. [2023-08-04 09:27:45,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675359 conditions, 332182 events. 278801/332182 cut-off events. For 32988/32988 co-relation queries the response was YES. Maximal size of possible extension queue 6462. Compared 1577864 event pairs, 119881 based on Foata normal form. 0/185954 useless extension candidates. Maximal degree in co-relation 675323. Up to 322814 conditions per place. [2023-08-04 09:27:47,130 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:27:47,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 376 flow [2023-08-04 09:27:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:27:47,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-04 09:27:47,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:27:47,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:27:47,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:47,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:27:47,134 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 09:27:47,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:47,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:47,137 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 228 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:27:47,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 376 flow [2023-08-04 09:27:47,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:27:47,241 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 226 flow [2023-08-04 09:27:47,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=71} [2023-08-04 09:27:47,242 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-04 09:27:47,242 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 226 flow [2023-08-04 09:27:47,242 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 09:27:47,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:47,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:27:47,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:27:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:47,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:47,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash 57295127, now seen corresponding path program 1 times [2023-08-04 09:27:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:47,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871741732] [2023-08-04 09:27:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:47,488 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 09:27:47,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:47,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871741732] [2023-08-04 09:27:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871741732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:47,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901707495] [2023-08-04 09:27:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:47,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:47,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:47,491 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 09:27:47,493 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 09:27:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:47,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:47,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:47,585 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 09:27:47,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:47,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901707495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:47,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:47,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043568597] [2023-08-04 09:27:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:47,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:27:47,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:47,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:47,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:27:47,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:06,885 INFO L124 PetriNetUnfolderBase]: 278203/333666 cut-off events. [2023-08-04 09:28:06,885 INFO L125 PetriNetUnfolderBase]: For 16789/16789 co-relation queries the response was YES. [2023-08-04 09:28:07,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675995 conditions, 333666 events. 278203/333666 cut-off events. For 16789/16789 co-relation queries the response was YES. Maximal size of possible extension queue 7023. Compared 1660307 event pairs, 118847 based on Foata normal form. 0/187953 useless extension candidates. Maximal degree in co-relation 233318. Up to 318914 conditions per place. [2023-08-04 09:28:09,172 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 69 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:28:09,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 392 flow [2023-08-04 09:28:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-04 09:28:09,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-08-04 09:28:09,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-04 09:28:09,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-04 09:28:09,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:09,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-04 09:28:09,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:09,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:09,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:09,178 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 226 flow. Second operand 3 states and 616 transitions. [2023-08-04 09:28:09,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 392 flow [2023-08-04 09:28:09,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:09,187 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 236 flow [2023-08-04 09:28:09,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2023-08-04 09:28:09,188 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:28:09,188 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 236 flow [2023-08-04 09:28:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:09,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:09,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:09,195 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 09:28:09,393 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,SelfDestructingSolverStorable11 [2023-08-04 09:28:09,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:09,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 49498685, now seen corresponding path program 1 times [2023-08-04 09:28:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:09,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606037908] [2023-08-04 09:28:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:09,444 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 09:28:09,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:09,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606037908] [2023-08-04 09:28:09,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606037908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:09,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40467180] [2023-08-04 09:28:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:09,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:09,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:09,446 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 09:28:09,449 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 09:28:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:09,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:09,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:09,534 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 09:28:09,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:09,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40467180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:09,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:09,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:09,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902408151] [2023-08-04 09:28:09,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:09,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:09,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:09,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:09,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:28:09,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:09,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:09,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:28:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:27,639 INFO L124 PetriNetUnfolderBase]: 246598/297048 cut-off events. [2023-08-04 09:28:27,639 INFO L125 PetriNetUnfolderBase]: For 12894/12894 co-relation queries the response was YES. [2023-08-04 09:28:28,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606627 conditions, 297048 events. 246598/297048 cut-off events. For 12894/12894 co-relation queries the response was YES. Maximal size of possible extension queue 6223. Compared 1494200 event pairs, 95714 based on Foata normal form. 0/169878 useless extension candidates. Maximal degree in co-relation 225285. Up to 240767 conditions per place. [2023-08-04 09:28:30,330 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 09:28:30,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 451 flow [2023-08-04 09:28:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:28:30,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-04 09:28:30,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:28:30,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:28:30,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:30,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:28:30,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:30,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:30,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:30,340 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 236 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:28:30,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 451 flow [2023-08-04 09:28:30,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:30,367 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 246 flow [2023-08-04 09:28:30,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-04 09:28:30,368 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:28:30,368 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 246 flow [2023-08-04 09:28:30,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:30,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:30,369 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] [2023-08-04 09:28:30,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:28:30,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:28:30,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:30,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash 936314166, now seen corresponding path program 1 times [2023-08-04 09:28:30,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:30,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136610944] [2023-08-04 09:28:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:30,646 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 09:28:30,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:30,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136610944] [2023-08-04 09:28:30,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136610944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:30,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021221989] [2023-08-04 09:28:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:30,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:30,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:28:30,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:28:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:30,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:30,833 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 09:28:30,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021221989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:30,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:30,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969009763] [2023-08-04 09:28:30,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:30,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:30,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:28:30,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:30,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:30,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:28:30,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:47,807 INFO L124 PetriNetUnfolderBase]: 229467/278319 cut-off events. [2023-08-04 09:28:47,807 INFO L125 PetriNetUnfolderBase]: For 25303/25303 co-relation queries the response was YES. [2023-08-04 09:28:48,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581615 conditions, 278319 events. 229467/278319 cut-off events. For 25303/25303 co-relation queries the response was YES. Maximal size of possible extension queue 5089. Compared 1411884 event pairs, 86967 based on Foata normal form. 0/164956 useless extension candidates. Maximal degree in co-relation 229378. Up to 211355 conditions per place. [2023-08-04 09:28:49,659 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 79 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 09:28:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 463 flow [2023-08-04 09:28:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:28:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-04 09:28:49,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:28:49,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:28:49,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:49,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:28:49,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:49,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:49,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:49,665 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 246 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:28:49,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 463 flow [2023-08-04 09:28:50,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:50,029 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 256 flow [2023-08-04 09:28:50,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-04 09:28:50,030 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:28:50,030 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 256 flow [2023-08-04 09:28:50,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:28:50,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:50,030 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] [2023-08-04 09:28:50,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:28:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:28:50,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:50,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1760021158, now seen corresponding path program 1 times [2023-08-04 09:28:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:50,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273584289] [2023-08-04 09:28:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:50,282 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 09:28:50,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273584289] [2023-08-04 09:28:50,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273584289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501886153] [2023-08-04 09:28:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:50,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:50,284 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:28:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:28:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:50,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:50,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:50,394 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 09:28:50,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:50,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501886153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:50,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:50,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:28:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607294751] [2023-08-04 09:28:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:50,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:50,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 420 [2023-08-04 09:28:50,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 256 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 09:28:50,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:50,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 420 [2023-08-04 09:28:50,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:07,209 INFO L124 PetriNetUnfolderBase]: 228401/277734 cut-off events. [2023-08-04 09:29:07,209 INFO L125 PetriNetUnfolderBase]: For 27703/27703 co-relation queries the response was YES. [2023-08-04 09:29:08,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587989 conditions, 277734 events. 228401/277734 cut-off events. For 27703/27703 co-relation queries the response was YES. Maximal size of possible extension queue 4989. Compared 1413978 event pairs, 100117 based on Foata normal form. 0/167999 useless extension candidates. Maximal degree in co-relation 315843. Up to 241882 conditions per place. [2023-08-04 09:29:09,283 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:29:09,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 475 flow [2023-08-04 09:29:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:29:09,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2023-08-04 09:29:09,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:29:09,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:29:09,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:09,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:29:09,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:09,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:09,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:09,290 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 256 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:29:09,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 475 flow [2023-08-04 09:29:11,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:11,973 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 266 flow [2023-08-04 09:29:11,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 09:29:11,973 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:29:11,973 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 266 flow [2023-08-04 09:29:11,974 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 09:29:11,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:11,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:11,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:12,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:29:12,175 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:12,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1377484686, now seen corresponding path program 1 times [2023-08-04 09:29:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594384378] [2023-08-04 09:29:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:12,233 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 09:29:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594384378] [2023-08-04 09:29:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594384378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56526828] [2023-08-04 09:29:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:12,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:12,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:12,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:29:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:12,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:12,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:12,358 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 09:29:12,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:12,374 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 09:29:12,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56526828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:12,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:12,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31329580] [2023-08-04 09:29:12,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:12,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:29:12,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:12,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:12,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:29:12,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:28,384 INFO L124 PetriNetUnfolderBase]: 213305/259296 cut-off events. [2023-08-04 09:29:28,385 INFO L125 PetriNetUnfolderBase]: For 24218/24218 co-relation queries the response was YES. [2023-08-04 09:29:29,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551376 conditions, 259296 events. 213305/259296 cut-off events. For 24218/24218 co-relation queries the response was YES. Maximal size of possible extension queue 4968. Compared 1321068 event pairs, 77387 based on Foata normal form. 3/157638 useless extension candidates. Maximal degree in co-relation 466459. Up to 250738 conditions per place. [2023-08-04 09:29:30,308 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 67 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 09:29:30,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 424 flow [2023-08-04 09:29:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-08-04 09:29:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-08-04 09:29:30,310 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-08-04 09:29:30,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-08-04 09:29:30,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:30,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-08-04 09:29:30,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:30,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:30,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:30,315 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 266 flow. Second operand 4 states and 791 transitions. [2023-08-04 09:29:30,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 424 flow [2023-08-04 09:29:34,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:34,087 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 278 flow [2023-08-04 09:29:34,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-04 09:29:34,087 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 09:29:34,088 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 278 flow [2023-08-04 09:29:34,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:34,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:34,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:34,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:29:34,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:34,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1870632209, now seen corresponding path program 1 times [2023-08-04 09:29:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517771351] [2023-08-04 09:29:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:29:34,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517771351] [2023-08-04 09:29:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517771351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800463469] [2023-08-04 09:29:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:34,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:34,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:34,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:34,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:29:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:34,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:34,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:29:34,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:29:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800463469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:34,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:34,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414640929] [2023-08-04 09:29:34,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:34,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:29:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:29:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:50,916 INFO L124 PetriNetUnfolderBase]: 200726/244116 cut-off events. [2023-08-04 09:29:50,917 INFO L125 PetriNetUnfolderBase]: For 19806/19806 co-relation queries the response was YES. [2023-08-04 09:29:51,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518759 conditions, 244116 events. 200726/244116 cut-off events. For 19806/19806 co-relation queries the response was YES. Maximal size of possible extension queue 4829. Compared 1250572 event pairs, 73555 based on Foata normal form. 27/148623 useless extension candidates. Maximal degree in co-relation 434535. Up to 234954 conditions per place. [2023-08-04 09:29:52,670 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 75 selfloop transitions, 3 changer transitions 1/91 dead transitions. [2023-08-04 09:29:52,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 468 flow [2023-08-04 09:29:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-08-04 09:29:52,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47559523809523807 [2023-08-04 09:29:52,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-08-04 09:29:52,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-08-04 09:29:52,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:52,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-08-04 09:29:52,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:52,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:52,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:52,677 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 278 flow. Second operand 4 states and 799 transitions. [2023-08-04 09:29:52,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 468 flow [2023-08-04 09:29:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 458 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:29:56,314 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 282 flow [2023-08-04 09:29:56,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-04 09:29:56,314 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-04 09:29:56,314 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 282 flow [2023-08-04 09:29:56,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:56,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:56,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:56,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:56,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 09:29:56,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:56,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1617693311, now seen corresponding path program 1 times [2023-08-04 09:29:56,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:56,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465522962] [2023-08-04 09:29:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:56,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:29:56,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465522962] [2023-08-04 09:29:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465522962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479223721] [2023-08-04 09:29:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:56,575 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:56,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:29:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:56,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:56,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:29:56,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:29:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479223721] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:56,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:56,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:56,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837455320] [2023-08-04 09:29:56,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:56,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:56,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:56,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:29:56,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:56,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:56,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:29:56,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:12,437 INFO L124 PetriNetUnfolderBase]: 194489/236502 cut-off events. [2023-08-04 09:30:12,437 INFO L125 PetriNetUnfolderBase]: For 17766/17766 co-relation queries the response was YES. [2023-08-04 09:30:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500225 conditions, 236502 events. 