/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/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:01:41,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:01:41,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:01:41,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:01:41,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:01:41,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:01:41,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:01:41,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:01:41,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:01:41,704 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:01:41,704 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:01:41,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:01:41,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:01:41,706 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:01:41,707 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:01:41,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:01:41,707 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:01:41,707 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:01:41,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:01:41,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:01:41,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:01:41,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:01:41,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:01:41,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:01:41,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:01:41,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:01:41,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:01:41,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:01:41,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:01:41,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:01:41,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:01:41,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:01:41,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:01:41,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:01:41,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:01:41,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:01:41,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:01:41,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:01:41,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:01:41,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:01:41,712 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:01:41,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:01:41,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:01:41,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:01:41,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:01:41,928 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:01:41,928 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:01:41,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:01:43,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:01:43,229 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:01:43,229 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:01:43,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/174844bfa/cf5096063dd44c1cbdc74d17cc620ff1/FLAG42c1ea88d [2023-08-04 07:01:43,257 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/174844bfa/cf5096063dd44c1cbdc74d17cc620ff1 [2023-08-04 07:01:43,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:01:43,261 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:01:43,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:01:43,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:01:43,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:01:43,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d33f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43, skipping insertion in model container [2023-08-04 07:01:43,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,310 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:01:43,475 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:01:43,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:01:43,598 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:01:43,608 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:01:43,616 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:01:43,617 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:01:43,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:01:43,684 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:01:43,685 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:01:43,691 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:01:43,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43 WrapperNode [2023-08-04 07:01:43,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:01:43,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:01:43,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:01:43,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:01:43,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,731 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,752 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2023-08-04 07:01:43,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:01:43,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:01:43,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:01:43,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:01:43,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,777 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,784 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:01:43,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:01:43,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:01:43,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:01:43,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (1/1) ... [2023-08-04 07:01:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:01:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:43,826 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 07:01:43,831 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 07:01:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:01:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:01:43,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:01:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:01:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:01:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:01:43,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:01:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:01:43,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:01:43,860 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:01:43,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:01:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:01:43,861 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:01:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:01:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:01:43,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:01:43,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:01:43,863 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 07:01:43,971 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:01:43,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:01:44,169 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:01:44,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:01:44,176 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:01:44,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:01:44 BoogieIcfgContainer [2023-08-04 07:01:44,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:01:44,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:01:44,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:01:44,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:01:44,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:01:43" (1/3) ... [2023-08-04 07:01:44,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a05db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:01:44, skipping insertion in model container [2023-08-04 07:01:44,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:43" (2/3) ... [2023-08-04 07:01:44,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a05db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:01:44, skipping insertion in model container [2023-08-04 07:01:44,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:01:44" (3/3) ... [2023-08-04 07:01:44,186 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:01:44,193 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:01:44,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:01:44,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:01:44,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:01:44,263 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:01:44,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 07:01:44,476 INFO L124 PetriNetUnfolderBase]: 62/859 cut-off events. [2023-08-04 07:01:44,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:44,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 859 events. 62/859 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5307 event pairs, 0 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 512. Up to 32 conditions per place. [2023-08-04 07:01:44,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 07:01:44,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 108 transitions, 228 flow [2023-08-04 07:01:44,501 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:44,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 108 transitions, 228 flow [2023-08-04 07:01:44,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 108 transitions, 228 flow [2023-08-04 07:01:44,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 108 transitions, 228 flow [2023-08-04 07:01:44,562 INFO L124 PetriNetUnfolderBase]: 46/620 cut-off events. [2023-08-04 07:01:44,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:44,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 620 events. 46/620 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3417 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 386. Up to 32 conditions per place. [2023-08-04 07:01:44,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 2414 [2023-08-04 07:01:46,630 INFO L134 LiptonReduction]: Checked pairs total: 3443 [2023-08-04 07:01:46,631 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-04 07:01:46,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:01:46,648 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;@3a133600, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:46,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:01:46,652 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:46,652 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 07:01:46,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:46,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:46,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:01:46,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:46,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash 419400742, now seen corresponding path program 1 times [2023-08-04 07:01:46,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:46,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130747511] [2023-08-04 07:01:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:01:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130747511] [2023-08-04 07:01:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130747511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:46,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:01:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:01:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568650794] [2023-08-04 07:01:46,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:01:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 215 [2023-08-04 07:01:46,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:46,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:46,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 215 [2023-08-04 07:01:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:47,345 INFO L124 PetriNetUnfolderBase]: 2144/3245 cut-off events. [2023-08-04 07:01:47,345 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 07:01:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6611 conditions, 3245 events. 2144/3245 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17157 event pairs, 1782 based on Foata normal form. 0/2978 useless extension candidates. Maximal degree in co-relation 6597. Up to 3228 conditions per place. [2023-08-04 07:01:47,366 INFO L140 encePairwiseOnDemand]: 211/215 looper letters, 26 selfloop transitions, 2 changer transitions 1/31 dead transitions. [2023-08-04 07:01:47,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 132 flow [2023-08-04 07:01:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-04 07:01:47,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643410852713179 [2023-08-04 07:01:47,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-04 07:01:47,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-04 07:01:47,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:47,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-04 07:01:47,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,393 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 70 flow. Second operand 3 states and 364 transitions. [2023-08-04 07:01:47,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 132 flow [2023-08-04 07:01:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:01:47,397 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 76 flow [2023-08-04 07:01:47,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 07:01:47,401 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-04 07:01:47,401 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 76 flow [2023-08-04 07:01:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:47,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:01:47,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:47,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1185356570, now seen corresponding path program 1 times [2023-08-04 07:01:47,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:47,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743206022] [2023-08-04 07:01:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:47,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:47,485 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 07:01:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743206022] [2023-08-04 07:01:47,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743206022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727356398] [2023-08-04 07:01:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:47,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:47,490 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 07:01:47,523 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 07:01:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:47,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:47,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:47,609 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 07:01:47,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:47,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727356398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:47,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:47,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728091546] [2023-08-04 07:01:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:47,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 215 [2023-08-04 07:01:47,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:47,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 215 [2023-08-04 07:01:47,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:47,834 INFO L124 PetriNetUnfolderBase]: 1748/2585 cut-off events. [2023-08-04 07:01:47,835 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:01:47,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5276 conditions, 2585 events. 1748/2585 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12591 event pairs, 1204 based on Foata normal form. 0/2386 useless extension candidates. Maximal degree in co-relation 5259. Up to 2551 conditions per place. [2023-08-04 07:01:47,848 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 28 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:01:47,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 148 flow [2023-08-04 07:01:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-04 07:01:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658914728682171 [2023-08-04 07:01:47,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-04 07:01:47,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-04 07:01:47,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:47,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-04 07:01:47,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,856 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 76 flow. Second operand 3 states and 365 transitions. [2023-08-04 07:01:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 148 flow [2023-08-04 07:01:47,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:47,858 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 80 flow [2023-08-04 07:01:47,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-04 07:01:47,859 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-04 07:01:47,859 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 80 flow [2023-08-04 07:01:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:47,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:47,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:47,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:01:48,064 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 07:01:48,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:48,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1088123609, now seen corresponding path program 1 times [2023-08-04 07:01:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:48,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599865732] [2023-08-04 07:01:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:48,155 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 07:01:48,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599865732] [2023-08-04 07:01:48,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599865732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308651208] [2023-08-04 07:01:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:48,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:48,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:48,158 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 07:01:48,161 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 07:01:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:48,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:48,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:48,269 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 07:01:48,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:48,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308651208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:48,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:48,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:48,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630658935] [2023-08-04 07:01:48,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:48,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:48,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:48,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 215 [2023-08-04 07:01:48,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:48,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 215 [2023-08-04 07:01:48,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:48,478 INFO L124 PetriNetUnfolderBase]: 1448/2114 cut-off events. [2023-08-04 07:01:48,479 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 07:01:48,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2114 events. 1448/2114 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9720 event pairs, 1010 based on Foata normal form. 0/1978 useless extension candidates. Maximal degree in co-relation 4326. Up to 2000 conditions per place. [2023-08-04 07:01:48,490 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:01:48,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 160 flow [2023-08-04 07:01:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 07:01:48,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689922480620155 [2023-08-04 07:01:48,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 07:01:48,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 07:01:48,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:48,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 07:01:48,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,496 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 80 flow. Second operand 3 states and 367 transitions. [2023-08-04 07:01:48,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 160 flow [2023-08-04 07:01:48,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:48,498 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 84 flow [2023-08-04 07:01:48,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 07:01:48,499 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-04 07:01:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 84 flow [2023-08-04 07:01:48,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:48,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:48,510 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 07:01:48,705 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 07:01:48,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:48,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1915787418, now seen corresponding path program 1 times [2023-08-04 07:01:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:48,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591692318] [2023-08-04 07:01:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:48,768 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 07:01:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591692318] [2023-08-04 07:01:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591692318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382065414] [2023-08-04 07:01:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:48,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:48,770 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 07:01:48,774 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 07:01:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:48,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:48,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:48,864 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 07:01:48,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382065414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:48,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725498634] [2023-08-04 07:01:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:48,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:48,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 215 [2023-08-04 07:01:48,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:48,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:48,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 215 [2023-08-04 07:01:48,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:49,053 INFO L124 PetriNetUnfolderBase]: 1340/1952 cut-off events. [2023-08-04 07:01:49,054 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-04 07:01:49,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 1952 events. 1340/1952 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8720 event pairs, 854 based on Foata normal form. 0/1861 useless extension candidates. Maximal degree in co-relation 4080. Up to 1538 conditions per place. [2023-08-04 07:01:49,070 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 32 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-08-04 07:01:49,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 172 flow [2023-08-04 07:01:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 07:01:49,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2023-08-04 07:01:49,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 07:01:49,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 07:01:49,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:49,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 07:01:49,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,076 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 84 flow. Second operand 3 states and 369 transitions. [2023-08-04 07:01:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 172 flow [2023-08-04 07:01:49,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:49,079 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 88 flow [2023-08-04 07:01:49,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 07:01:49,081 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-04 07:01:49,081 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 88 flow [2023-08-04 07:01:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:49,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:49,092 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 07:01:49,287 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 07:01:49,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:49,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1679799894, now seen corresponding path program 1 times [2023-08-04 07:01:49,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:49,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108399037] [2023-08-04 07:01:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:49,333 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 07:01:49,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:49,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108399037] [2023-08-04 07:01:49,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108399037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:49,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288382996] [2023-08-04 07:01:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:49,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:49,336 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 07:01:49,375 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 07:01:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:49,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:01:49,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:49,465 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 07:01:49,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:01:49,480 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 07:01:49,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288382996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:01:49,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:01:49,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:01:49,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636979521] [2023-08-04 07:01:49,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:01:49,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:01:49,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:01:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:49,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 215 [2023-08-04 07:01:49,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:49,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 215 [2023-08-04 07:01:49,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:49,509 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:01:49,509 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:01:49,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:01:49,509 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:01:49,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:01:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:01:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:01:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-04 07:01:49,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2023-08-04 07:01:49,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-04 07:01:49,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-04 07:01:49,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:49,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-04 07:01:49,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,515 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 88 flow. Second operand 4 states and 450 transitions. [2023-08-04 07:01:49,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:01:49,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:01:49,515 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:01:49,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 07:01:49,516 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -17 predicate places. [2023-08-04 07:01:49,516 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:01:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:49,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:01:49,527 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 07:01:49,725 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 07:01:49,725 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:01:49,727 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:01:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 07:01:49,785 INFO L124 PetriNetUnfolderBase]: 62/859 cut-off events. [2023-08-04 07:01:49,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:49,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 859 events. 62/859 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5307 event pairs, 0 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 512. Up to 32 conditions per place. [2023-08-04 07:01:49,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 126 transitions, 272 flow [2023-08-04 07:01:49,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 96 transitions, 212 flow [2023-08-04 07:01:49,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:49,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 96 transitions, 212 flow [2023-08-04 07:01:49,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 96 transitions, 212 flow [2023-08-04 07:01:49,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 96 transitions, 212 flow [2023-08-04 07:01:49,810 INFO L124 PetriNetUnfolderBase]: 14/379 cut-off events. [2023-08-04 07:01:49,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 379 events. 14/379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1726 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-04 07:01:49,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 1822 [2023-08-04 07:01:51,502 INFO L134 LiptonReduction]: Checked pairs total: 2724 [2023-08-04 07:01:51,502 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-04 07:01:51,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:01:51,505 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;@3a133600, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:51,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:01:51,509 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:51,509 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:01:51,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:51,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:51,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:01:51,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:01:51,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2027904008, now seen corresponding path program 1 times [2023-08-04 07:01:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468033463] [2023-08-04 07:01:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:01:51,524 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:01:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:01:51,543 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:01:51,543 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:01:51,543 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:01:51,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:01:51,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:01:51,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:01:51,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:01:51,544 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:01:51,545 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:01:51,545 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:01:51,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:01:51,568 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:01:51,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 07:01:51,922 INFO L124 PetriNetUnfolderBase]: 282/4024 cut-off events. [2023-08-04 07:01:51,922 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:01:51,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 4024 events. 282/4024 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38240 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 2927. Up to 162 conditions per place. [2023-08-04 07:01:51,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 352 flow [2023-08-04 07:01:51,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 134 transitions, 300 flow [2023-08-04 07:01:51,956 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:51,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 134 transitions, 300 flow [2023-08-04 07:01:51,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 134 transitions, 300 flow [2023-08-04 07:01:51,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 300 flow [2023-08-04 07:01:52,176 INFO L124 PetriNetUnfolderBase]: 201/2850 cut-off events. [2023-08-04 07:01:52,177 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:01:52,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 2850 events. 201/2850 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 24878 event pairs, 0 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 2132. Up to 162 conditions per place. [2023-08-04 07:01:52,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 5976 [2023-08-04 07:01:54,168 INFO L134 LiptonReduction]: Checked pairs total: 10765 [2023-08-04 07:01:54,169 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 07:01:54,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:01:54,171 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;@3a133600, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:54,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:01:54,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:54,173 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 07:01:54,173 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:54,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:54,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:01:54,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:54,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:54,174 INFO L85 PathProgramCache]: Analyzing trace with hash 751559425, now seen corresponding path program 1 times [2023-08-04 07:01:54,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:54,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934729637] [2023-08-04 07:01:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:54,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:54,207 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 07:01:54,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934729637] [2023-08-04 07:01:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934729637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:01:54,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:01:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055947013] [2023-08-04 07:01:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:01:54,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 07:01:54,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:54,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:54,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 07:01:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:02:41,542 INFO L124 PetriNetUnfolderBase]: 576290/730005 cut-off events. [2023-08-04 07:02:41,542 INFO L125 PetriNetUnfolderBase]: For 20613/20613 co-relation queries the response was YES. [2023-08-04 07:02:44,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466686 conditions, 730005 events. 576290/730005 cut-off events. For 20613/20613 co-relation queries the response was YES. Maximal size of possible extension queue 15711. Compared 4787058 event pairs, 485484 based on Foata normal form. 0/690936 useless extension candidates. Maximal degree in co-relation 432900. Up to 712500 conditions per place. [2023-08-04 07:02:46,467 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 07:02:46,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-04 07:02:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:02:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:02:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 07:02:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930388219544847 [2023-08-04 07:02:46,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 07:02:46,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 07:02:46,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:02:46,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 07:02:46,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:02:46,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:02:46,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:02:46,476 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 126 flow. Second operand 3 states and 443 transitions. [2023-08-04 07:02:46,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-04 07:02:46,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:02:46,487 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 136 flow [2023-08-04 07:02:46,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=136, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 07:02:46,488 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 07:02:46,488 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 136 flow [2023-08-04 07:02:46,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:02:46,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:02:46,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:02:46,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:02:46,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:02:46,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:02:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2035341469, now seen corresponding path program 1 times [2023-08-04 07:02:46,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:02:46,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244828432] [2023-08-04 07:02:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:02:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:02:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:02:46,534 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 07:02:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:02:46,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244828432] [2023-08-04 07:02:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244828432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:02:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654991189] [2023-08-04 07:02:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:02:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:02:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:02:46,536 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 07:02:46,538 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 07:02:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:02:46,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:02:46,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:02:46,615 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 07:02:46,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:02:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654991189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:02:46,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:02:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:02:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142725319] [2023-08-04 07:02:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:02:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:02:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:02:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:02:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:02:46,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 07:02:46,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:02:46,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:02:46,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 07:02:46,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:03:33,302 INFO L124 PetriNetUnfolderBase]: 543278/690581 cut-off events. [2023-08-04 07:03:33,302 INFO L125 PetriNetUnfolderBase]: For 18135/18135 co-relation queries the response was YES. [2023-08-04 07:03:36,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381992 conditions, 690581 events. 543278/690581 cut-off events. For 18135/18135 co-relation queries the response was YES. Maximal size of possible extension queue 15483. Compared 4551689 event pairs, 459424 based on Foata normal form. 0/655829 useless extension candidates. Maximal degree in co-relation 1381953. Up to 668923 conditions per place. [2023-08-04 07:03:38,716 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 07:03:38,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 246 flow [2023-08-04 07:03:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:03:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:03:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-04 07:03:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970548862115127 [2023-08-04 07:03:38,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-04 07:03:38,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-04 07:03:38,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:03:38,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-04 07:03:38,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:38,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:38,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:38,721 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 136 flow. Second operand 3 states and 446 transitions. [2023-08-04 07:03:38,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 246 flow [2023-08-04 07:03:38,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:03:38,723 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 146 flow [2023-08-04 07:03:38,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 07:03:38,724 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 07:03:38,724 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 146 flow [2023-08-04 07:03:38,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:38,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:03:38,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:03:38,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:03:38,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:03:38,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:03:38,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:03:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -94956508, now seen corresponding path program 1 times [2023-08-04 07:03:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:03:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679042498] [2023-08-04 07:03:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:03:38,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:03:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:03:38,989 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 07:03:38,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:03:38,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679042498] [2023-08-04 07:03:38,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679042498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:03:38,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725308806] [2023-08-04 07:03:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:03:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:03:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:03:38,992 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 07:03:38,994 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 07:03:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:03:39,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:03:39,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:03:39,078 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 07:03:39,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:03:39,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725308806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:03:39,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:03:39,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:03:39,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817976058] [2023-08-04 07:03:39,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:03:39,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:03:39,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:03:39,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:03:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:03:39,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 07:03:39,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:39,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:03:39,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 07:03:39,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:23,184 INFO L124 PetriNetUnfolderBase]: 512846/641426 cut-off events. [2023-08-04 07:04:23,185 INFO L125 PetriNetUnfolderBase]: For 15521/15521 co-relation queries the response was YES. [2023-08-04 07:04:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291939 conditions, 641426 events. 512846/641426 cut-off events. For 15521/15521 co-relation queries the response was YES. Maximal size of possible extension queue 14999. Compared 4059515 event pairs, 434270 based on Foata normal form. 0/613619 useless extension candidates. Maximal degree in co-relation 384726. Up to 627005 conditions per place. [2023-08-04 07:04:28,021 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 07:04:28,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 274 flow [2023-08-04 07:04:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-04 07:04:28,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 07:04:28,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-04 07:04:28,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-04 07:04:28,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:28,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-04 07:04:28,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:28,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:28,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:28,025 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 146 flow. Second operand 3 states and 450 transitions. [2023-08-04 07:04:28,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 274 flow [2023-08-04 07:04:28,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:04:28,028 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 156 flow [2023-08-04 07:04:28,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=156, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-04 07:04:28,028 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 07:04:28,028 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 156 flow [2023-08-04 07:04:28,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:28,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:28,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:28,034 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 07:04:28,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:28,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:28,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2138007442, now seen corresponding path program 1 times [2023-08-04 07:04:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205320281] [2023-08-04 07:04:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:28,276 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 07:04:28,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:28,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205320281] [2023-08-04 07:04:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205320281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782875229] [2023-08-04 07:04:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:28,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:28,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:28,287 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 07:04:28,325 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 07:04:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:28,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:04:28,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:28,409 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 07:04:28,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:04:28,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782875229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:28,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:04:28,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:04:28,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996874690] [2023-08-04 07:04:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 249 [2023-08-04 07:04:28,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:28,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:28,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 249 [2023-08-04 07:04:28,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:12,604 INFO L124 PetriNetUnfolderBase]: 500750/624398 cut-off events. [2023-08-04 07:05:12,605 INFO L125 PetriNetUnfolderBase]: For 10153/10153 co-relation queries the response was YES. [2023-08-04 07:05:15,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263356 conditions, 624398 events. 500750/624398 cut-off events. For 10153/10153 co-relation queries the response was YES. Maximal size of possible extension queue 14869. Compared 3844165 event pairs, 404846 based on Foata normal form. 0/601775 useless extension candidates. Maximal degree in co-relation 370844. Up to 574973 conditions per place. [2023-08-04 07:05:17,559 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 07:05:17,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 302 flow [2023-08-04 07:05:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 07:05:17,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607764390896921 [2023-08-04 07:05:17,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 07:05:17,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 07:05:17,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:17,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 07:05:17,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:17,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:17,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:17,565 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 156 flow. Second operand 3 states and 454 transitions. [2023-08-04 07:05:17,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 302 flow [2023-08-04 07:05:17,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:17,595 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 166 flow [2023-08-04 07:05:17,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-08-04 07:05:17,596 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 07:05:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 166 flow [2023-08-04 07:05:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:17,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:17,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:17,604 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 07:05:17,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:17,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:17,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash -106375744, now seen corresponding path program 1 times [2023-08-04 07:05:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:17,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457973199] [2023-08-04 07:05:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:17,861 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 07:05:17,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:17,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457973199] [2023-08-04 07:05:17,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457973199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:17,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786416601] [2023-08-04 07:05:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:17,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:17,863 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 07:05:17,869 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 07:05:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:17,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:17,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:17,977 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 07:05:17,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:17,999 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 07:05:17,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786416601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:17,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:05:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522236762] [2023-08-04 07:05:18,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:05:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:05:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:18,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 07:05:18,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:18,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:18,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 07:05:18,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:54,678 INFO L124 PetriNetUnfolderBase]: 389704/482120 cut-off events. [2023-08-04 07:05:54,678 INFO L125 PetriNetUnfolderBase]: For 43953/43953 co-relation queries the response was YES. [2023-08-04 07:05:57,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011464 conditions, 482120 events. 389704/482120 cut-off events. For 43953/43953 co-relation queries the response was YES. Maximal size of possible extension queue 11678. Compared 2842079 event pairs, 276612 based on Foata normal form. 3/480386 useless extension candidates. Maximal degree in co-relation 355983. Up to 474490 conditions per place. [2023-08-04 07:05:58,722 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 07:05:58,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 58 transitions, 282 flow [2023-08-04 07:05:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-04 07:05:58,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783132530120482 [2023-08-04 07:05:58,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-04 07:05:58,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-04 07:05:58,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:58,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-04 07:05:58,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:58,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:58,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:58,728 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 166 flow. Second operand 4 states and 576 transitions. [2023-08-04 07:05:58,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 58 transitions, 282 flow [2023-08-04 07:05:58,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:58,974 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 178 flow [2023-08-04 07:05:58,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2023-08-04 07:05:58,975 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 07:05:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 178 flow [2023-08-04 07:05:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:58,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:58,976 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] [2023-08-04 07:05:58,980 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 07:05:59,176 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,SelfDestructingSolverStorable10 [2023-08-04 07:05:59,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:59,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1085140560, now seen corresponding path program 1 times [2023-08-04 07:05:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928139583] [2023-08-04 07:05:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:59,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:05:59,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928139583] [2023-08-04 07:05:59,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928139583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014180853] [2023-08-04 07:05:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:59,241 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 07:05:59,244 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 07:05:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:59,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:59,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:05:59,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:05:59,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014180853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:59,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:59,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:05:59,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197422603] [2023-08-04 07:05:59,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:59,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:05:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:05:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:59,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 07:05:59,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:59,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:59,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 07:05:59,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:23,823 INFO L124 PetriNetUnfolderBase]: 303022/372454 cut-off events. [2023-08-04 07:06:23,824 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 07:06:25,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777479 conditions, 372454 events. 303022/372454 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 9749. Compared 2099837 event pairs, 217966 based on Foata normal form. 27/371176 useless extension candidates. Maximal degree in co-relation 273290. Up to 365929 conditions per place. [2023-08-04 07:06:26,940 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 54 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 07:06:26,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 326 flow [2023-08-04 07:06:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:06:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:06:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-04 07:06:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863453815261044 [2023-08-04 07:06:26,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-04 07:06:26,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-04 07:06:26,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:26,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-04 07:06:26,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:26,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:26,946 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 178 flow. Second operand 4 states and 584 transitions. [2023-08-04 07:06:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 326 flow [2023-08-04 07:06:27,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:06:27,019 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 185 flow [2023-08-04 07:06:27,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2023-08-04 07:06:27,020 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-04 07:06:27,020 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 185 flow [2023-08-04 07:06:27,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:27,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:27,021 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] [2023-08-04 07:06:27,030 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 07:06:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:27,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:27,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash 893114162, now seen corresponding path program 1 times [2023-08-04 07:06:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:27,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959810764] [2023-08-04 07:06:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:27,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:06:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:27,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959810764] [2023-08-04 07:06:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959810764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:27,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625519227] [2023-08-04 07:06:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:27,291 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 07:06:27,296 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 07:06:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:27,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:06:27,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:06:27,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:06:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:06:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625519227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:06:27,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:06:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:06:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810683918] [2023-08-04 07:06:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:06:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:06:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:06:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:27,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 07:06:27,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 07:06:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:47,624 INFO L124 PetriNetUnfolderBase]: 237520/289942 cut-off events. [2023-08-04 07:06:47,624 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 07:06:49,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605632 conditions, 289942 events. 237520/289942 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 8808. Compared 1591951 event pairs, 168724 based on Foata normal form. 243/289366 useless extension candidates. Maximal degree in co-relation 212642. Up to 275692 conditions per place. [2023-08-04 07:06:50,089 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 07:06:50,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 365 flow [2023-08-04 07:06:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:06:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:06:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-04 07:06:50,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943775100401606 [2023-08-04 07:06:50,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-04 07:06:50,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-04 07:06:50,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:50,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-04 07:06:50,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:50,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:50,095 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:50,095 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 185 flow. Second operand 4 states and 592 transitions. [2023-08-04 07:06:50,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 365 flow [2023-08-04 07:06:50,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 358 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:06:50,259 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 192 flow [2023-08-04 07:06:50,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-04 07:06:50,259 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-08-04 07:06:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 192 flow [2023-08-04 07:06:50,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:50,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:50,260 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] [2023-08-04 07:06:50,265 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 07:06:50,460 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,SelfDestructingSolverStorable12 [2023-08-04 07:06:50,461 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:50,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1633625701, now seen corresponding path program 1 times [2023-08-04 07:06:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:50,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829038388] [2023-08-04 07:06:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:06:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:50,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829038388] [2023-08-04 07:06:50,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829038388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736945159] [2023-08-04 07:06:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:50,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:50,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:50,520 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 07:06:50,522 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 07:06:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:50,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:06:50,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:06:50,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:06:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:06:50,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736945159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:06:50,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:06:50,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:06:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160895968] [2023-08-04 07:06:50,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:06:50,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:06:50,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:50,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:06:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:50,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 249 [2023-08-04 07:06:50,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:50,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:50,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 249 [2023-08-04 07:06:50,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:07,886 INFO L124 PetriNetUnfolderBase]: 214192/261673 cut-off events. [2023-08-04 07:07:07,886 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 07:07:09,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549490 conditions, 261673 events. 214192/261673 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8224. Compared 1392457 event pairs, 91720 based on Foata normal form. 2187/263041 useless extension candidates. Maximal degree in co-relation 192794. Up to 135913 conditions per place. [2023-08-04 07:07:10,247 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 70 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-04 07:07:10,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 404 flow [2023-08-04 07:07:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-04 07:07:10,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 07:07:10,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-04 07:07:10,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-04 07:07:10,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:10,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-04 07:07:10,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:10,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:10,253 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:10,253 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 192 flow. Second operand 4 states and 600 transitions. [2023-08-04 07:07:10,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 404 flow [2023-08-04 07:07:10,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:07:10,320 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 199 flow [2023-08-04 07:07:10,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-08-04 07:07:10,320 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 07:07:10,321 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 199 flow [2023-08-04 07:07:10,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:10,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:10,321 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] [2023-08-04 07:07:10,326 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 07:07:10,522 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,SelfDestructingSolverStorable13 [2023-08-04 07:07:10,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:10,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash 641257454, now seen corresponding path program 1 times [2023-08-04 07:07:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856831299] [2023-08-04 07:07:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:07:10,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:10,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856831299] [2023-08-04 07:07:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856831299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:07:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136038874] [2023-08-04 07:07:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:07:10,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 249 [2023-08-04 07:07:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:10,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 249 [2023-08-04 07:07:10,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:09:05,313 INFO L124 PetriNetUnfolderBase]: 1131763/1368093 cut-off events. [2023-08-04 07:09:05,314 INFO L125 PetriNetUnfolderBase]: For 477316/477316 co-relation queries the response was YES. [2023-08-04 07:09:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050916 conditions, 1368093 events. 1131763/1368093 cut-off events. For 477316/477316 co-relation queries the response was YES. Maximal size of possible extension queue 28160. Compared 7610693 event pairs, 332178 based on Foata normal form. 19441/1386670 useless extension candidates. Maximal degree in co-relation 3049314. Up to 825646 conditions per place. [2023-08-04 07:09:20,327 INFO L140 encePairwiseOnDemand]: 235/249 looper letters, 76 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2023-08-04 07:09:20,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 556 flow [2023-08-04 07:09:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:09:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:09:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-04 07:09:20,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957161981258366 [2023-08-04 07:09:20,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-04 07:09:20,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-04 07:09:20,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:09:20,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-04 07:09:20,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:09:20,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:09:20,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:09:20,333 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 199 flow. Second operand 3 states and 445 transitions. [2023-08-04 07:09:20,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 556 flow Received shutdown request... [2023-08-04 07:10:55,370 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 07:10:56,391 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 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown