/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/goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:06:30,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:06:30,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:06:30,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:06:30,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:06:30,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:06:30,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:06:30,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:06:30,366 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:06:30,367 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:06:30,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:06:30,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:06:30,368 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:06:30,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:06:30,368 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:06:30,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:06:30,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:06:30,369 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:06:30,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:06:30,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:06:30,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:06:30,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:06:30,377 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:06:30,377 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:06:30,380 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:06:30,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:06:30,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:06:30,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:06:30,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:06:30,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:06:30,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:30,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:06:30,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:06:30,383 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:06:30,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:06:30,383 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:06:30,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:06:30,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:06:30,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:06:30,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:06:30,558 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:06:30,558 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:06:30,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:31,524 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:06:31,715 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:06:31,715 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:31,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8a090d8c/f48b786098a343a08bf420327e6ce751/FLAGbb2894222 [2023-08-03 22:06:31,742 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8a090d8c/f48b786098a343a08bf420327e6ce751 [2023-08-03 22:06:31,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:06:31,745 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:06:31,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:31,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:06:31,747 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:06:31,748 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:31" (1/1) ... [2023-08-03 22:06:31,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27fc4182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:31, skipping insertion in model container [2023-08-03 22:06:31,748 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:31" (1/1) ... [2023-08-03 22:06:31,781 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:06:31,870 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i[1105,1118] [2023-08-03 22:06:31,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:31,960 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:06:31,969 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i[1105,1118] [2023-08-03 22:06:31,985 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:06:31,986 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:06:32,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:32,039 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:06:32,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32 WrapperNode [2023-08-03 22:06:32,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:32,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:32,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:06:32,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:06:32,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,065 INFO L138 Inliner]: procedures = 162, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2023-08-03 22:06:32,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:32,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:06:32,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:06:32,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:06:32,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:06:32,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:06:32,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:06:32,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:06:32,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (1/1) ... [2023-08-03 22:06:32,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:32,122 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 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 22:06:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 22:06:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:06:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:06:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:06:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:06:32,145 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 22:06:32,147 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 22:06:32,258 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:06:32,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:06:32,420 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:06:32,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:06:32,425 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:06:32,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:32 BoogieIcfgContainer [2023-08-03 22:06:32,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:06:32,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:06:32,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:06:32,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:06:32,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:06:31" (1/3) ... [2023-08-03 22:06:32,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a9681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:32, skipping insertion in model container [2023-08-03 22:06:32,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:32" (2/3) ... [2023-08-03 22:06:32,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a9681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:32, skipping insertion in model container [2023-08-03 22:06:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:32" (3/3) ... [2023-08-03 22:06:32,431 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_32-traces-mine-vs-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:32,437 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:06:32,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:06:32,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:06:32,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:06:32,477 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 22:06:32,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 220 flow [2023-08-03 22:06:32,545 INFO L124 PetriNetUnfolderBase]: 9/150 cut-off events. [2023-08-03 22:06:32,545 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:32,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 9/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-03 22:06:32,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 106 transitions, 220 flow [2023-08-03 22:06:32,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 61 transitions, 127 flow [2023-08-03 22:06:32,553 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:32,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 61 transitions, 127 flow [2023-08-03 22:06:32,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 61 transitions, 127 flow [2023-08-03 22:06:32,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 127 flow [2023-08-03 22:06:32,594 INFO L124 PetriNetUnfolderBase]: 0/65 cut-off events. [2023-08-03 22:06:32,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-03 22:06:32,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 340 [2023-08-03 22:06:34,965 INFO L134 LiptonReduction]: Checked pairs total: 207 [2023-08-03 22:06:34,965 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-03 22:06:34,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:34,978 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;@67b4feb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:34,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:34,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:34,981 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:06:34,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:34,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:34,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:34,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:34,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 10625073, now seen corresponding path program 1 times [2023-08-03 22:06:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77795831] [2023-08-03 22:06:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:35,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:06:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:35,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:06:35,124 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:06:35,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:06:35,126 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:35,127 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:06:35,128 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:06:35,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:06:35,154 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 22:06:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 125 transitions, 268 flow [2023-08-03 22:06:35,207 INFO L124 PetriNetUnfolderBase]: 16/237 cut-off events. [2023-08-03 22:06:35,207 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 237 events. 16/237 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 574 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-03 22:06:35,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 125 transitions, 268 flow [2023-08-03 22:06:35,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 79 transitions, 170 flow [2023-08-03 22:06:35,209 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:35,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 79 transitions, 170 flow [2023-08-03 22:06:35,209 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 79 transitions, 170 flow [2023-08-03 22:06:35,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 79 transitions, 170 flow [2023-08-03 22:06:35,216 INFO L124 PetriNetUnfolderBase]: 0/92 cut-off events. [2023-08-03 22:06:35,216 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:35,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 0/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-03 22:06:35,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 1292 [2023-08-03 22:06:37,363 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-08-03 22:06:37,363 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-03 22:06:37,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:37,365 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;@67b4feb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:37,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:37,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:37,368 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:06:37,368 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:37,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:37,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:06:37,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:37,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 405007749, now seen corresponding path program 1 times [2023-08-03 22:06:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345805071] [2023-08-03 22:06:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:37,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345805071] [2023-08-03 22:06:37,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345805071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:37,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:37,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951558854] [2023-08-03 22:06:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:06:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:06:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:06:37,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 180 [2023-08-03 22:06:37,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 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 22:06:37,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:37,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 180 [2023-08-03 22:06:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:37,593 INFO L124 PetriNetUnfolderBase]: 42/146 cut-off events. [2023-08-03 22:06:37,594 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-03 22:06:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 146 events. 42/146 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 6 based on Foata normal form. 42/186 useless extension candidates. Maximal degree in co-relation 49. Up to 91 conditions per place. [2023-08-03 22:06:37,595 INFO L140 encePairwiseOnDemand]: 178/180 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2023-08-03 22:06:37,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 112 flow [2023-08-03 22:06:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-03 22:06:37,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2023-08-03 22:06:37,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-03 22:06:37,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-03 22:06:37,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:37,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-03 22:06:37,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 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 22:06:37,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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 22:06:37,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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 22:06:37,615 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 4 states and 466 transitions. [2023-08-03 22:06:37,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 112 flow [2023-08-03 22:06:37,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:37,617 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-03 22:06:37,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-03 22:06:37,621 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-03 22:06:37,621 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-03 22:06:37,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 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 22:06:37,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:37,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:06:37,622 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:37,622 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:06:37,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 125 transitions, 268 flow [2023-08-03 22:06:37,640 INFO L124 PetriNetUnfolderBase]: 16/237 cut-off events. [2023-08-03 22:06:37,640 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:37,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 237 events. 16/237 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 574 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-03 22:06:37,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 125 transitions, 268 flow [2023-08-03 22:06:37,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 214 flow [2023-08-03 22:06:37,651 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:37,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 103 transitions, 214 flow [2023-08-03 22:06:37,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 103 transitions, 214 flow [2023-08-03 22:06:37,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 214 flow [2023-08-03 22:06:37,668 INFO L124 PetriNetUnfolderBase]: 6/166 cut-off events. [2023-08-03 22:06:37,668 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:37,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 166 events. 6/166 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 358 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 116. Up to 6 conditions per place. [2023-08-03 22:06:37,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 2924 [2023-08-03 22:06:39,826 INFO L134 LiptonReduction]: Checked pairs total: 11709 [2023-08-03 22:06:39,827 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-03 22:06:39,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:06:39,829 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;@67b4feb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:39,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:06:39,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:39,830 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 22:06:39,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:39,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:39,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:39,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:39,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash 18963250, now seen corresponding path program 1 times [2023-08-03 22:06:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:39,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311474091] [2023-08-03 22:06:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:39,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311474091] [2023-08-03 22:06:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311474091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:39,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:39,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:06:39,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110674196] [2023-08-03 22:06:39,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:39,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:39,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 196 [2023-08-03 22:06:39,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 22:06:39,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:39,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 196 [2023-08-03 22:06:39,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:40,033 INFO L124 PetriNetUnfolderBase]: 729/1590 cut-off events. [2023-08-03 22:06:40,034 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 22:06:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2838 conditions, 1590 events. 729/1590 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10443 event pairs, 315 based on Foata normal form. 49/1461 useless extension candidates. Maximal degree in co-relation 380. Up to 1213 conditions per place. [2023-08-03 22:06:40,040 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 28 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-03 22:06:40,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 158 flow [2023-08-03 22:06:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-03 22:06:40,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2023-08-03 22:06:40,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-03 22:06:40,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-03 22:06:40,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:40,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-03 22:06:40,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 22:06:40,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:40,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:40,047 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 366 transitions. [2023-08-03 22:06:40,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 158 flow [2023-08-03 22:06:40,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:06:40,049 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 90 flow [2023-08-03 22:06:40,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-03 22:06:40,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-03 22:06:40,050 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 90 flow [2023-08-03 22:06:40,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 22:06:40,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:40,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:40,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:06:40,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:40,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1328062732, now seen corresponding path program 1 times [2023-08-03 22:06:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:40,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941958961] [2023-08-03 22:06:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:40,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941958961] [2023-08-03 22:06:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941958961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52388973] [2023-08-03 22:06:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:40,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:40,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:40,142 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 22:06:40,145 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 22:06:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:40,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:06:40,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:40,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52388973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:40,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:40,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:06:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408978558] [2023-08-03 22:06:40,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:40,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 196 [2023-08-03 22:06:40,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 22:06:40,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:40,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 196 [2023-08-03 22:06:40,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:40,394 INFO L124 PetriNetUnfolderBase]: 616/1225 cut-off events. [2023-08-03 22:06:40,394 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-03 22:06:40,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 1225 events. 616/1225 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7330 event pairs, 118 based on Foata normal form. 7/1174 useless extension candidates. Maximal degree in co-relation 583. Up to 792 conditions per place. [2023-08-03 22:06:40,399 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 38 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-03 22:06:40,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 212 flow [2023-08-03 22:06:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-03 22:06:40,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2023-08-03 22:06:40,400 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-03 22:06:40,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-03 22:06:40,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:40,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-03 22:06:40,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 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 22:06:40,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:40,403 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:40,403 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 90 flow. Second operand 4 states and 483 transitions. [2023-08-03 22:06:40,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 212 flow [2023-08-03 22:06:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:40,408 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 102 flow [2023-08-03 22:06:40,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-03 22:06:40,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 22:06:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 102 flow [2023-08-03 22:06:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 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 22:06:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:40,418 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 22:06:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:40,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:40,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 465191557, now seen corresponding path program 1 times [2023-08-03 22:06:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:40,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138585315] [2023-08-03 22:06:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138585315] [2023-08-03 22:06:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138585315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:40,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:40,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:06:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548148157] [2023-08-03 22:06:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:40,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:40,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 196 [2023-08-03 22:06:40,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 22:06:40,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:40,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 196 [2023-08-03 22:06:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:40,885 INFO L124 PetriNetUnfolderBase]: 636/1478 cut-off events. [2023-08-03 22:06:40,886 INFO L125 PetriNetUnfolderBase]: For 551/551 co-relation queries the response was YES. [2023-08-03 22:06:40,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2903 conditions, 1478 events. 636/1478 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9977 event pairs, 382 based on Foata normal form. 48/1451 useless extension candidates. Maximal degree in co-relation 1845. Up to 742 conditions per place. [2023-08-03 22:06:40,890 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 38 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-03 22:06:40,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 252 flow [2023-08-03 22:06:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 22:06:40,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2023-08-03 22:06:40,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 22:06:40,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 22:06:40,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:40,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 22:06:40,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 22:06:40,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:40,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:40,893 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 102 flow. Second operand 3 states and 374 transitions. [2023-08-03 22:06:40,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 252 flow [2023-08-03 22:06:40,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 240 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:40,896 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 143 flow [2023-08-03 22:06:40,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-03 22:06:40,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 22:06:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 143 flow [2023-08-03 22:06:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 22:06:40,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:40,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:06:40,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:40,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 439818183, now seen corresponding path program 1 times [2023-08-03 22:06:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:40,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994839488] [2023-08-03 22:06:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994839488] [2023-08-03 22:06:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994839488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987069797] [2023-08-03 22:06:40,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:40,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:40,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:40,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 196 [2023-08-03 22:06:40,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 22:06:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 196 [2023-08-03 22:06:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:41,154 INFO L124 PetriNetUnfolderBase]: 1569/3084 cut-off events. [2023-08-03 22:06:41,155 INFO L125 PetriNetUnfolderBase]: For 1374/1374 co-relation queries the response was YES. [2023-08-03 22:06:41,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7187 conditions, 3084 events. 1569/3084 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 19675 event pairs, 660 based on Foata normal form. 409/3487 useless extension candidates. Maximal degree in co-relation 3398. Up to 1725 conditions per place. [2023-08-03 22:06:41,164 INFO L140 encePairwiseOnDemand]: 180/196 looper letters, 50 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2023-08-03 22:06:41,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 374 flow [2023-08-03 22:06:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-03 22:06:41,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-08-03 22:06:41,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-03 22:06:41,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-03 22:06:41,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:41,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-03 22:06:41,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 22:06:41,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:41,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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 22:06:41,167 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 143 flow. Second operand 3 states and 350 transitions. [2023-08-03 22:06:41,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 374 flow [2023-08-03 22:06:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:06:41,170 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 219 flow [2023-08-03 22:06:41,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-08-03 22:06:41,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-03 22:06:41,171 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 219 flow [2023-08-03 22:06:41,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 22:06:41,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:41,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:41,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:06:41,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:41,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -50874428, now seen corresponding path program 1 times [2023-08-03 22:06:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030770558] [2023-08-03 22:06:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030770558] [2023-08-03 22:06:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030770558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:41,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:41,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:41,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345757298] [2023-08-03 22:06:41,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:41,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:41,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 196 [2023-08-03 22:06:41,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:41,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:41,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 196 [2023-08-03 22:06:41,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:41,494 INFO L124 PetriNetUnfolderBase]: 766/1770 cut-off events. [2023-08-03 22:06:41,494 INFO L125 PetriNetUnfolderBase]: For 1197/1197 co-relation queries the response was YES. [2023-08-03 22:06:41,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5274 conditions, 1770 events. 766/1770 cut-off events. For 1197/1197 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11308 event pairs, 248 based on Foata normal form. 155/1911 useless extension candidates. Maximal degree in co-relation 2628. Up to 838 conditions per place. [2023-08-03 22:06:41,500 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 60 selfloop transitions, 14 changer transitions 4/84 dead transitions. [2023-08-03 22:06:41,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 525 flow [2023-08-03 22:06:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-03 22:06:41,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727040816326531 [2023-08-03 22:06:41,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-03 22:06:41,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-03 22:06:41,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:41,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-03 22:06:41,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 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 22:06:41,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:41,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:41,504 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 219 flow. Second operand 4 states and 449 transitions. [2023-08-03 22:06:41,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 525 flow [2023-08-03 22:06:41,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 84 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:41,507 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 274 flow [2023-08-03 22:06:41,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-03 22:06:41,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2023-08-03 22:06:41,508 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 274 flow [2023-08-03 22:06:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:06:41,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:41,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1749700306, now seen corresponding path program 1 times [2023-08-03 22:06:41,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:41,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114019944] [2023-08-03 22:06:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114019944] [2023-08-03 22:06:41,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114019944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:41,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:41,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:41,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938576048] [2023-08-03 22:06:41,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:41,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:41,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 196 [2023-08-03 22:06:41,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 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 22:06:41,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:41,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 196 [2023-08-03 22:06:41,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:41,831 INFO L124 PetriNetUnfolderBase]: 589/1397 cut-off events. [2023-08-03 22:06:41,831 INFO L125 PetriNetUnfolderBase]: For 1050/1061 co-relation queries the response was YES. [2023-08-03 22:06:41,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 1397 events. 589/1397 cut-off events. For 1050/1061 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8579 event pairs, 235 based on Foata normal form. 20/1399 useless extension candidates. Maximal degree in co-relation 2105. Up to 698 conditions per place. [2023-08-03 22:06:41,836 INFO L140 encePairwiseOnDemand]: 182/196 looper letters, 49 selfloop transitions, 23 changer transitions 8/84 dead transitions. [2023-08-03 22:06:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 573 flow [2023-08-03 22:06:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-03 22:06:41,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2023-08-03 22:06:41,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-03 22:06:41,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-03 22:06:41,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:41,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-03 22:06:41,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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 22:06:41,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:41,839 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 274 flow. Second operand 4 states and 440 transitions. [2023-08-03 22:06:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 573 flow [2023-08-03 22:06:41,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:41,841 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 385 flow [2023-08-03 22:06:41,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=385, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2023-08-03 22:06:41,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 22:06:41,842 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 385 flow [2023-08-03 22:06:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 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 22:06:41,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:41,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:41,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 22:06:41,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:41,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 92968613, now seen corresponding path program 1 times [2023-08-03 22:06:41,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:41,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763945961] [2023-08-03 22:06:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:41,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:41,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:41,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763945961] [2023-08-03 22:06:41,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763945961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:41,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 22:06:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410945511] [2023-08-03 22:06:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:06:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:06:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:06:42,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 196 [2023-08-03 22:06:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 100.16666666666667) internal successors, (601), 6 states have internal predecessors, (601), 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 22:06:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 196 [2023-08-03 22:06:42,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:42,168 INFO L124 PetriNetUnfolderBase]: 225/647 cut-off events. [2023-08-03 22:06:42,169 INFO L125 PetriNetUnfolderBase]: For 893/893 co-relation queries the response was YES. [2023-08-03 22:06:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 647 events. 225/647 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3480 event pairs, 66 based on Foata normal form. 145/787 useless extension candidates. Maximal degree in co-relation 1961. Up to 491 conditions per place. [2023-08-03 22:06:42,170 INFO L140 encePairwiseOnDemand]: 190/196 looper letters, 27 selfloop transitions, 9 changer transitions 31/71 dead transitions. [2023-08-03 22:06:42,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 587 flow [2023-08-03 22:06:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-03 22:06:42,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471938775510204 [2023-08-03 22:06:42,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-03 22:06:42,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-03 22:06:42,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:42,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-03 22:06:42,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 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 22:06:42,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:42,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:42,173 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 385 flow. Second operand 4 states and 429 transitions. [2023-08-03 22:06:42,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 587 flow [2023-08-03 22:06:42,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:42,176 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 245 flow [2023-08-03 22:06:42,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2023-08-03 22:06:42,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2023-08-03 22:06:42,178 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 245 flow [2023-08-03 22:06:42,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.16666666666667) internal successors, (601), 6 states have internal predecessors, (601), 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 22:06:42,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:42,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:42,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 22:06:42,178 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:42,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash -579788066, now seen corresponding path program 1 times [2023-08-03 22:06:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:42,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117109760] [2023-08-03 22:06:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:42,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117109760] [2023-08-03 22:06:42,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117109760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:42,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:42,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:42,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120047903] [2023-08-03 22:06:42,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:42,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:42,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:42,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 196 [2023-08-03 22:06:42,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 22:06:42,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:42,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 196 [2023-08-03 22:06:42,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:42,421 INFO L124 PetriNetUnfolderBase]: 79/247 cut-off events. [2023-08-03 22:06:42,421 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2023-08-03 22:06:42,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 247 events. 79/247 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 997 event pairs, 47 based on Foata normal form. 2/248 useless extension candidates. Maximal degree in co-relation 581. Up to 142 conditions per place. [2023-08-03 22:06:42,422 INFO L140 encePairwiseOnDemand]: 190/196 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2023-08-03 22:06:42,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 357 flow [2023-08-03 22:06:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-03 22:06:42,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433673469387755 [2023-08-03 22:06:42,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-03 22:06:42,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-03 22:06:42,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:42,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-03 22:06:42,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:42,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:42,425 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 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 22:06:42,425 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 245 flow. Second operand 4 states and 426 transitions. [2023-08-03 22:06:42,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 357 flow [2023-08-03 22:06:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 22:06:42,427 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-03 22:06:42,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-03 22:06:42,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-03 22:06:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-03 22:06:42,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 22:06:42,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 22:06:42,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 22:06:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 22:06:42,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:42,428 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (2/2) [2023-08-03 22:06:42,428 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:06:42,428 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:06:42,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:06:42 BasicIcfg [2023-08-03 22:06:42,432 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:06:42,432 INFO L158 Benchmark]: Toolchain (without parser) took 10687.41ms. Allocated memory was 610.3MB in the beginning and 763.4MB in the end (delta: 153.1MB). Free memory was 567.3MB in the beginning and 453.3MB in the end (delta: 114.0MB). Peak memory consumption was 268.8MB. Max. memory is 16.0GB. [2023-08-03 22:06:42,432 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 367.0MB. Free memory is still 315.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:06:42,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.92ms. Allocated memory is still 610.3MB. Free memory was 567.0MB in the beginning and 547.4MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 22:06:42,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.63ms. Allocated memory is still 610.3MB. Free memory was 547.4MB in the beginning and 545.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:42,433 INFO L158 Benchmark]: Boogie Preprocessor took 15.16ms. Allocated memory is still 610.3MB. Free memory was 545.3MB in the beginning and 543.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:06:42,433 INFO L158 Benchmark]: RCFGBuilder took 344.84ms. Allocated memory is still 610.3MB. Free memory was 543.9MB in the beginning and 528.9MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-03 22:06:42,433 INFO L158 Benchmark]: TraceAbstraction took 10003.98ms. Allocated memory was 610.3MB in the beginning and 763.4MB in the end (delta: 153.1MB). Free memory was 528.2MB in the beginning and 453.3MB in the end (delta: 74.9MB). Peak memory consumption was 229.0MB. Max. memory is 16.0GB. [2023-08-03 22:06:42,434 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 367.0MB. Free memory is still 315.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 294.92ms. Allocated memory is still 610.3MB. Free memory was 567.0MB in the beginning and 547.4MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.63ms. Allocated memory is still 610.3MB. Free memory was 547.4MB in the beginning and 545.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.16ms. Allocated memory is still 610.3MB. Free memory was 545.3MB in the beginning and 543.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 344.84ms. Allocated memory is still 610.3MB. Free memory was 543.9MB in the beginning and 528.9MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 10003.98ms. Allocated memory was 610.3MB in the beginning and 763.4MB in the end (delta: 153.1MB). Free memory was 528.2MB in the beginning and 453.3MB in the end (delta: 74.9MB). Peak memory consumption was 229.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 64 PlacesBefore, 8 PlacesAfterwards, 61 TransitionsBefore, 5 TransitionsAfterwards, 340 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 207 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 207, independent: 207, independent conditional: 0, independent unconditional: 207, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 170, independent: 170, independent conditional: 0, independent unconditional: 170, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 207, independent: 37, independent conditional: 0, independent unconditional: 37, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 170, unknown conditional: 0, unknown unconditional: 170] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 84 PlacesBefore, 31 PlacesAfterwards, 79 TransitionsBefore, 26 TransitionsAfterwards, 1292 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 55 TotalNumberOfCompositions, 4764 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1485, independent: 1219, independent conditional: 0, independent unconditional: 1219, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 582, independent: 552, independent conditional: 0, independent unconditional: 552, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1485, independent: 667, independent conditional: 0, independent unconditional: 667, dependent: 236, dependent conditional: 0, dependent unconditional: 236, unknown: 582, unknown conditional: 0, unknown unconditional: 582] , Statistics on independence cache: Total cache size (in pairs): 68, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 106 PlacesBefore, 41 PlacesAfterwards, 103 TransitionsBefore, 37 TransitionsAfterwards, 2924 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 71 TotalNumberOfCompositions, 11709 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2704, independent: 2309, independent conditional: 0, independent unconditional: 2309, dependent: 395, dependent conditional: 0, dependent unconditional: 395, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1326, independent: 1267, independent conditional: 0, independent unconditional: 1267, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2704, independent: 1042, independent conditional: 0, independent unconditional: 1042, dependent: 336, dependent conditional: 0, dependent unconditional: 336, unknown: 1326, unknown conditional: 0, unknown unconditional: 1326] , Statistics on independence cache: Total cache size (in pairs): 116, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 120 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 138 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41 IncrementalHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 41 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 138 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 702 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 376 mSDsluCounter, 171 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1291 IncrementalHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 109 mSDtfsCounter, 1291 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=385occurred in iteration=6, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 701 SizeOfPredicates, 0 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 36/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:06:42,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...