194489/236502 cut-off events. For 17766/17766 co-relation queries the response was YES. Maximal size of possible extension queue 5074. Compared 1226547 event pairs, 68111 based on Foata normal form. 243/144141 useless extension candidates. Maximal degree in co-relation 416483. Up to 212649 conditions per place. [2023-08-04 09:30:14,129 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 83 selfloop transitions, 3 changer transitions 1/99 dead transitions. [2023-08-04 09:30:14,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 504 flow [2023-08-04 09:30:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 807 transitions. [2023-08-04 09:30:14,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48035714285714287 [2023-08-04 09:30:14,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 807 transitions. [2023-08-04 09:30:14,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 807 transitions. [2023-08-04 09:30:14,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:14,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 807 transitions. [2023-08-04 09:30:14,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:14,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:14,136 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:14,136 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 282 flow. Second operand 4 states and 807 transitions. [2023-08-04 09:30:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 504 flow [2023-08-04 09:30:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 494 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:30:17,713 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 286 flow [2023-08-04 09:30:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2023-08-04 09:30:17,714 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 14 predicate places. [2023-08-04 09:30:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 286 flow [2023-08-04 09:30:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:17,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:17,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:17,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:17,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:17,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:17,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1373640878, now seen corresponding path program 1 times [2023-08-04 09:30:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006382643] [2023-08-04 09:30:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:30:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:17,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006382643] [2023-08-04 09:30:17,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006382643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:17,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48506850] [2023-08-04 09:30:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:17,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:17,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:17,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:30:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:18,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:30:18,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:30:18,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:30:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:30:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48506850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:30:18,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:30:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:30:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139445103] [2023-08-04 09:30:18,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:30:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:18,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:18,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:30:18,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 188.2) internal successors, (941), 5 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:18,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:18,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:30:18,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:27,605 INFO L124 PetriNetUnfolderBase]: 121202/148230 cut-off events. [2023-08-04 09:30:27,605 INFO L125 PetriNetUnfolderBase]: For 17502/17502 co-relation queries the response was YES. [2023-08-04 09:30:28,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313224 conditions, 148230 events. 121202/148230 cut-off events. For 17502/17502 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 720273 event pairs, 29065 based on Foata normal form. 1458/91500 useless extension candidates. Maximal degree in co-relation 292334. Up to 71816 conditions per place. [2023-08-04 09:30:28,559 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-04 09:30:28,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 107 transitions, 553 flow [2023-08-04 09:30:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2023-08-04 09:30:28,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2023-08-04 09:30:28,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2023-08-04 09:30:28,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2023-08-04 09:30:28,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:28,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2023-08-04 09:30:28,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:28,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:28,565 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:28,565 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 286 flow. Second operand 4 states and 815 transitions. [2023-08-04 09:30:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 107 transitions, 553 flow [2023-08-04 09:30:29,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 542 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:30:29,990 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 296 flow [2023-08-04 09:30:29,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-08-04 09:30:29,990 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 16 predicate places. [2023-08-04 09:30:29,990 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 296 flow [2023-08-04 09:30:29,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.2) internal successors, (941), 5 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:29,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:29,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:29,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 09:30:30,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:30,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:30,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -97056173, now seen corresponding path program 1 times [2023-08-04 09:30:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:30,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19807460] [2023-08-04 09:30:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:30:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19807460] [2023-08-04 09:30:30,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19807460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342968025] [2023-08-04 09:30:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:30,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:30,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:30:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:30,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:30:30,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:30:30,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:30:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:30:30,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342968025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:30:30,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:30:30,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:30:30,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302862587] [2023-08-04 09:30:30,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:30:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:30,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:30:30,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:30,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:30,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:30:30,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:39,683 INFO L124 PetriNetUnfolderBase]: 115307/140698 cut-off events. [2023-08-04 09:30:39,683 INFO L125 PetriNetUnfolderBase]: For 34004/34004 co-relation queries the response was YES. [2023-08-04 09:30:40,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308597 conditions, 140698 events. 115307/140698 cut-off events. For 34004/34004 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 674602 event pairs, 44506 based on Foata normal form. 694/85904 useless extension candidates. Maximal degree in co-relation 305499. Up to 101420 conditions per place. [2023-08-04 09:30:40,646 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 92 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-08-04 09:30:40,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 564 flow [2023-08-04 09:30:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2023-08-04 09:30:40,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2023-08-04 09:30:40,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2023-08-04 09:30:40,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2023-08-04 09:30:40,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:40,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2023-08-04 09:30:40,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:40,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:40,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:40,653 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 296 flow. Second operand 4 states and 815 transitions. [2023-08-04 09:30:40,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 564 flow [2023-08-04 09:30:42,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 560 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:42,238 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 312 flow [2023-08-04 09:30:42,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2023-08-04 09:30:42,239 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2023-08-04 09:30:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 312 flow [2023-08-04 09:30:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.6) internal successors, (943), 5 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:42,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:42,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:42,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:42,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:42,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:42,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1438050337, now seen corresponding path program 1 times [2023-08-04 09:30:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:42,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804290956] [2023-08-04 09:30:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:30:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804290956] [2023-08-04 09:30:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804290956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562365322] [2023-08-04 09:30:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:42,511 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:42,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:30:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:42,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:30:42,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:30:42,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:30:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:30:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562365322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:30:42,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:30:42,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:30:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113828875] [2023-08-04 09:30:42,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:30:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:30:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:30:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:42,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 420 [2023-08-04 09:30:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 420 [2023-08-04 09:30:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:52,175 INFO L124 PetriNetUnfolderBase]: 115283/140657 cut-off events. [2023-08-04 09:30:52,176 INFO L125 PetriNetUnfolderBase]: For 33870/33870 co-relation queries the response was YES. [2023-08-04 09:30:52,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313746 conditions, 140657 events. 115283/140657 cut-off events. For 33870/33870 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 674463 event pairs, 57259 based on Foata normal form. 19/85200 useless extension candidates. Maximal degree in co-relation 310592. Up to 134406 conditions per place. [2023-08-04 09:30:53,150 INFO L140 encePairwiseOnDemand]: 416/420 looper letters, 91 selfloop transitions, 3 changer transitions 3/109 dead transitions. [2023-08-04 09:30:53,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 582 flow [2023-08-04 09:30:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:30:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:30:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2023-08-04 09:30:53,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2023-08-04 09:30:53,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2023-08-04 09:30:53,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2023-08-04 09:30:53,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:53,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2023-08-04 09:30:53,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:53,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:53,156 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:53,156 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 312 flow. Second operand 4 states and 815 transitions. [2023-08-04 09:30:53,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 582 flow [2023-08-04 09:30:56,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 109 transitions, 578 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:56,105 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 310 flow [2023-08-04 09:30:56,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-08-04 09:30:56,106 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 24 predicate places. [2023-08-04 09:30:56,106 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 310 flow [2023-08-04 09:30:56,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:56,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:56,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:56,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 09:30:56,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:56,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:56,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1101764227, now seen corresponding path program 1 times [2023-08-04 09:30:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551973907] [2023-08-04 09:30:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-08-04 09:30:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551973907] [2023-08-04 09:30:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551973907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:56,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:30:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:30:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262084562] [2023-08-04 09:30:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:56,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:30:56,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 420 [2023-08-04 09:30:56,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:56,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:56,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 420 [2023-08-04 09:30:56,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:04,110 INFO L124 PetriNetUnfolderBase]: 92554/111835 cut-off events. [2023-08-04 09:31:04,110 INFO L125 PetriNetUnfolderBase]: For 25645/25645 co-relation queries the response was YES. [2023-08-04 09:31:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244314 conditions, 111835 events. 92554/111835 cut-off events. For 25645/25645 co-relation queries the response was YES. Maximal size of possible extension queue 2311. Compared 504149 event pairs, 45875 based on Foata normal form. 1/66584 useless extension candidates. Maximal degree in co-relation 244047. Up to 107740 conditions per place. [2023-08-04 09:31:05,276 INFO L140 encePairwiseOnDemand]: 417/420 looper letters, 62 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:31:05,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 440 flow [2023-08-04 09:31:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 09:31:05,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2023-08-04 09:31:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 09:31:05,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 09:31:05,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:05,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 09:31:05,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:05,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:05,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:05,281 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 310 flow. Second operand 3 states and 596 transitions. [2023-08-04 09:31:05,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 440 flow [2023-08-04 09:31:06,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 430 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-04 09:31:06,869 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 312 flow [2023-08-04 09:31:06,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-04 09:31:06,870 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 23 predicate places. [2023-08-04 09:31:06,870 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 312 flow [2023-08-04 09:31:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:06,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:06,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:06,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:31:06,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:06,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1115610082, now seen corresponding path program 1 times [2023-08-04 09:31:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:06,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850055326] [2023-08-04 09:31:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:31:06,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:06,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850055326] [2023-08-04 09:31:06,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850055326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:06,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705549293] [2023-08-04 09:31:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:06,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:06,996 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:07,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 09:31:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:07,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:31:07,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:31:07,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:31:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705549293] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:31:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:31:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470669090] [2023-08-04 09:31:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:31:07,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-08-04 09:31:07,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:07,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:07,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-08-04 09:31:07,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:17,138 INFO L124 PetriNetUnfolderBase]: 112829/136103 cut-off events. [2023-08-04 09:31:17,138 INFO L125 PetriNetUnfolderBase]: For 30814/30814 co-relation queries the response was YES. [2023-08-04 09:31:17,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297233 conditions, 136103 events. 112829/136103 cut-off events. For 30814/30814 co-relation queries the response was YES. Maximal size of possible extension queue 2761. Compared 637322 event pairs, 45876 based on Foata normal form. 0/84774 useless extension candidates. Maximal degree in co-relation 297207. Up to 103991 conditions per place. [2023-08-04 09:31:18,153 INFO L140 encePairwiseOnDemand]: 415/420 looper letters, 114 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-04 09:31:18,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 782 flow [2023-08-04 09:31:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:31:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:31:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 978 transitions. [2023-08-04 09:31:18,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657142857142857 [2023-08-04 09:31:18,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 978 transitions. [2023-08-04 09:31:18,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 978 transitions. [2023-08-04 09:31:18,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:18,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 978 transitions. [2023-08-04 09:31:18,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:18,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:18,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:18,160 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 312 flow. Second operand 5 states and 978 transitions. [2023-08-04 09:31:18,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 782 flow [2023-08-04 09:31:19,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 778 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:19,413 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 324 flow [2023-08-04 09:31:19,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2023-08-04 09:31:19,413 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2023-08-04 09:31:19,413 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 324 flow [2023-08-04 09:31:19,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:19,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:19,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:19,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:19,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:19,617 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:19,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash -260451457, now seen corresponding path program 1 times [2023-08-04 09:31:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:19,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953656181] [2023-08-04 09:31:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:19,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:31:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953656181] [2023-08-04 09:31:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953656181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253269777] [2023-08-04 09:31:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:19,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:19,737 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:19,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 09:31:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:19,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 09:31:19,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:31:19,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-04 09:31:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253269777] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:19,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:31:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-04 09:31:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378746389] [2023-08-04 09:31:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:19,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:31:20,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-08-04 09:31:20,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:20,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:20,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-08-04 09:31:20,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:29,162 INFO L124 PetriNetUnfolderBase]: 107931/131203 cut-off events. [2023-08-04 09:31:29,162 INFO L125 PetriNetUnfolderBase]: For 41145/46051 co-relation queries the response was YES. [2023-08-04 09:31:29,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307319 conditions, 131203 events. 107931/131203 cut-off events. For 41145/46051 co-relation queries the response was YES. Maximal size of possible extension queue 2539. Compared 628399 event pairs, 45881 based on Foata normal form. 4906/89680 useless extension candidates. Maximal degree in co-relation 307284. Up to 100132 conditions per place. [2023-08-04 09:31:30,369 INFO L140 encePairwiseOnDemand]: 415/420 looper letters, 113 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2023-08-04 09:31:30,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 792 flow [2023-08-04 09:31:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:31:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:31:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 976 transitions. [2023-08-04 09:31:30,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46476190476190476 [2023-08-04 09:31:30,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 976 transitions. [2023-08-04 09:31:30,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 976 transitions. [2023-08-04 09:31:30,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:30,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 976 transitions. [2023-08-04 09:31:30,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:30,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:30,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:30,375 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 324 flow. Second operand 5 states and 976 transitions. [2023-08-04 09:31:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 792 flow [2023-08-04 09:31:31,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 781 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:31:31,462 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 332 flow [2023-08-04 09:31:31,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2023-08-04 09:31:31,463 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 29 predicate places. [2023-08-04 09:31:31,463 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 332 flow [2023-08-04 09:31:31,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:31,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:31,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:31,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:31,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:31,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:31,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1128509352, now seen corresponding path program 1 times [2023-08-04 09:31:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38007275] [2023-08-04 09:31:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:31,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:31:31,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:31,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38007275] [2023-08-04 09:31:31,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38007275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:31,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963067655] [2023-08-04 09:31:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:31,824 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:31,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 09:31:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:31,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 09:31:31,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:31:32,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:31:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963067655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:32,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:32,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-04 09:31:32,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419319575] [2023-08-04 09:31:32,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 09:31:32,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 09:31:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-04 09:31:32,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 420 [2023-08-04 09:31:32,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 332 flow. Second operand has 14 states, 14 states have (on average 172.78571428571428) internal successors, (2419), 14 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:32,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:32,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 420 [2023-08-04 09:31:32,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:49,151 INFO L124 PetriNetUnfolderBase]: 181820/222146 cut-off events. [2023-08-04 09:31:49,151 INFO L125 PetriNetUnfolderBase]: For 87239/105434 co-relation queries the response was YES. [2023-08-04 09:31:50,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548099 conditions, 222146 events. 181820/222146 cut-off events. For 87239/105434 co-relation queries the response was YES. Maximal size of possible extension queue 3944. Compared 1145117 event pairs, 14736 based on Foata normal form. 18195/170896 useless extension candidates. Maximal degree in co-relation 548063. Up to 74015 conditions per place. [2023-08-04 09:31:51,299 INFO L140 encePairwiseOnDemand]: 411/420 looper letters, 398 selfloop transitions, 18 changer transitions 0/426 dead transitions. [2023-08-04 09:31:51,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 426 transitions, 2664 flow [2023-08-04 09:31:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 09:31:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 09:31:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2553 transitions. [2023-08-04 09:31:51,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675824175824176 [2023-08-04 09:31:51,303 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2553 transitions. [2023-08-04 09:31:51,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2553 transitions. [2023-08-04 09:31:51,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:51,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2553 transitions. [2023-08-04 09:31:51,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 196.3846153846154) internal successors, (2553), 13 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:51,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:51,312 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:51,312 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 332 flow. Second operand 13 states and 2553 transitions. [2023-08-04 09:31:51,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 426 transitions, 2664 flow [2023-08-04 09:31:54,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 426 transitions, 2632 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-04 09:31:54,949 INFO L231 Difference]: Finished difference. Result has 105 places, 94 transitions, 438 flow [2023-08-04 09:31:54,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=438, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2023-08-04 09:31:54,950 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 44 predicate places. [2023-08-04 09:31:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 438 flow [2023-08-04 09:31:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 172.78571428571428) internal successors, (2419), 14 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:54,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:54,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 09:31:55,160 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:55,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2018454430, now seen corresponding path program 1 times [2023-08-04 09:31:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:55,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792294526] [2023-08-04 09:31:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 09:31:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792294526] [2023-08-04 09:31:55,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792294526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098526549] [2023-08-04 09:31:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:55,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:55,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 09:31:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:55,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:31:55,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 09:31:55,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 09:31:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098526549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:55,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:55,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-04 09:31:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913809076] [2023-08-04 09:31:55,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:55,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:55,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-08-04 09:31:55,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 183.2) internal successors, (916), 5 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:55,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:55,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-08-04 09:31:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:32:17,689 INFO L124 PetriNetUnfolderBase]: 212833/263354 cut-off events. [2023-08-04 09:32:17,690 INFO L125 PetriNetUnfolderBase]: For 290205/316521 co-relation queries the response was YES. [2023-08-04 09:32:19,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769392 conditions, 263354 events. 212833/263354 cut-off events. For 290205/316521 co-relation queries the response was YES. Maximal size of possible extension queue 4855. Compared 1423326 event pairs, 30110 based on Foata normal form. 26316/224199 useless extension candidates. Maximal degree in co-relation 769349. Up to 173710 conditions per place. [2023-08-04 09:32:20,544 INFO L140 encePairwiseOnDemand]: 415/420 looper letters, 203 selfloop transitions, 13 changer transitions 0/227 dead transitions. [2023-08-04 09:32:20,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 227 transitions, 1482 flow [2023-08-04 09:32:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:32:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:32:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-08-04 09:32:20,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-08-04 09:32:20,546 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-08-04 09:32:20,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-08-04 09:32:20,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:32:20,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-08-04 09:32:20,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:32:20,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:32:20,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:32:20,550 INFO L175 Difference]: Start difference. First operand has 105 places, 94 transitions, 438 flow. Second operand 6 states and 1206 transitions. [2023-08-04 09:32:20,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 227 transitions, 1482 flow [2023-08-04 09:32:29,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 227 transitions, 1447 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-08-04 09:32:29,629 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 494 flow [2023-08-04 09:32:29,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2023-08-04 09:32:29,630 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 49 predicate places. [2023-08-04 09:32:29,630 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 494 flow [2023-08-04 09:32:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.2) internal successors, (916), 5 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:32:29,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:32:29,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:32:29,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 09:32:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 09:32:29,831 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:32:29,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:32:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2143926950, now seen corresponding path program 1 times [2023-08-04 09:32:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:32:29,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167170925] [2023-08-04 09:32:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:32:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:32:30,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:32:30,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167170925] [2023-08-04 09:32:30,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167170925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:32:30,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557359442] [2023-08-04 09:32:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:32:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:32:30,781 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:32:30,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 09:32:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:30,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-04 09:32:30,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:32:30,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-08-04 09:32:31,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-04 09:32:31,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-04 09:32:31,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-04 09:32:32,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-04 09:32:32,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 09:32:32,396 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:32:32,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 52 [2023-08-04 09:32:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:32:32,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:32:32,972 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1083 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1083) c_~A~0.base) .cse1))) (or (= c_~min1~0 .cse0) (<= c_~min2~0 .cse0)))) (or (= c_~min2~0 c_~min1~0) (forall ((v_ArrVal_1083 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1083) c_~A~0.base) .cse1) c_~min2~0))))) is different from false [2023-08-04 09:32:36,706 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse3 (forall ((v_ArrVal_1081 (Array Int Int)) (v_ArrVal_1083 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1081) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1083) c_~A~0.base) .cse2) c_~min2~0))) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread2of2ForFork2_~i~0 4))))) (and (or (< .cse0 c_~min1~0) (and (forall ((v_ArrVal_1081 (Array Int Int)) (v_ArrVal_1083 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1081) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1083) c_~A~0.base) .cse2))) (or (<= c_~min2~0 .cse1) (= c_~min1~0 .cse1)))) (or (= c_~min2~0 c_~min1~0) .cse3))) (or (<= c_~min1~0 .cse0) (and (or .cse3 (= c_~min2~0 .cse0)) (forall ((v_ArrVal_1081 (Array Int Int)) (v_ArrVal_1083 (Array Int Int))) (let ((.cse4 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1081) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1083) c_~A~0.base) .cse2))) (or (<= c_~min2~0 .cse4) (= .cse4 .cse0))))))))) is different from false [2023-08-04 09:32:37,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:32:37,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 575 treesize of output 491 [2023-08-04 09:32:37,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 375 treesize of output 369 [2023-08-04 09:32:37,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 369 treesize of output 357 [2023-08-04 09:32:37,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 333 [2023-08-04 09:32:37,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 321 [2023-08-04 09:32:37,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 297 [2023-08-04 09:32:37,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 285 [2023-08-04 09:32:37,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 273 [2023-08-04 09:32:37,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 267 [2023-08-04 09:32:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 13 not checked. [2023-08-04 09:32:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557359442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:32:38,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:32:38,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-04 09:32:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471326764] [2023-08-04 09:32:38,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:32:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 09:32:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:32:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 09:32:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=985, Unknown=19, NotChecked=130, Total=1260 [2023-08-04 09:32:38,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 420 [2023-08-04 09:32:38,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 494 flow. Second operand has 36 states, 36 states have (on average 109.63888888888889) internal successors, (3947), 36 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:32:38,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:32:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 420 [2023-08-04 09:32:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 09:38:43,109 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:38:43,109 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:38:44,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:44,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:47,446 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:38:47,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-04 09:38:47,446 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 09:38:47,447 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:47,447 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 09:38:47,448 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:38:47,448 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:38:47,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:38:47 BasicIcfg [2023-08-04 09:38:47,451 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:38:47,452 INFO L158 Benchmark]: Toolchain (without parser) took 727829.63ms. Allocated memory was 360.7MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 310.8MB in the beginning and 10.2GB in the end (delta: -9.9GB). Peak memory consumption was 6.2GB. Max. memory is 16.0GB. [2023-08-04 09:38:47,452 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 360.7MB. Free memory is still 312.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:38:47,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.53ms. Allocated memory is still 360.7MB. Free memory was 310.6MB in the beginning and 298.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 09:38:47,452 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.36ms. Allocated memory is still 360.7MB. Free memory was 298.4MB in the beginning and 296.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:38:47,452 INFO L158 Benchmark]: Boogie Preprocessor took 33.95ms. Allocated memory is still 360.7MB. Free memory was 296.6MB in the beginning and 294.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:38:47,453 INFO L158 Benchmark]: RCFGBuilder took 449.00ms. Allocated memory is still 360.7MB. Free memory was 294.8MB in the beginning and 271.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-04 09:38:47,453 INFO L158 Benchmark]: TraceAbstraction took 727003.64ms. Allocated memory was 360.7MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 271.0MB in the beginning and 10.2GB in the end (delta: -10.0GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. [2023-08-04 09:38:47,454 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 360.7MB. Free memory is still 312.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 289.53ms. Allocated memory is still 360.7MB. Free memory was 310.6MB in the beginning and 298.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.36ms. Allocated memory is still 360.7MB. Free memory was 298.4MB in the beginning and 296.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.95ms. Allocated memory is still 360.7MB. Free memory was 296.6MB in the beginning and 294.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 449.00ms. Allocated memory is still 360.7MB. Free memory was 294.8MB in the beginning and 271.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 727003.64ms. Allocated memory was 360.7MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 271.0MB in the beginning and 10.2GB in the end (delta: -10.0GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 172 PlacesBefore, 43 PlacesAfterwards, 192 TransitionsBefore, 49 TransitionsAfterwards, 5220 CoEnabledTransitionPairs, 8 FixpointIterations, 62 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 19 ConcurrentYvCompositions, 14 ChoiceCompositions, 170 TotalNumberOfCompositions, 9109 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8613, independent: 8556, independent conditional: 0, independent unconditional: 8556, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2728, independent: 2712, independent conditional: 0, independent unconditional: 2712, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8613, independent: 5844, independent conditional: 0, independent unconditional: 5844, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 2728, unknown conditional: 0, unknown unconditional: 2728] , Statistics on independence cache: Total cache size (in pairs): 177, Positive cache size: 174, Positive conditional cache size: 0, Positive unconditional cache size: 174, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 172 PlacesBefore, 43 PlacesAfterwards, 192 TransitionsBefore, 49 TransitionsAfterwards, 5220 CoEnabledTransitionPairs, 7 FixpointIterations, 60 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 19 ConcurrentYvCompositions, 14 ChoiceCompositions, 167 TotalNumberOfCompositions, 8703 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8267, independent: 8214, independent conditional: 0, independent unconditional: 8214, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2749, independent: 2732, independent conditional: 0, independent unconditional: 2732, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8267, independent: 5482, independent conditional: 0, independent unconditional: 5482, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 2749, unknown conditional: 0, unknown unconditional: 2749] , Statistics on independence cache: Total cache size (in pairs): 180, Positive cache size: 177, Positive conditional cache size: 0, Positive unconditional cache size: 177, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 205 PlacesBefore, 61 PlacesAfterwards, 234 TransitionsBefore, 73 TransitionsAfterwards, 13500 CoEnabledTransitionPairs, 7 FixpointIterations, 58 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 25 ConcurrentYvCompositions, 17 ChoiceCompositions, 186 TotalNumberOfCompositions, 26854 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 25431, independent: 25358, independent conditional: 0, independent unconditional: 25358, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7107, independent: 7089, independent conditional: 0, independent unconditional: 7089, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 25431, independent: 18269, independent conditional: 0, independent unconditional: 18269, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 7107, unknown conditional: 0, unknown unconditional: 7107] , Statistics on independence cache: Total cache size (in pairs): 597, Positive cache size: 594, Positive conditional cache size: 0, Positive unconditional cache size: 594, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 193 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.2s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 561 IncrementalHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 11 mSDtfsCounter, 561 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 266 NumberOfCodeBlocks, 266 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 383 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1077 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 220 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 712.3s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 691.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3376 SdHoareTripleChecker+Valid, 22.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3048 mSDsluCounter, 2914 SdHoareTripleChecker+Invalid, 20.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3801 IncrementalHoareTripleChecker+Unchecked, 2689 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25862 IncrementalHoareTripleChecker+Invalid, 29802 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 225 mSDtfsCounter, 25862 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1643 GetRequests, 1343 SyntacticMatches, 39 SemanticMatches, 261 ConstructedPredicates, 2 IntricatePredicates, 12 DeprecatedPredicates, 12464 ImplicationChecksByTransitivity, 290.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=494occurred in iteration=17, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 1586 NumberOfCodeBlocks, 1586 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2190 ConstructedInterpolants, 26 QuantifiedInterpolants, 8954 SizeOfPredicates, 42 NumberOfNonLiveVariables, 4015 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 823/927 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 193 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 109 IncrementalHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 1 mSDtfsCounter, 109 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown