/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:58:46,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:58:46,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:58:46,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:58:46,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:58:46,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:58:46,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:58:46,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:58:46,537 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:58:46,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:58:46,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:58:46,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:58:46,541 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:58:46,542 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:58:46,542 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:58:46,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:58:46,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:58:46,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:58:46,544 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:58:46,544 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:58:46,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:58:46,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:58:46,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:58:46,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:58:46,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:58:46,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:58:46,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:58:46,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:58:46,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:58:46,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:58:46,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:58:46,547 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:58:46,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:58:46,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:58:46,547 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:58:46,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:58:46,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:58:46,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:58:46,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:58:46,709 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:58:46,709 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:58:46,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i [2023-08-03 16:58:47,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:58:47,808 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:58:47,808 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i [2023-08-03 16:58:47,823 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860f0e157/40c059cc35054576a729db599f41989d/FLAGbcb0c8df2 [2023-08-03 16:58:47,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860f0e157/40c059cc35054576a729db599f41989d [2023-08-03 16:58:47,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:58:47,840 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:58:47,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:58:47,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:58:47,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:58:47,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:58:47" (1/1) ... [2023-08-03 16:58:47,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff3cd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:47, skipping insertion in model container [2023-08-03 16:58:47,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:58:47" (1/1) ... [2023-08-03 16:58:47,888 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:58:48,001 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_mix004.oepc_bound2.i[945,958] [2023-08-03 16:58:48,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:58:48,168 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:58:48,176 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_mix004.oepc_bound2.i[945,958] [2023-08-03 16:58:48,193 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:58:48,194 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:58:48,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:58:48,241 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:58:48,242 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:58:48,246 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:58:48,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48 WrapperNode [2023-08-03 16:58:48,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:58:48,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:58:48,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:58:48,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:58:48,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,282 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 179 [2023-08-03 16:58:48,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:58:48,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:58:48,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:58:48,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:58:48,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:58:48,311 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:58:48,311 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:58:48,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:58:48,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (1/1) ... [2023-08-03 16:58:48,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:58:48,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:58:48,345 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) [2023-08-03 16:58:48,354 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 [2023-08-03 16:58:48,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:58:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 16:58:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:58:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:58:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:58:48,370 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 16:58:48,370 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 16:58:48,370 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 16:58:48,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 16:58:48,371 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 16:58:48,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 16:58:48,371 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 16:58:48,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 16:58:48,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:58:48,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 16:58:48,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:58:48,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:58:48,372 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 16:58:48,460 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:58:48,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:58:48,730 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:58:48,819 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:58:48,820 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 16:58:48,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:58:48 BoogieIcfgContainer [2023-08-03 16:58:48,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:58:48,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:58:48,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:58:48,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:58:48,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:58:47" (1/3) ... [2023-08-03 16:58:48,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d301794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:58:48, skipping insertion in model container [2023-08-03 16:58:48,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:58:48" (2/3) ... [2023-08-03 16:58:48,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d301794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:58:48, skipping insertion in model container [2023-08-03 16:58:48,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:58:48" (3/3) ... [2023-08-03 16:58:48,828 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix004.oepc_bound2.i [2023-08-03 16:58:48,833 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:58:48,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:58:48,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 16:58:48,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:58:48,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:58:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,075 INFO L124 PetriNetUnfolderBase]: 62/939 cut-off events. [2023-08-03 16:58:49,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:58:49,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 939 events. 62/939 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5833 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-03 16:58:49,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:58:49,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 162 transitions, 344 flow [2023-08-03 16:58:49,172 INFO L124 PetriNetUnfolderBase]: 62/939 cut-off events. [2023-08-03 16:58:49,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:58:49,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 939 events. 62/939 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5833 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-03 16:58:49,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 4642 [2023-08-03 16:58:52,268 INFO L134 LiptonReduction]: Checked pairs total: 13405 [2023-08-03 16:58:52,268 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-03 16:58:52,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:58:52,280 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;@4569ad8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:58:52,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 16:58:52,282 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:58:52,282 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-03 16:58:52,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:58:52,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:58:52,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 16:58:52,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:58:52,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:58:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash 20954862, now seen corresponding path program 1 times [2023-08-03 16:58:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:58:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890964761] [2023-08-03 16:58:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:58:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:58:52,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:58:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890964761] [2023-08-03 16:58:52,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890964761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:58:52,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:58:52,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:58:52,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977861056] [2023-08-03 16:58:52,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:58:52,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:58:52,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:58:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:58:52,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:58:52,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 297 [2023-08-03 16:58:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:58:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 297 [2023-08-03 16:58:52,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:58:54,078 INFO L124 PetriNetUnfolderBase]: 12873/19919 cut-off events. [2023-08-03 16:58:54,079 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-03 16:58:54,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38712 conditions, 19919 events. 12873/19919 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 143715 event pairs, 3816 based on Foata normal form. 0/18124 useless extension candidates. Maximal degree in co-relation 32392. Up to 12394 conditions per place. [2023-08-03 16:58:54,167 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 57 selfloop transitions, 2 changer transitions 2/70 dead transitions. [2023-08-03 16:58:54,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 291 flow [2023-08-03 16:58:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:58:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:58:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-03 16:58:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5499438832772167 [2023-08-03 16:58:54,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-03 16:58:54,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-03 16:58:54,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:58:54,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-03 16:58:54,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:54,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:54,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:54,193 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 108 flow. Second operand 3 states and 490 transitions. [2023-08-03 16:58:54,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 291 flow [2023-08-03 16:58:54,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:58:54,197 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 106 flow [2023-08-03 16:58:54,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-03 16:58:54,200 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-03 16:58:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 106 flow [2023-08-03 16:58:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:54,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:58:54,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:58:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:58:54,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:58:54,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:58:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1337128208, now seen corresponding path program 1 times [2023-08-03 16:58:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:58:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750309964] [2023-08-03 16:58:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:58:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:58:54,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:58:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:58:54,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:58:54,230 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:58:54,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-03 16:58:54,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-03 16:58:54,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-03 16:58:54,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-03 16:58:54,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-03 16:58:54,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-03 16:58:54,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-03 16:58:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:58:54,233 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 16:58:54,234 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:58:54,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:58:54,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:58:54,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:54,644 INFO L124 PetriNetUnfolderBase]: 282/4345 cut-off events. [2023-08-03 16:58:54,645 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 16:58:54,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 4345 events. 282/4345 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42346 event pairs, 0 based on Foata normal form. 0/3860 useless extension candidates. Maximal degree in co-relation 3140. Up to 162 conditions per place. [2023-08-03 16:58:54,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:54,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:54,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:58:54,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:54,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:54,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 197 transitions, 442 flow [2023-08-03 16:58:55,038 INFO L124 PetriNetUnfolderBase]: 282/4345 cut-off events. [2023-08-03 16:58:55,038 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 16:58:55,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 4345 events. 282/4345 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42346 event pairs, 0 based on Foata normal form. 0/3860 useless extension candidates. Maximal degree in co-relation 3140. Up to 162 conditions per place. [2023-08-03 16:58:55,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 11452 [2023-08-03 16:58:58,581 INFO L134 LiptonReduction]: Checked pairs total: 39220 [2023-08-03 16:58:58,582 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-03 16:58:58,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:58:58,584 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;@4569ad8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:58:58,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 16:58:58,586 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:58:58,586 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 16:58:58,586 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:58:58,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:58:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 16:58:58,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-03 16:58:58,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:58:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 32526434, now seen corresponding path program 1 times [2023-08-03 16:58:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:58:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112644948] [2023-08-03 16:58:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:58:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:58:58,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:58:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112644948] [2023-08-03 16:58:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112644948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:58:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:58:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:58:58,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062932365] [2023-08-03 16:58:58,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:58:58,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:58:58,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:58:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:58:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:58:58,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 341 [2023-08-03 16:58:58,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:58,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:58:58,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 341 [2023-08-03 16:58:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand