/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_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:00:00,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:00:00,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:00:00,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:00:00,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:00:00,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:00:00,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:00:00,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:00:00,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:00:00,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:00:00,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:00:00,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:00:00,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:00:00,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:00:00,426 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:00:00,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:00:00,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:00:00,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:00:00,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:00:00,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:00:00,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:00:00,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:00:00,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:00:00,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:00:00,430 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:00:00,430 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:00:00,430 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:00:00,431 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:00:00,431 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:00:00,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:00:00,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:00:00,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:00:00,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:00:00,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:00:00,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:00:00,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:00:00,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:00:00,433 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:00:00,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:00:00,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:00:00,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:00:00,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:00:00,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:00:00,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:00:00,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:00:00,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:00:00,675 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:00:00,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 07:00:01,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:00:02,078 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:00:02,079 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 07:00:02,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7e9497f/58a97a43ae9844cca7a7642d5de56ed6/FLAGf3af5ad0c [2023-08-04 07:00:02,104 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7e9497f/58a97a43ae9844cca7a7642d5de56ed6 [2023-08-04 07:00:02,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:00:02,108 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:00:02,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:00:02,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:00:02,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:00:02,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482c3623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02, skipping insertion in model container [2023-08-04 07:00:02,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,163 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:00:02,294 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_power.oepc_bound2.i[995,1008] [2023-08-04 07:00:02,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:00:02,538 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:00:02,548 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_power.oepc_bound2.i[995,1008] [2023-08-04 07:00:02,563 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:00:02,565 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:00:02,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:00:02,637 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:00:02,637 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:00:02,643 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:00:02,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02 WrapperNode [2023-08-04 07:00:02,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:00:02,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:00:02,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:00:02,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:00:02,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,665 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,689 INFO L138 Inliner]: procedures = 177, calls = 87, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 220 [2023-08-04 07:00:02,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:00:02,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:00:02,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:00:02,691 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:00:02,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,703 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,703 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:00:02,735 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:00:02,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:00:02,736 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:00:02,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (1/1) ... [2023-08-04 07:00:02,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:00:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:02,776 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 07:00:02,786 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 07:00:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:00:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:00:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:00:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:00:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:00:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:00:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:00:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:00:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:00:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:00:02,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:00:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:00:02,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:00:02,815 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 07:00:02,987 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:00:02,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:00:03,424 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:00:03,704 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:00:03,704 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:00:03,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:00:03 BoogieIcfgContainer [2023-08-04 07:00:03,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:00:03,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:00:03,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:00:03,714 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:00:03,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:00:02" (1/3) ... [2023-08-04 07:00:03,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0bcb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:00:03, skipping insertion in model container [2023-08-04 07:00:03,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:00:02" (2/3) ... [2023-08-04 07:00:03,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0bcb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:00:03, skipping insertion in model container [2023-08-04 07:00:03,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:00:03" (3/3) ... [2023-08-04 07:00:03,717 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_power.oepc_bound2.i [2023-08-04 07:00:03,725 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:00:03,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:00:03,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:00:03,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:00:03,809 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:00:03,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 07:00:04,115 INFO L124 PetriNetUnfolderBase]: 62/928 cut-off events. [2023-08-04 07:00:04,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:04,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 928 events. 62/928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5547 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 565. Up to 32 conditions per place. [2023-08-04 07:00:04,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 07:00:04,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 152 transitions, 316 flow [2023-08-04 07:00:04,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:00:04,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 152 transitions, 316 flow [2023-08-04 07:00:04,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 152 transitions, 316 flow [2023-08-04 07:00:04,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 152 transitions, 316 flow [2023-08-04 07:00:04,247 INFO L124 PetriNetUnfolderBase]: 46/689 cut-off events. [2023-08-04 07:00:04,248 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:04,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 689 events. 46/689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3671 event pairs, 0 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 439. Up to 32 conditions per place. [2023-08-04 07:00:04,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 2658 [2023-08-04 07:00:13,287 INFO L134 LiptonReduction]: Checked pairs total: 5420 [2023-08-04 07:00:13,288 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 07:00:13,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:00:13,303 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;@9d5f81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:00:13,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:00:13,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:00:13,309 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2023-08-04 07:00:13,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:13,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:13,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:13,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:13,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1534639172, now seen corresponding path program 1 times [2023-08-04 07:00:13,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:13,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859072236] [2023-08-04 07:00:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:13,577 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 07:00:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859072236] [2023-08-04 07:00:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859072236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:13,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:00:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:00:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486016126] [2023-08-04 07:00:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:13,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:13,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:00:13,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 297 [2023-08-04 07:00:13,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:13,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:13,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 297 [2023-08-04 07:00:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:14,948 INFO L124 PetriNetUnfolderBase]: 4280/6242 cut-off events. [2023-08-04 07:00:14,948 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 07:00:14,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12632 conditions, 6242 events. 4280/6242 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33772 event pairs, 3630 based on Foata normal form. 0/5855 useless extension candidates. Maximal degree in co-relation 12618. Up to 6228 conditions per place. [2023-08-04 07:00:14,989 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 29 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-04 07:00:14,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 144 flow [2023-08-04 07:00:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:00:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:00:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-04 07:00:15,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420875420875421 [2023-08-04 07:00:15,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-04 07:00:15,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-04 07:00:15,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:15,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-04 07:00:15,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:15,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:15,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:15,029 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 74 flow. Second operand 3 states and 483 transitions. [2023-08-04 07:00:15,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 144 flow [2023-08-04 07:00:15,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:00:15,033 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 82 flow [2023-08-04 07:00:15,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-04 07:00:15,038 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-04 07:00:15,038 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 82 flow [2023-08-04 07:00:15,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:15,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:15,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:15,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:00:15,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:15,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash 604515611, now seen corresponding path program 1 times [2023-08-04 07:00:15,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:15,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115437150] [2023-08-04 07:00:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:15,233 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 07:00:15,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115437150] [2023-08-04 07:00:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115437150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:00:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152604624] [2023-08-04 07:00:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:15,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:15,238 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 07:00:15,251 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 07:00:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:15,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:00:15,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:00:15,436 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 07:00:15,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:00:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152604624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:15,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:00:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-04 07:00:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486230814] [2023-08-04 07:00:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:00:15,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 297 [2023-08-04 07:00:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 297 [2023-08-04 07:00:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:16,731 INFO L124 PetriNetUnfolderBase]: 5653/8159 cut-off events. [2023-08-04 07:00:16,732 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 07:00:16,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16537 conditions, 8159 events. 5653/8159 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 44565 event pairs, 1351 based on Foata normal form. 100/7758 useless extension candidates. Maximal degree in co-relation 16520. Up to 6775 conditions per place. [2023-08-04 07:00:16,774 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 51 selfloop transitions, 3 changer transitions 1/56 dead transitions. [2023-08-04 07:00:16,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2023-08-04 07:00:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:00:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:00:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-04 07:00:16,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5712682379349046 [2023-08-04 07:00:16,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-04 07:00:16,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-04 07:00:16,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:16,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-04 07:00:16,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:16,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:16,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:16,781 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 82 flow. Second operand 3 states and 509 transitions. [2023-08-04 07:00:16,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2023-08-04 07:00:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:00:16,783 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 97 flow [2023-08-04 07:00:16,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-04 07:00:16,784 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-04 07:00:16,784 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 97 flow [2023-08-04 07:00:16,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:16,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:16,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:16,796 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 07:00:16,991 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 07:00:16,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:16,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:16,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1965915468, now seen corresponding path program 1 times [2023-08-04 07:00:16,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:16,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838323204] [2023-08-04 07:00:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:17,119 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 07:00:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838323204] [2023-08-04 07:00:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838323204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:00:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697841074] [2023-08-04 07:00:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:17,122 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 07:00:17,124 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 07:00:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:17,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:00:17,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:00:17,285 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 07:00:17,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:00:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697841074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:17,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:00:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:00:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234163183] [2023-08-04 07:00:17,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:17,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:00:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 297 [2023-08-04 07:00:17,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:17,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:17,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 297 [2023-08-04 07:00:17,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:18,077 INFO L124 PetriNetUnfolderBase]: 4036/5822 cut-off events. [2023-08-04 07:00:18,078 INFO L125 PetriNetUnfolderBase]: For 711/711 co-relation queries the response was YES. [2023-08-04 07:00:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12912 conditions, 5822 events. 4036/5822 cut-off events. For 711/711 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 29335 event pairs, 2763 based on Foata normal form. 0/5469 useless extension candidates. Maximal degree in co-relation 12894. Up to 5759 conditions per place. [2023-08-04 07:00:18,109 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 34 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 07:00:18,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 186 flow [2023-08-04 07:00:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:00:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:00:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-04 07:00:18,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443322109988776 [2023-08-04 07:00:18,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-04 07:00:18,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-04 07:00:18,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:18,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-04 07:00:18,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:18,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:18,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:18,115 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 97 flow. Second operand 3 states and 485 transitions. [2023-08-04 07:00:18,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 186 flow [2023-08-04 07:00:18,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:00:18,118 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 102 flow [2023-08-04 07:00:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-04 07:00:18,118 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-04 07:00:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 102 flow [2023-08-04 07:00:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:18,127 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 07:00:18,324 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 07:00:18,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:18,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash 527023344, now seen corresponding path program 1 times [2023-08-04 07:00:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:18,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156799460] [2023-08-04 07:00:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:18,389 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 07:00:18,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:18,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156799460] [2023-08-04 07:00:18,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156799460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:00:18,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383803593] [2023-08-04 07:00:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:18,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:18,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:18,391 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 07:00:18,412 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 07:00:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:18,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:00:18,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:00:18,548 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 07:00:18,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:00:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383803593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:18,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:00:18,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:00:18,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606291497] [2023-08-04 07:00:18,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:18,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:00:18,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 297 [2023-08-04 07:00:18,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:18,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:18,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 297 [2023-08-04 07:00:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:19,206 INFO L124 PetriNetUnfolderBase]: 3483/4955 cut-off events. [2023-08-04 07:00:19,206 INFO L125 PetriNetUnfolderBase]: For 561/561 co-relation queries the response was YES. [2023-08-04 07:00:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10762 conditions, 4955 events. 3483/4955 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24088 event pairs, 2366 based on Foata normal form. 0/4690 useless extension candidates. Maximal degree in co-relation 10743. Up to 4769 conditions per place. [2023-08-04 07:00:19,267 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 37 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 07:00:19,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 202 flow [2023-08-04 07:00:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:00:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:00:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-04 07:00:19,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547699214365881 [2023-08-04 07:00:19,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-04 07:00:19,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-04 07:00:19,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:19,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-04 07:00:19,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:19,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:19,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:19,274 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 102 flow. Second operand 3 states and 488 transitions. [2023-08-04 07:00:19,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 202 flow [2023-08-04 07:00:19,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:00:19,276 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 106 flow [2023-08-04 07:00:19,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-04 07:00:19,277 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2023-08-04 07:00:19,278 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 106 flow [2023-08-04 07:00:19,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:19,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:19,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:19,287 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 07:00:19,483 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 07:00:19,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:19,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1535777389, now seen corresponding path program 1 times [2023-08-04 07:00:19,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:19,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643832967] [2023-08-04 07:00:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:19,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:19,553 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 07:00:19,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:19,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643832967] [2023-08-04 07:00:19,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643832967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:00:19,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958719248] [2023-08-04 07:00:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:19,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:19,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:19,555 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 07:00:19,558 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 07:00:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:19,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:00:19,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:00:19,717 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 07:00:19,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:00:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958719248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:00:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:00:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329457037] [2023-08-04 07:00:19,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:00:19,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 297 [2023-08-04 07:00:19,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:19,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:19,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 297 [2023-08-04 07:00:19,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:20,330 INFO L124 PetriNetUnfolderBase]: 3239/4583 cut-off events. [2023-08-04 07:00:20,330 INFO L125 PetriNetUnfolderBase]: For 501/501 co-relation queries the response was YES. [2023-08-04 07:00:20,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10068 conditions, 4583 events. 3239/4583 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21605 event pairs, 2024 based on Foata normal form. 0/4395 useless extension candidates. Maximal degree in co-relation 10048. Up to 3741 conditions per place. [2023-08-04 07:00:20,352 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 07:00:20,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 218 flow [2023-08-04 07:00:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:00:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:00:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-04 07:00:20,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510662177328844 [2023-08-04 07:00:20,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-04 07:00:20,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-04 07:00:20,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:20,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-04 07:00:20,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,375 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 106 flow. Second operand 3 states and 491 transitions. [2023-08-04 07:00:20,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 218 flow [2023-08-04 07:00:20,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:00:20,379 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 110 flow [2023-08-04 07:00:20,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-04 07:00:20,382 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 07:00:20,382 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 110 flow [2023-08-04 07:00:20,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:20,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:20,389 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 07:00:20,589 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 07:00:20,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:20,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1402841174, now seen corresponding path program 1 times [2023-08-04 07:00:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590295489] [2023-08-04 07:00:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:20,668 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 07:00:20,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:20,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590295489] [2023-08-04 07:00:20,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590295489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:00:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514495309] [2023-08-04 07:00:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:20,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:20,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:00:20,675 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 07:00:20,676 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 07:00:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:20,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:00:20,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:00:20,872 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 07:00:20,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:00:20,895 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 07:00:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514495309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:00:20,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:00:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:00:20,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612666488] [2023-08-04 07:00:20,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:00:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:00:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:00:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:00:20,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 297 [2023-08-04 07:00:20,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:20,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 297 [2023-08-04 07:00:20,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:00:20,939 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:00:20,939 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:00:20,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 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 38. Up to 10 conditions per place. [2023-08-04 07:00:20,940 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:00:20,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 10 transitions, 47 flow [2023-08-04 07:00:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:00:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:00:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 606 transitions. [2023-08-04 07:00:20,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-08-04 07:00:20,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 606 transitions. [2023-08-04 07:00:20,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 606 transitions. [2023-08-04 07:00:20,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:00:20,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 606 transitions. [2023-08-04 07:00:20,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,946 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 110 flow. Second operand 4 states and 606 transitions. [2023-08-04 07:00:20,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 10 transitions, 47 flow [2023-08-04 07:00:20,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:00:20,947 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:00:20,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, 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 07:00:20,948 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -20 predicate places. [2023-08-04 07:00:20,948 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:00:20,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:20,951 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:00:20,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:00:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:00:21,157 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 07:00:21,158 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:00:21,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 07:00:21,245 INFO L124 PetriNetUnfolderBase]: 62/928 cut-off events. [2023-08-04 07:00:21,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:21,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 928 events. 62/928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5547 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 565. Up to 32 conditions per place. [2023-08-04 07:00:21,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 170 transitions, 360 flow [2023-08-04 07:00:21,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 139 transitions, 298 flow [2023-08-04 07:00:21,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:00:21,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 139 transitions, 298 flow [2023-08-04 07:00:21,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 139 transitions, 298 flow [2023-08-04 07:00:21,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 139 transitions, 298 flow [2023-08-04 07:00:21,281 INFO L124 PetriNetUnfolderBase]: 14/432 cut-off events. [2023-08-04 07:00:21,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:21,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 432 events. 14/432 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1836 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 317. Up to 16 conditions per place. [2023-08-04 07:00:21,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-04 07:00:27,244 INFO L134 LiptonReduction]: Checked pairs total: 4835 [2023-08-04 07:00:27,244 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 07:00:27,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:00:27,248 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;@9d5f81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:00:27,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:00:27,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:00:27,251 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 07:00:27,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:00:27,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:27,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:00:27,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:00:27,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1852099542, now seen corresponding path program 1 times [2023-08-04 07:00:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324296666] [2023-08-04 07:00:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:00:27,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:00:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:00:27,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:00:27,302 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:00:27,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:00:27,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:00:27,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:00:27,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:00:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:00:27,303 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:00:27,304 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:00:27,304 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:00:27,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:00:27,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:00:27,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:00:27,780 INFO L124 PetriNetUnfolderBase]: 282/4218 cut-off events. [2023-08-04 07:00:27,780 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:00:27,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 4218 events. 282/4218 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40247 event pairs, 0 based on Foata normal form. 0/3735 useless extension candidates. Maximal degree in co-relation 3067. Up to 162 conditions per place. [2023-08-04 07:00:27,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:00:27,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 180 transitions, 392 flow [2023-08-04 07:00:27,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:00:27,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:00:27,801 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:00:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 180 transitions, 392 flow [2023-08-04 07:00:28,210 INFO L124 PetriNetUnfolderBase]: 201/3044 cut-off events. [2023-08-04 07:00:28,211 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:00:28,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 3044 events. 201/3044 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 26764 event pairs, 0 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 2272. Up to 162 conditions per place. [2023-08-04 07:00:28,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 6656 [2023-08-04 07:00:38,625 INFO L134 LiptonReduction]: Checked pairs total: 17945 [2023-08-04 07:00:38,625 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-04 07:00:38,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:00:38,627 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;@9d5f81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:00:38,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:00:38,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:00:38,632 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2023-08-04 07:00:38,632 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:00:38,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:00:38,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:00:38,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:00:38,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:00:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1020557744, now seen corresponding path program 1 times [2023-08-04 07:00:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:00:38,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028039215] [2023-08-04 07:00:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:00:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:00:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:00:38,670 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 07:00:38,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:00:38,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028039215] [2023-08-04 07:00:38,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028039215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:00:38,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:00:38,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:00:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891411053] [2023-08-04 07:00:38,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:00:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:00:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:00:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:00:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:00:38,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 333 [2023-08-04 07:00:38,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:00:38,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:00:38,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 333 [2023-08-04 07:00:38,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand