/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/increased_bounds/pthread_stack_longest-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:39:16,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:39:17,011 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:39:17,015 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:39:17,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:39:17,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:39:17,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:39:17,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:39:17,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:39:17,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:39:17,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:39:17,041 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:39:17,042 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:39:17,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:39:17,043 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:39:17,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:39:17,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:39:17,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:39:17,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:39:17,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:39:17,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:39:17,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:39:17,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:39:17,044 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:39:17,045 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:39:17,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:39:17,045 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:39:17,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:39:17,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:39:17,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:39:17,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:39:17,047 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:39:17,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:39:17,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:39:17,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:39:17,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:39:17,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:39:17,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:39:17,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:39:17,223 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:39:17,223 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:39:17,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-1_bound2.i [2023-08-04 01:39:18,137 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:39:18,343 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:39:18,344 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-1_bound2.i [2023-08-04 01:39:18,356 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dae1ce1d/6ef88e0797964d4483fe19055245eaa4/FLAGe970e0377 [2023-08-04 01:39:18,372 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dae1ce1d/6ef88e0797964d4483fe19055245eaa4 [2023-08-04 01:39:18,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:39:18,375 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:39:18,376 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:39:18,376 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:39:18,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:39:18,382 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9ea8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18, skipping insertion in model container [2023-08-04 01:39:18,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,422 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:39:18,654 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_stack_longest-1_bound2.i[41530,41543] [2023-08-04 01:39:18,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:39:18,683 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:39:18,695 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:39:18,696 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-04 01:39:18,706 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-04 01:39:18,711 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_stack_longest-1_bound2.i[41530,41543] [2023-08-04 01:39:18,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:39:18,754 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:39:18,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18 WrapperNode [2023-08-04 01:39:18,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:39:18,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:39:18,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:39:18,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:39:18,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,802 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 188 [2023-08-04 01:39:18,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:39:18,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:39:18,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:39:18,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:39:18,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,825 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:39:18,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:39:18,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:39:18,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:39:18,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (1/1) ... [2023-08-04 01:39:18,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:39:18,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:18,873 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 01:39:18,878 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 01:39:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:39:18,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:39:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:39:18,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:39:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:39:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:39:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:39:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:39:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:39:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:39:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:39:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:39:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:39:18,904 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 01:39:19,031 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:39:19,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:39:19,202 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:39:19,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:39:19,208 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:39:19,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:39:19 BoogieIcfgContainer [2023-08-04 01:39:19,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:39:19,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:39:19,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:39:19,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:39:19,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:39:18" (1/3) ... [2023-08-04 01:39:19,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439c7130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:39:19, skipping insertion in model container [2023-08-04 01:39:19,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:39:18" (2/3) ... [2023-08-04 01:39:19,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439c7130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:39:19, skipping insertion in model container [2023-08-04 01:39:19,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:39:19" (3/3) ... [2023-08-04 01:39:19,214 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longest-1_bound2.i [2023-08-04 01:39:19,219 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:39:19,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:39:19,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 01:39:19,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:39:19,288 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:39:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,400 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-04 01:39:19,400 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:39:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1450 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:39:19,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:39:19,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 398 flow [2023-08-04 01:39:19,501 INFO L124 PetriNetUnfolderBase]: 37/343 cut-off events. [2023-08-04 01:39:19,501 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:39:19,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 343 events. 37/343 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1450 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2023-08-04 01:39:19,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 15606 [2023-08-04 01:39:22,395 INFO L134 LiptonReduction]: Checked pairs total: 22758 [2023-08-04 01:39:22,395 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 01:39:22,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:39:22,408 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;@3bbb445b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:39:22,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:39:22,418 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:39:22,418 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 01:39:22,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:39:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:39:22,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:22,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1220685095, now seen corresponding path program 1 times [2023-08-04 01:39:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880135917] [2023-08-04 01:39:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:39:22,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:39:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:39:22,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:39:22,594 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:39:22,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:39:22,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:39:22,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:39:22,597 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:39:22,598 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:39:22,599 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:39:22,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:39:22,628 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:39:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,788 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:39:22,788 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:22,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:39:22,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:39:22,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:39:22,907 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:39:22,907 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:39:22,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:39:22,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:39:26,716 INFO L134 LiptonReduction]: Checked pairs total: 88803 [2023-08-04 01:39:26,716 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-04 01:39:26,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:39:26,724 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;@3bbb445b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:39:26,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:39:26,732 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:39:26,732 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-08-04 01:39:26,732 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:39:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:39:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:39:26,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:39:26,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:39:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1482575341, now seen corresponding path program 1 times [2023-08-04 01:39:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:39:26,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775135637] [2023-08-04 01:39:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:26,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:39:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:39:26,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:39:26,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775135637] [2023-08-04 01:39:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775135637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:39:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228214997] [2023-08-04 01:39:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:39:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:39:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:39:26,877 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 01:39:26,878 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 01:39:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:39:26,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:39:26,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:39:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:39:26,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:39:26,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228214997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:39:26,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:39:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:39:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438890080] [2023-08-04 01:39:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:39:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:39:27,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:39:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:39:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:39:27,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 570 [2023-08-04 01:39:27,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 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 01:39:27,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:39:27,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 570 [2023-08-04 01:39:27,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:08,639 INFO L124 PetriNetUnfolderBase]: 684361/862139 cut-off events. [2023-08-04 01:40:08,640 INFO L125 PetriNetUnfolderBase]: For 37480/37480 co-relation queries the response was YES. [2023-08-04 01:40:09,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732561 conditions, 862139 events. 684361/862139 cut-off events. For 37480/37480 co-relation queries the response was YES. Maximal size of possible extension queue 17653. Compared 5393823 event pairs, 265264 based on Foata normal form. 0/610066 useless extension candidates. Maximal degree in co-relation 226452. Up to 850820 conditions per place. [2023-08-04 01:40:11,118 INFO L140 encePairwiseOnDemand]: 566/570 looper letters, 92 selfloop transitions, 5 changer transitions 17/119 dead transitions. [2023-08-04 01:40:11,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 119 transitions, 506 flow [2023-08-04 01:40:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:40:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:40:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1443 transitions. [2023-08-04 01:40:11,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063157894736842 [2023-08-04 01:40:11,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1443 transitions. [2023-08-04 01:40:11,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1443 transitions. [2023-08-04 01:40:11,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:11,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1443 transitions. [2023-08-04 01:40:11,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 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 01:40:11,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 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 01:40:11,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 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 01:40:11,153 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 5 states and 1443 transitions. [2023-08-04 01:40:11,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 119 transitions, 506 flow [2023-08-04 01:40:11,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:40:11,177 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 171 flow [2023-08-04 01:40:11,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-04 01:40:11,180 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-04 01:40:11,180 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 171 flow [2023-08-04 01:40:11,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 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 01:40:11,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:11,181 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:40:11,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:40:11,387 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 01:40:11,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:40:11,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2144894996, now seen corresponding path program 1 times [2023-08-04 01:40:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:11,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325390960] [2023-08-04 01:40:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:40:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325390960] [2023-08-04 01:40:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325390960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:40:11,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:40:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:40:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889939903] [2023-08-04 01:40:11,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:40:11,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:40:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:40:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:40:11,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 570 [2023-08-04 01:40:11,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 01:40:11,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:11,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 570 [2023-08-04 01:40:11,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:22,799 INFO L124 PetriNetUnfolderBase]: 208714/262428 cut-off events. [2023-08-04 01:40:22,800 INFO L125 PetriNetUnfolderBase]: For 4920/4920 co-relation queries the response was YES. [2023-08-04 01:40:23,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528715 conditions, 262428 events. 208714/262428 cut-off events. For 4920/4920 co-relation queries the response was YES. Maximal size of possible extension queue 6608. Compared 1473929 event pairs, 117410 based on Foata normal form. 1/199330 useless extension candidates. Maximal degree in co-relation 57497. Up to 260633 conditions per place. [2023-08-04 01:40:24,011 INFO L140 encePairwiseOnDemand]: 567/570 looper letters, 72 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 01:40:24,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 340 flow [2023-08-04 01:40:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:40:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:40:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 875 transitions. [2023-08-04 01:40:24,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2023-08-04 01:40:24,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 875 transitions. [2023-08-04 01:40:24,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 875 transitions. [2023-08-04 01:40:24,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:24,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 875 transitions. [2023-08-04 01:40:24,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 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 01:40:24,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 01:40:24,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 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 01:40:24,020 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 171 flow. Second operand 3 states and 875 transitions. [2023-08-04 01:40:24,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 340 flow [2023-08-04 01:40:24,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 79 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:40:24,027 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 167 flow [2023-08-04 01:40:24,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-04 01:40:24,028 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:40:24,028 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 167 flow [2023-08-04 01:40:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 01:40:24,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:24,029 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:40:24,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:40:24,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:40:24,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash 880129790, now seen corresponding path program 1 times [2023-08-04 01:40:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:24,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628545695] [2023-08-04 01:40:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:40:24,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:24,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628545695] [2023-08-04 01:40:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628545695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:40:24,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662508416] [2023-08-04 01:40:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:24,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:40:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:40:24,077 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 01:40:24,079 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 01:40:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:24,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:40:24,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:40:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:40:24,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:40:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:40:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662508416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:40:24,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:40:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:40:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235677323] [2023-08-04 01:40:24,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:40:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:40:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:40:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:40:24,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 570 [2023-08-04 01:40:24,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 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 01:40:24,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:24,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 570 [2023-08-04 01:40:24,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:34,575 INFO L124 PetriNetUnfolderBase]: 194474/243028 cut-off events. [2023-08-04 01:40:34,575 INFO L125 PetriNetUnfolderBase]: For 3730/3730 co-relation queries the response was YES. [2023-08-04 01:40:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489396 conditions, 243028 events. 194474/243028 cut-off events. For 3730/3730 co-relation queries the response was YES. Maximal size of possible extension queue 6410. Compared 1333546 event pairs, 68200 based on Foata normal form. 10/184709 useless extension candidates. Maximal degree in co-relation 57431. Up to 241421 conditions per place. [2023-08-04 01:40:35,535 INFO L140 encePairwiseOnDemand]: 567/570 looper letters, 92 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-08-04 01:40:35,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 422 flow [2023-08-04 01:40:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:40:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:40:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1160 transitions. [2023-08-04 01:40:35,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-04 01:40:35,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1160 transitions. [2023-08-04 01:40:35,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1160 transitions. [2023-08-04 01:40:35,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:35,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1160 transitions. [2023-08-04 01:40:35,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 01:40:35,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 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 01:40:35,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 570.0) internal successors, (2850), 5 states have internal predecessors, (2850), 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 01:40:35,544 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 167 flow. Second operand 4 states and 1160 transitions. [2023-08-04 01:40:35,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 422 flow [2023-08-04 01:40:35,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:40:35,547 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 164 flow [2023-08-04 01:40:35,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-08-04 01:40:35,548 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-08-04 01:40:35,548 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 164 flow [2023-08-04 01:40:35,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 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 01:40:35,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:35,551 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:40:35,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 01:40:35,754 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,SelfDestructingSolverStorable3 [2023-08-04 01:40:35,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:40:35,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash -72622417, now seen corresponding path program 1 times [2023-08-04 01:40:35,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959002159] [2023-08-04 01:40:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:40:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:35,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959002159] [2023-08-04 01:40:35,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959002159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:40:35,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628338702] [2023-08-04 01:40:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:35,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:40:35,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:40:35,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:40:35,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:40:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:35,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:40:35,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:40:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:40:35,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:40:35,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628338702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:40:35,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:40:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:40:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520106113] [2023-08-04 01:40:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:40:35,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:40:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:40:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:40:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 570 [2023-08-04 01:40:35,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 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 01:40:35,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:35,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 570 [2023-08-04 01:40:35,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:40:43,257 INFO L124 PetriNetUnfolderBase]: 129194/163360 cut-off events. [2023-08-04 01:40:43,257 INFO L125 PetriNetUnfolderBase]: For 1942/1942 co-relation queries the response was YES. [2023-08-04 01:40:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329548 conditions, 163360 events. 129194/163360 cut-off events. For 1942/1942 co-relation queries the response was YES. Maximal size of possible extension queue 4923. Compared 882790 event pairs, 288 based on Foata normal form. 14400/137667 useless extension candidates. Maximal degree in co-relation 96839. Up to 79680 conditions per place. [2023-08-04 01:40:43,542 INFO L140 encePairwiseOnDemand]: 567/570 looper letters, 0 selfloop transitions, 0 changer transitions 175/175 dead transitions. [2023-08-04 01:40:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 175 transitions, 722 flow [2023-08-04 01:40:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:40:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:40:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1501 transitions. [2023-08-04 01:40:43,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2023-08-04 01:40:43,545 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1501 transitions. [2023-08-04 01:40:43,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1501 transitions. [2023-08-04 01:40:43,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:40:43,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1501 transitions. [2023-08-04 01:40:43,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.2) internal successors, (1501), 5 states have internal predecessors, (1501), 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 01:40:43,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 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 01:40:43,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 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 01:40:43,553 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 164 flow. Second operand 5 states and 1501 transitions. [2023-08-04 01:40:43,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 175 transitions, 722 flow [2023-08-04 01:40:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 175 transitions, 715 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:40:43,771 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 01:40:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 01:40:43,773 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2023-08-04 01:40:43,773 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 01:40:43,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 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 01:40:43,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:40:43,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:40:43,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:40:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:40:43,981 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:40:43,982 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:40:43,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,065 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:40:44,066 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:40:44,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:40:44,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:40:44,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 301 transitions, 650 flow [2023-08-04 01:40:44,156 INFO L124 PetriNetUnfolderBase]: 141/1023 cut-off events. [2023-08-04 01:40:44,156 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 01:40:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1023 events. 141/1023 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6366 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 624. Up to 32 conditions per place. [2023-08-04 01:40:44,189 INFO L119 LiptonReduction]: Number of co-enabled transitions 56256 [2023-08-04 01:40:47,708 INFO L134 LiptonReduction]: Checked pairs total: 87927 [2023-08-04 01:40:47,708 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-08-04 01:40:47,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:40:47,709 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;@3bbb445b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:40:47,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 01:40:47,711 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:40:47,711 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2023-08-04 01:40:47,712 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 01:40:47,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:40:47,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:40:47,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:40:47,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:40:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1491750412, now seen corresponding path program 1 times [2023-08-04 01:40:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:40:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266010945] [2023-08-04 01:40:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:40:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:40:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:40:47,774 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 01:40:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:40:47,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266010945] [2023-08-04 01:40:47,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266010945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:40:47,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:40:47,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:40:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57198484] [2023-08-04 01:40:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:40:47,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:40:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:40:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:40:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:40:47,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 571 [2023-08-04 01:40:47,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 01:40:47,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:40:47,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 571 [2023-08-04 01:40:47,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:42:01,907 INFO L124 PetriNetUnfolderBase]: 1266839/1606959 cut-off events. [2023-08-04 01:42:01,907 INFO L125 PetriNetUnfolderBase]: For 74487/74487 co-relation queries the response was YES. [2023-08-04 01:42:04,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225016 conditions, 1606959 events. 1266839/1606959 cut-off events. For 74487/74487 co-relation queries the response was YES. Maximal size of possible extension queue 29677. Compared 10713402 event pairs, 408001 based on Foata normal form. 0/1156275 useless extension candidates. Maximal degree in co-relation 1852508. Up to 874360 conditions per place. [2023-08-04 01:42:11,446 INFO L140 encePairwiseOnDemand]: 561/571 looper letters, 138 selfloop transitions, 7 changer transitions 0/153 dead transitions. [2023-08-04 01:42:11,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 153 transitions, 681 flow [2023-08-04 01:42:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:42:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:42:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 940 transitions. [2023-08-04 01:42:11,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487448920023351 [2023-08-04 01:42:11,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 940 transitions. [2023-08-04 01:42:11,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 940 transitions. [2023-08-04 01:42:11,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:42:11,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 940 transitions. [2023-08-04 01:42:11,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 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 01:42:11,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 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 01:42:11,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 571.0) internal successors, (2284), 4 states have internal predecessors, (2284), 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 01:42:11,474 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 214 flow. Second operand 3 states and 940 transitions. [2023-08-04 01:42:11,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 153 transitions, 681 flow [2023-08-04 01:42:11,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 153 transitions, 681 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:42:11,565 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 272 flow [2023-08-04 01:42:11,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=571, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 01:42:11,567 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-04 01:42:11,567 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 272 flow [2023-08-04 01:42:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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 01:42:11,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:42:11,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:42:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:42:11,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 01:42:11,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:42:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash -488526651, now seen corresponding path program 1 times [2023-08-04 01:42:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:42:11,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837486059] [2023-08-04 01:42:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:42:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:42:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:42:11,640 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 01:42:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:42:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837486059] [2023-08-04 01:42:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837486059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:42:11,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:42:11,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:42:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651005164] [2023-08-04 01:42:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:42:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:42:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:42:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:42:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:42:11,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 571 [2023-08-04 01:42:11,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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 01:42:11,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:42:11,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 571 [2023-08-04 01:42:11,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand