/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_thin002_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:33:47,036 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:33:47,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:33:47,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:33:47,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:33:47,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:33:47,106 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:33:47,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:33:47,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:33:47,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:33:47,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:33:47,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:33:47,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:33:47,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:33:47,151 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:33:47,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:33:47,151 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:33:47,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:33:47,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:33:47,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:33:47,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:33:47,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:33:47,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:33:47,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:33:47,153 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:33:47,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:33:47,154 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:33:47,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:33:47,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:33:47,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:33:47,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:33:47,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:33:47,156 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:33:47,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:33:47,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:33:47,157 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:33:47,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:33:47,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:33:47,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:33:47,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:33:47,378 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:33:47,378 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:33:47,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.opt_bound2.i [2023-08-04 07:33:48,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:33:48,803 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:33:48,804 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_power.opt_bound2.i [2023-08-04 07:33:48,844 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88eddad77/e25e5e20cbce4bc3b0f141c4eaecd397/FLAGd99880e38 [2023-08-04 07:33:49,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88eddad77/e25e5e20cbce4bc3b0f141c4eaecd397 [2023-08-04 07:33:49,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:33:49,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:33:49,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:33:49,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:33:49,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:33:49,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a58257d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49, skipping insertion in model container [2023-08-04 07:33:49,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,205 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:33:49,381 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_thin002_power.opt_bound2.i[951,964] [2023-08-04 07:33:49,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:33:49,615 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:33:49,628 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_thin002_power.opt_bound2.i[951,964] [2023-08-04 07:33:49,648 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:33:49,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:33:49,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:33:49,731 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:33:49,731 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:33:49,737 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:33:49,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49 WrapperNode [2023-08-04 07:33:49,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:33:49,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:33:49,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:33:49,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:33:49,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,784 INFO L138 Inliner]: procedures = 177, calls = 84, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 232 [2023-08-04 07:33:49,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:33:49,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:33:49,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:33:49,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:33:49,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:33:49,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:33:49,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:33:49,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:33:49,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (1/1) ... [2023-08-04 07:33:49,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:33:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:33:49,871 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 07:33:49,896 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 07:33:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:33:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:33:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:33:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:33:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:33:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:33:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:33:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:33:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:33:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:33:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:33:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:33:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:33:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:33:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:33:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:33:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:33:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:33:49,919 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 07:33:50,062 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:33:50,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:33:50,489 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:33:50,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:33:50,753 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:33:50,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:33:50 BoogieIcfgContainer [2023-08-04 07:33:50,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:33:50,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:33:50,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:33:50,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:33:50,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:33:49" (1/3) ... [2023-08-04 07:33:50,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f070e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:33:50, skipping insertion in model container [2023-08-04 07:33:50,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:33:49" (2/3) ... [2023-08-04 07:33:50,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f070e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:33:50, skipping insertion in model container [2023-08-04 07:33:50,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:33:50" (3/3) ... [2023-08-04 07:33:50,765 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_thin002_power.opt_bound2.i [2023-08-04 07:33:50,772 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:33:50,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:33:50,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:33:50,782 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:33:50,867 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:33:50,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 177 transitions, 374 flow [2023-08-04 07:33:51,146 INFO L124 PetriNetUnfolderBase]: 62/946 cut-off events. [2023-08-04 07:33:51,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:33:51,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 946 events. 62/946 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5682 event pairs, 0 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-04 07:33:51,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 177 transitions, 374 flow [2023-08-04 07:33:51,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 175 transitions, 366 flow [2023-08-04 07:33:51,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:33:51,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 175 transitions, 366 flow [2023-08-04 07:33:51,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 175 transitions, 366 flow [2023-08-04 07:33:51,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 175 transitions, 366 flow [2023-08-04 07:33:51,307 INFO L124 PetriNetUnfolderBase]: 62/943 cut-off events. [2023-08-04 07:33:51,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:33:51,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 943 events. 62/943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5651 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 569. Up to 32 conditions per place. [2023-08-04 07:33:51,326 INFO L119 LiptonReduction]: Number of co-enabled transitions 3862 [2023-08-04 07:33:58,516 INFO L134 LiptonReduction]: Checked pairs total: 10794 [2023-08-04 07:33:58,516 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-04 07:33:58,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:33:58,533 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;@4a810bd0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:33:58,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:33:58,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:33:58,540 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2023-08-04 07:33:58,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:33:58,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:33:58,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:33:58,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:33:58,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:33:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 629534644, now seen corresponding path program 1 times [2023-08-04 07:33:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:33:58,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369907908] [2023-08-04 07:33:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:33:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:33:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:33:58,874 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 07:33:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:33:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369907908] [2023-08-04 07:33:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369907908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:33:58,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:33:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:33:58,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372629099] [2023-08-04 07:33:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:33:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:33:58,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:33:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:33:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:33:58,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 328 [2023-08-04 07:33:58,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:33:58,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:33:58,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 328 [2023-08-04 07:33:58,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:00,966 INFO L124 PetriNetUnfolderBase]: 9406/13717 cut-off events. [2023-08-04 07:34:00,966 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-04 07:34:01,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27369 conditions, 13717 events. 9406/13717 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 83445 event pairs, 8080 based on Foata normal form. 420/11962 useless extension candidates. Maximal degree in co-relation 27355. Up to 13382 conditions per place. [2023-08-04 07:34:01,131 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 34 selfloop transitions, 2 changer transitions 1/42 dead transitions. [2023-08-04 07:34:01,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 174 flow [2023-08-04 07:34:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-04 07:34:01,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2023-08-04 07:34:01,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-04 07:34:01,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-04 07:34:01,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:01,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-04 07:34:01,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:01,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:01,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:01,160 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 96 flow. Second operand 3 states and 504 transitions. [2023-08-04 07:34:01,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 174 flow [2023-08-04 07:34:01,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:34:01,165 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 102 flow [2023-08-04 07:34:01,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-04 07:34:01,170 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-04 07:34:01,170 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 102 flow [2023-08-04 07:34:01,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:01,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:01,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:01,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:34:01,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:01,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1641851918, now seen corresponding path program 1 times [2023-08-04 07:34:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303511281] [2023-08-04 07:34:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:01,255 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 07:34:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:01,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303511281] [2023-08-04 07:34:01,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303511281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:01,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600939834] [2023-08-04 07:34:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:01,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:01,265 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 07:34:01,284 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 07:34:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:01,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:34:01,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:01,420 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 07:34:01,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:34:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600939834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:34:01,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:34:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457648138] [2023-08-04 07:34:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:01,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 328 [2023-08-04 07:34:01,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:01,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:01,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 328 [2023-08-04 07:34:01,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:02,784 INFO L124 PetriNetUnfolderBase]: 7556/10792 cut-off events. [2023-08-04 07:34:02,785 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:34:02,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21559 conditions, 10792 events. 7556/10792 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 62381 event pairs, 5566 based on Foata normal form. 0/9172 useless extension candidates. Maximal degree in co-relation 21542. Up to 10528 conditions per place. [2023-08-04 07:34:02,846 INFO L140 encePairwiseOnDemand]: 325/328 looper letters, 36 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 07:34:02,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 190 flow [2023-08-04 07:34:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-04 07:34:02,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132113821138211 [2023-08-04 07:34:02,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-04 07:34:02,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-04 07:34:02,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:02,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-04 07:34:02,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:02,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:02,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:02,854 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 505 transitions. [2023-08-04 07:34:02,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 190 flow [2023-08-04 07:34:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:34:02,855 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 106 flow [2023-08-04 07:34:02,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-04 07:34:02,856 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-04 07:34:02,857 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 106 flow [2023-08-04 07:34:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:02,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:02,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:02,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:34:03,059 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 07:34:03,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:03,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 313460904, now seen corresponding path program 1 times [2023-08-04 07:34:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000534941] [2023-08-04 07:34:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:03,140 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 07:34:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000534941] [2023-08-04 07:34:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000534941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352040828] [2023-08-04 07:34:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:03,142 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 07:34:03,162 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 07:34:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:03,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:34:03,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:03,294 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 07:34:03,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:34:03,317 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 07:34:03,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352040828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:34:03,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:34:03,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:34:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873199701] [2023-08-04 07:34:03,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:34:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:34:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:34:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:03,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 328 [2023-08-04 07:34:03,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 157.4) internal successors, (787), 5 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:03,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:03,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 328 [2023-08-04 07:34:03,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:03,356 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:34:03,356 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:34:03,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:34:03,356 INFO L140 encePairwiseOnDemand]: 325/328 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:34:03,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:34:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:34:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:34:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2023-08-04 07:34:03,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771341463414634 [2023-08-04 07:34:03,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2023-08-04 07:34:03,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2023-08-04 07:34:03,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:03,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2023-08-04 07:34:03,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:03,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:03,364 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:03,364 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 106 flow. Second operand 4 states and 626 transitions. [2023-08-04 07:34:03,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:34:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:34:03,364 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:34:03,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, 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=18, PETRI_TRANSITIONS=0} [2023-08-04 07:34:03,366 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -30 predicate places. [2023-08-04 07:34:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:34:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.4) internal successors, (787), 5 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:03,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:34:03,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:34:03,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:34:03,379 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 07:34:03,575 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 07:34:03,576 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 07:34:03,578 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:34:03,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 177 transitions, 374 flow [2023-08-04 07:34:03,688 INFO L124 PetriNetUnfolderBase]: 62/946 cut-off events. [2023-08-04 07:34:03,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:03,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 946 events. 62/946 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5682 event pairs, 0 based on Foata normal form. 0/834 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-08-04 07:34:03,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 177 transitions, 374 flow [2023-08-04 07:34:03,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 146 transitions, 312 flow [2023-08-04 07:34:03,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:34:03,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 146 transitions, 312 flow [2023-08-04 07:34:03,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 146 transitions, 312 flow [2023-08-04 07:34:03,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 146 transitions, 312 flow [2023-08-04 07:34:03,736 INFO L124 PetriNetUnfolderBase]: 14/450 cut-off events. [2023-08-04 07:34:03,737 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:03,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 450 events. 14/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1960 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-08-04 07:34:03,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 2224 [2023-08-04 07:34:09,983 INFO L134 LiptonReduction]: Checked pairs total: 5914 [2023-08-04 07:34:09,983 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 07:34:09,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:34:09,986 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;@4a810bd0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:34:09,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:34:09,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:34:09,990 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:34:09,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:09,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:09,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:34:09,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:34:09,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2037634508, now seen corresponding path program 1 times [2023-08-04 07:34:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506231728] [2023-08-04 07:34:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:34:10,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:34:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:34:10,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:34:10,061 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:34:10,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:34:10,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:34:10,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:34:10,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:34:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:34:10,062 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:34:10,063 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:34:10,063 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:34:10,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:34:10,111 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:34:10,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 208 transitions, 464 flow [2023-08-04 07:34:10,589 INFO L124 PetriNetUnfolderBase]: 282/4300 cut-off events. [2023-08-04 07:34:10,589 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:34:10,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 4300 events. 282/4300 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41422 event pairs, 0 based on Foata normal form. 0/3799 useless extension candidates. Maximal degree in co-relation 3122. Up to 162 conditions per place. [2023-08-04 07:34:10,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 208 transitions, 464 flow [2023-08-04 07:34:10,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 206 transitions, 452 flow [2023-08-04 07:34:10,619 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:34:10,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 206 transitions, 452 flow [2023-08-04 07:34:10,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 206 transitions, 452 flow [2023-08-04 07:34:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 206 transitions, 452 flow [2023-08-04 07:34:11,075 INFO L124 PetriNetUnfolderBase]: 282/4296 cut-off events. [2023-08-04 07:34:11,076 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-04 07:34:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 4296 events. 282/4296 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41293 event pairs, 0 based on Foata normal form. 0/3795 useless extension candidates. Maximal degree in co-relation 3110. Up to 162 conditions per place. [2023-08-04 07:34:11,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 9388 [2023-08-04 07:34:19,461 INFO L134 LiptonReduction]: Checked pairs total: 29128 [2023-08-04 07:34:19,462 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-04 07:34:19,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:34:19,464 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;@4a810bd0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:34:19,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:34:19,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:34:19,469 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2023-08-04 07:34:19,469 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:34:19,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:19,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:19,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:34:19,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1546477896, now seen corresponding path program 1 times [2023-08-04 07:34:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:19,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720292763] [2023-08-04 07:34:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:19,504 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 07:34:19,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:19,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720292763] [2023-08-04 07:34:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720292763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:19,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:34:19,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:34:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48772010] [2023-08-04 07:34:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:19,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:19,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:34:19,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 367 [2023-08-04 07:34:19,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:19,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:19,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 367 [2023-08-04 07:34:19,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand