/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_mix036_power.opt_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:01:33,542 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:01:33,608 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:01:33,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:01:33,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:01:33,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:01:33,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:01:33,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:01:33,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:01:33,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:01:33,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:01:33,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:01:33,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:01:33,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:01:33,653 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:01:33,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:01:33,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:01:33,654 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:01:33,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:01:33,654 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:01:33,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:01:33,655 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:01:33,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:01:33,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:01:33,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:01:33,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:01:33,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:01:33,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:01:33,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:01:33,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:01:33,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:01:33,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:01:33,658 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:01:33,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:01:33,659 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:01:33,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:01:33,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:01:33,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:01:33,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:01:33,918 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:01:33,919 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:01:33,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix036_power.opt_rmo.opt_bound2.i [2023-08-04 06:01:35,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:01:35,468 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:01:35,469 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix036_power.opt_rmo.opt_bound2.i [2023-08-04 06:01:35,488 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0671c1e9b/d256ac0358d24609885ae9d52a6d43ac/FLAGf4ea568b8 [2023-08-04 06:01:35,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0671c1e9b/d256ac0358d24609885ae9d52a6d43ac [2023-08-04 06:01:35,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:01:35,509 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:01:35,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:01:35,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:01:35,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:01:35,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:01:35" (1/1) ... [2023-08-04 06:01:35,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4292d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:35, skipping insertion in model container [2023-08-04 06:01:35,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:01:35" (1/1) ... [2023-08-04 06:01:35,569 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:01:35,715 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_mix036_power.opt_rmo.opt_bound2.i[958,971] [2023-08-04 06:01:35,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:01:35,886 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:01:35,898 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_mix036_power.opt_rmo.opt_bound2.i[958,971] [2023-08-04 06:01:35,918 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:01:35,928 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:01:35,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:01:36,010 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:01:36,010 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:01:36,019 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:01:36,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36 WrapperNode [2023-08-04 06:01:36,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:01:36,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:01:36,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:01:36,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:01:36,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,112 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 179 [2023-08-04 06:01:36,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:01:36,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:01:36,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:01:36,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:01:36,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:01:36,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:01:36,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:01:36,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:01:36,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (1/1) ... [2023-08-04 06:01:36,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:01:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:01:36,216 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 06:01:36,236 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 06:01:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:01:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:01:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:01:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:01:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:01:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:01:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:01:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:01:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:01:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:01:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:01:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 06:01:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 06:01:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:01:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:01:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:01:36,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:01:36,264 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 06:01:36,390 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:01:36,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:01:36,882 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:01:36,978 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:01:36,978 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 06:01:36,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:01:36 BoogieIcfgContainer [2023-08-04 06:01:36,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:01:36,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:01:36,987 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:01:36,990 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:01:36,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:01:35" (1/3) ... [2023-08-04 06:01:36,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420e7231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:01:36, skipping insertion in model container [2023-08-04 06:01:36,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:01:36" (2/3) ... [2023-08-04 06:01:36,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420e7231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:01:36, skipping insertion in model container [2023-08-04 06:01:36,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:01:36" (3/3) ... [2023-08-04 06:01:36,993 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix036_power.opt_rmo.opt_bound2.i [2023-08-04 06:01:37,000 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:01:37,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:01:37,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:01:37,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:01:37,074 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:01:37,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 160 transitions, 340 flow [2023-08-04 06:01:37,367 INFO L124 PetriNetUnfolderBase]: 62/943 cut-off events. [2023-08-04 06:01:37,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:37,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 943 events. 62/943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5844 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 556. Up to 32 conditions per place. [2023-08-04 06:01:37,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 160 transitions, 340 flow [2023-08-04 06:01:37,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 158 transitions, 332 flow [2023-08-04 06:01:37,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:01:37,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 158 transitions, 332 flow [2023-08-04 06:01:37,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 158 transitions, 332 flow [2023-08-04 06:01:37,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 158 transitions, 332 flow [2023-08-04 06:01:37,536 INFO L124 PetriNetUnfolderBase]: 62/940 cut-off events. [2023-08-04 06:01:37,536 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:37,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 940 events. 62/940 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5823 event pairs, 0 based on Foata normal form. 0/828 useless extension candidates. Maximal degree in co-relation 550. Up to 32 conditions per place. [2023-08-04 06:01:37,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 4106 [2023-08-04 06:01:41,532 INFO L134 LiptonReduction]: Checked pairs total: 9815 [2023-08-04 06:01:41,532 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-04 06:01:41,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:01:41,550 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;@1c8cac8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:01:41,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:01:41,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:01:41,555 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 06:01:41,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:41,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:01:41,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:01:41,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:01:41,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:01:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2066197652, now seen corresponding path program 1 times [2023-08-04 06:01:41,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:01:41,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830275830] [2023-08-04 06:01:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:01:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:41,830 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 06:01:41,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:01:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830275830] [2023-08-04 06:01:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830275830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:01:41,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:01:41,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:01:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127051354] [2023-08-04 06:01:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:01:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:01:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:01:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:01:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:01:41,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 293 [2023-08-04 06:01:41,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:41,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:01:41,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 293 [2023-08-04 06:01:41,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:01:43,818 INFO L124 PetriNetUnfolderBase]: 12595/18454 cut-off events. [2023-08-04 06:01:43,818 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 06:01:43,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36447 conditions, 18454 events. 12595/18454 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 115045 event pairs, 10903 based on Foata normal form. 540/16414 useless extension candidates. Maximal degree in co-relation 36433. Up to 17669 conditions per place. [2023-08-04 06:01:43,934 INFO L140 encePairwiseOnDemand]: 289/293 looper letters, 35 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 06:01:43,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 178 flow [2023-08-04 06:01:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:01:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:01:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 06:01:43,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199089874857793 [2023-08-04 06:01:43,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 06:01:43,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 06:01:43,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:01:43,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 06:01:43,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 06:01:43,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:43,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:43,962 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 98 flow. Second operand 3 states and 457 transitions. [2023-08-04 06:01:43,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 178 flow [2023-08-04 06:01:43,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:01:43,966 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 104 flow [2023-08-04 06:01:43,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-04 06:01:43,970 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 06:01:43,971 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 104 flow [2023-08-04 06:01:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:43,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:01:43,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:01:43,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:01:43,972 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:01:43,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:01:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1907653046, now seen corresponding path program 1 times [2023-08-04 06:01:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:01:43,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917177668] [2023-08-04 06:01:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:01:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:44,080 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 06:01:44,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:01:44,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917177668] [2023-08-04 06:01:44,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917177668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:01:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470538293] [2023-08-04 06:01:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:44,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:01:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:01:44,089 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 06:01:44,119 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 06:01:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:44,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:01:44,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:01:44,228 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 06:01:44,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:01:44,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470538293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:01:44,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:01:44,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:01:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151670801] [2023-08-04 06:01:44,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:01:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:01:44,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:01:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:01:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:01:44,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 293 [2023-08-04 06:01:44,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:44,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:01:44,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 293 [2023-08-04 06:01:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:01:45,923 INFO L124 PetriNetUnfolderBase]: 10689/15425 cut-off events. [2023-08-04 06:01:45,924 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 06:01:45,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30489 conditions, 15425 events. 10689/15425 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 91264 event pairs, 7644 based on Foata normal form. 0/13361 useless extension candidates. Maximal degree in co-relation 30472. Up to 14733 conditions per place. [2023-08-04 06:01:46,005 INFO L140 encePairwiseOnDemand]: 290/293 looper letters, 38 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 06:01:46,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 198 flow [2023-08-04 06:01:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:01:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:01:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-04 06:01:46,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221843003412969 [2023-08-04 06:01:46,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-04 06:01:46,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-04 06:01:46,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:01:46,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-04 06:01:46,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,020 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 104 flow. Second operand 3 states and 459 transitions. [2023-08-04 06:01:46,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 198 flow [2023-08-04 06:01:46,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:01:46,022 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 108 flow [2023-08-04 06:01:46,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-04 06:01:46,023 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-04 06:01:46,023 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 108 flow [2023-08-04 06:01:46,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:01:46,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:01:46,037 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 06:01:46,230 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 06:01:46,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:01:46,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:01:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -119795525, now seen corresponding path program 1 times [2023-08-04 06:01:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:01:46,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031251162] [2023-08-04 06:01:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:46,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:01:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:46,339 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 06:01:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:01:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031251162] [2023-08-04 06:01:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031251162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:01:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975749324] [2023-08-04 06:01:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:46,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:01:46,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:01:46,342 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 06:01:46,348 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 06:01:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:46,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:01:46,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:01:46,462 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 06:01:46,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:01:46,481 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 06:01:46,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975749324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:01:46,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:01:46,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:01:46,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994308082] [2023-08-04 06:01:46,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:01:46,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:01:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:01:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:01:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:01:46,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 293 [2023-08-04 06:01:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:01:46,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 293 [2023-08-04 06:01:46,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:01:46,521 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:01:46,521 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 06:01:46,521 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 4. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:01:46,522 INFO L140 encePairwiseOnDemand]: 290/293 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:01:46,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:01:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:01:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:01:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-04 06:01:46,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47952218430034127 [2023-08-04 06:01:46,524 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-04 06:01:46,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-04 06:01:46,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:01:46,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-04 06:01:46,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 293.0) internal successors, (1465), 5 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,529 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 108 flow. Second operand 4 states and 562 transitions. [2023-08-04 06:01:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:01:46,529 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 06:01:46,530 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:01:46,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, 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 06:01:46,530 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -31 predicate places. [2023-08-04 06:01:46,531 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:01:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:46,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:01:46,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:01:46,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:01:46,543 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 06:01:46,740 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 06:01:46,741 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 06:01:46,743 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:01:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 160 transitions, 340 flow [2023-08-04 06:01:46,817 INFO L124 PetriNetUnfolderBase]: 62/943 cut-off events. [2023-08-04 06:01:46,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:46,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 943 events. 62/943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5844 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 556. Up to 32 conditions per place. [2023-08-04 06:01:46,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 160 transitions, 340 flow [2023-08-04 06:01:46,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 129 transitions, 278 flow [2023-08-04 06:01:46,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:01:46,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 129 transitions, 278 flow [2023-08-04 06:01:46,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 129 transitions, 278 flow [2023-08-04 06:01:46,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 129 transitions, 278 flow [2023-08-04 06:01:46,854 INFO L124 PetriNetUnfolderBase]: 14/447 cut-off events. [2023-08-04 06:01:46,854 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:46,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 447 events. 14/447 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2066 event pairs, 0 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 308. Up to 16 conditions per place. [2023-08-04 06:01:46,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 2344 [2023-08-04 06:01:50,164 INFO L134 LiptonReduction]: Checked pairs total: 4748 [2023-08-04 06:01:50,165 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 06:01:50,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:01:50,167 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;@1c8cac8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:01:50,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:01:50,171 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:01:50,172 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 06:01:50,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:01:50,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:01:50,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:01:50,172 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 06:01:50,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:01:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 950635991, now seen corresponding path program 1 times [2023-08-04 06:01:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:01:50,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064683898] [2023-08-04 06:01:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:01:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:01:50,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:01:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:01:50,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:01:50,236 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:01:50,236 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 06:01:50,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 06:01:50,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 06:01:50,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 06:01:50,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 06:01:50,237 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:01:50,237 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:01:50,238 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:01:50,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:01:50,278 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:01:50,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 193 transitions, 434 flow [2023-08-04 06:01:50,872 INFO L124 PetriNetUnfolderBase]: 282/4389 cut-off events. [2023-08-04 06:01:50,872 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 06:01:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4678 conditions, 4389 events. 282/4389 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 42906 event pairs, 0 based on Foata normal form. 0/3888 useless extension candidates. Maximal degree in co-relation 3157. Up to 162 conditions per place. [2023-08-04 06:01:50,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 193 transitions, 434 flow [2023-08-04 06:01:50,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 191 transitions, 422 flow [2023-08-04 06:01:50,917 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:01:50,917 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 191 transitions, 422 flow [2023-08-04 06:01:50,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 191 transitions, 422 flow [2023-08-04 06:01:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 191 transitions, 422 flow [2023-08-04 06:01:51,370 INFO L124 PetriNetUnfolderBase]: 282/4385 cut-off events. [2023-08-04 06:01:51,370 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-04 06:01:51,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4666 conditions, 4385 events. 282/4385 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 42863 event pairs, 0 based on Foata normal form. 0/3884 useless extension candidates. Maximal degree in co-relation 3145. Up to 162 conditions per place. [2023-08-04 06:01:51,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 10104 [2023-08-04 06:01:55,155 INFO L134 LiptonReduction]: Checked pairs total: 32569 [2023-08-04 06:01:55,155 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-04 06:01:55,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:01:55,158 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;@1c8cac8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:01:55,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:01:55,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:01:55,162 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 06:01:55,162 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:01:55,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:01:55,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:01:55,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:01:55,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:01:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1046882374, now seen corresponding path program 1 times [2023-08-04 06:01:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:01:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486189923] [2023-08-04 06:01:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:01:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:01:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:01:55,214 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 06:01:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:01:55,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486189923] [2023-08-04 06:01:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486189923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:01:55,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:01:55,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:01:55,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35450656] [2023-08-04 06:01:55,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:01:55,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:01:55,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:01:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:01:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:01:55,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 335 [2023-08-04 06:01:55,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:01:55,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:01:55,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 335 [2023-08-04 06:01:55,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand