/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_03-munge_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:23:34,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:23:34,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:23:34,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:23:34,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:23:34,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:23:34,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:23:34,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:23:34,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:23:34,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:23:34,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:23:34,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:23:34,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:23:34,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:23:34,870 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:23:34,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:23:34,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:23:34,871 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:23:34,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:23:34,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:23:34,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:23:34,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:23:34,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:23:34,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:23:34,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:23:34,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:23:34,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:23:34,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:23:34,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:23:34,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:23:34,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:34,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:23:34,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:23:34,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:23:34,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:23:34,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:23:34,877 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:23:34,877 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:23:34,877 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:23:34,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:23:34,877 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:23:34,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:23:35,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:23:35,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:23:35,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:23:35,141 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:23:35,141 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:23:35,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_03-munge_racing_bound2.i [2023-08-03 21:23:36,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:23:36,584 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:23:36,585 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_03-munge_racing_bound2.i [2023-08-03 21:23:36,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467eb89b4/a00188f5393a4fd2a266f405d7aa03ec/FLAG51575689a [2023-08-03 21:23:36,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467eb89b4/a00188f5393a4fd2a266f405d7aa03ec [2023-08-03 21:23:36,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:23:36,616 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:23:36,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:36,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:23:36,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:23:36,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6862f8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36, skipping insertion in model container [2023-08-03 21:23:36,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,654 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:23:36,903 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_03-munge_racing_bound2.i[30176,30189] [2023-08-03 21:23:36,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:36,951 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:23:36,975 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:23:36,977 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:23:36,991 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_03-munge_racing_bound2.i[30176,30189] [2023-08-03 21:23:36,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:37,032 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:23:37,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37 WrapperNode [2023-08-03 21:23:37,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:37,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:37,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:23:37,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:23:37,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,083 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 201 [2023-08-03 21:23:37,083 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:37,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:23:37,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:23:37,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:23:37,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:23:37,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:23:37,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:23:37,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:23:37,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:37,142 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 21:23:37,165 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 21:23:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:23:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 21:23:37,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 21:23:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:23:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:23:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:23:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:23:37,182 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-03 21:23:37,182 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-03 21:23:37,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:23:37,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:23:37,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:23:37,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:23:37,184 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 21:23:37,319 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:23:37,321 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:23:37,565 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:23:37,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:23:37,574 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-03 21:23:37,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:37 BoogieIcfgContainer [2023-08-03 21:23:37,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:23:37,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:23:37,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:23:37,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:23:37,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:23:36" (1/3) ... [2023-08-03 21:23:37,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44475a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:37, skipping insertion in model container [2023-08-03 21:23:37,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (2/3) ... [2023-08-03 21:23:37,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44475a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:37, skipping insertion in model container [2023-08-03 21:23:37,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:37" (3/3) ... [2023-08-03 21:23:37,583 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_03-munge_racing_bound2.i [2023-08-03 21:23:37,589 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:23:37,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:23:37,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 21:23:37,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:23:37,686 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:23:37,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,828 INFO L124 PetriNetUnfolderBase]: 58/356 cut-off events. [2023-08-03 21:23:37,828 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:23:37,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 356 events. 58/356 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1472 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-03 21:23:37,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:37,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,865 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 198 transitions, 418 flow [2023-08-03 21:23:37,935 INFO L124 PetriNetUnfolderBase]: 58/356 cut-off events. [2023-08-03 21:23:37,935 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:23:37,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 356 events. 58/356 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1472 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-03 21:23:37,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 15876 [2023-08-03 21:23:41,537 INFO L134 LiptonReduction]: Checked pairs total: 30997 [2023-08-03 21:23:41,538 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-03 21:23:41,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:41,555 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;@1a7d39cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:41,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:23:41,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:41,560 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 21:23:41,560 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:41,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:41,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:23:41,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:41,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2102750666, now seen corresponding path program 1 times [2023-08-03 21:23:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182431972] [2023-08-03 21:23:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:41,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:23:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:41,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:23:41,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:23:41,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 21:23:41,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 21:23:41,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:23:41,789 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:23:41,791 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 21:23:41,792 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:23:41,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:23:41,851 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:23:41,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,025 INFO L124 PetriNetUnfolderBase]: 197/1044 cut-off events. [2023-08-03 21:23:42,026 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-03 21:23:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1044 events. 197/1044 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6019 event pairs, 1 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 645. Up to 32 conditions per place. [2023-08-03 21:23:42,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,056 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:42,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 312 transitions, 672 flow [2023-08-03 21:23:42,236 INFO L124 PetriNetUnfolderBase]: 197/1044 cut-off events. [2023-08-03 21:23:42,236 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-03 21:23:42,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1044 events. 197/1044 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6019 event pairs, 1 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 645. Up to 32 conditions per place. [2023-08-03 21:23:42,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 57240 [2023-08-03 21:23:46,319 INFO L134 LiptonReduction]: Checked pairs total: 122272 [2023-08-03 21:23:46,319 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-08-03 21:23:46,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:46,322 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;@1a7d39cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:46,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 21:23:46,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:46,331 INFO L124 PetriNetUnfolderBase]: 28/119 cut-off events. [2023-08-03 21:23:46,331 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 21:23:46,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:46,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:23:46,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:46,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1506749400, now seen corresponding path program 1 times [2023-08-03 21:23:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850365303] [2023-08-03 21:23:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:23:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850365303] [2023-08-03 21:23:46,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850365303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:23:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218703758] [2023-08-03 21:23:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:46,525 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) [2023-08-03 21:23:46,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:23:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:23:46,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:23:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:23:46,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:23:46,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218703758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:46,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:23:46,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:23:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331647385] [2023-08-03 21:23:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:46,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:23:46,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 521 [2023-08-03 21:23:46,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 149 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 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 21:23:46,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:46,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 521 [2023-08-03 21:23:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:26:02,830 INFO L124 PetriNetUnfolderBase]: 1190047/1666891 cut-off events. [2023-08-03 21:26:02,831 INFO L125 PetriNetUnfolderBase]: For 59637/59637 co-relation queries the response was YES. [2023-08-03 21:26:08,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175950 conditions, 1666891 events. 1190047/1666891 cut-off events. For 59637/59637 co-relation queries the response was YES. Maximal size of possible extension queue 47496. Compared 15871195 event pairs, 625870 based on Foata normal form. 445019/1737616 useless extension candidates. Maximal degree in co-relation 335894. Up to 1475053 conditions per place. [2023-08-03 21:26:15,584 INFO L140 encePairwiseOnDemand]: 475/521 looper letters, 108 selfloop transitions, 5 changer transitions 2/147 dead transitions. [2023-08-03 21:26:15,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 568 flow [2023-08-03 21:26:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:26:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:26:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1405 transitions. [2023-08-03 21:26:15,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393474088291746 [2023-08-03 21:26:15,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1405 transitions. [2023-08-03 21:26:15,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1405 transitions. [2023-08-03 21:26:15,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:26:15,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1405 transitions. [2023-08-03 21:26:15,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 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 21:26:15,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 521.0) internal successors, (3126), 6 states have internal predecessors, (3126), 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 21:26:15,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 521.0) internal successors, (3126), 6 states have internal predecessors, (3126), 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 21:26:15,649 INFO L175 Difference]: Start difference. First operand has 104 places, 149 transitions, 346 flow. Second operand 5 states and 1405 transitions. [2023-08-03 21:26:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 568 flow [2023-08-03 21:26:15,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 147 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:26:15,694 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 263 flow [2023-08-03 21:26:15,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=521, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2023-08-03 21:26:15,699 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-03 21:26:15,700 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 263 flow [2023-08-03 21:26:15,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 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 21:26:15,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:26:15,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 21:26:15,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:26:15,906 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 [2023-08-03 21:26:15,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:26:15,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:26:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash -723828467, now seen corresponding path program 1 times [2023-08-03 21:26:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:26:15,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467237391] [2023-08-03 21:26:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:26:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:26:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:26:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:26:16,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:26:16,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467237391] [2023-08-03 21:26:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467237391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:26:16,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:26:16,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:26:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267561681] [2023-08-03 21:26:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:26:16,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:26:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:26:16,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:26:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:26:16,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 521 [2023-08-03 21:26:16,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 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 21:26:16,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:26:16,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 521 [2023-08-03 21:26:16,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand