/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:34:01,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:34:01,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:34:01,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:34:01,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:34:01,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:34:01,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:34:01,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:34:01,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:34:01,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:34:01,463 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:34:01,464 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:34:01,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:34:01,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:34:01,465 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:34:01,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:34:01,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:34:01,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:34:01,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:34:01,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:34:01,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:34:01,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:34:01,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:34:01,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:34:01,477 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:34:01,478 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:34:01,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:34:01,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:34:01,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:34:01,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:34:01,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:34:01,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:34:01,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:34:01,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:34:01,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:34:01,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:34:01,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:34:01,480 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:34:01,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:34:01,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:34:01,482 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:34:01,482 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:34:01,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:34:01,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:34:01,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:34:01,738 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:34:01,739 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:34:01,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i [2023-08-04 04:34:02,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:34:03,053 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:34:03,054 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i [2023-08-04 04:34:03,068 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c57607881/3c7b32190f4f4215b894833a5d268ec7/FLAG9364ca240 [2023-08-04 04:34:03,087 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c57607881/3c7b32190f4f4215b894833a5d268ec7 [2023-08-04 04:34:03,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:34:03,091 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:34:03,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:34:03,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:34:03,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:34:03,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367e8f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03, skipping insertion in model container [2023-08-04 04:34:03,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,145 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:34:03,291 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_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i[1129,1142] [2023-08-04 04:34:03,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:34:03,485 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:34:03,497 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_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i[1129,1142] [2023-08-04 04:34:03,515 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-04 04:34:03,517 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-04 04:34:03,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:34:03,588 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:34:03,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03 WrapperNode [2023-08-04 04:34:03,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:34:03,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:34:03,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:34:03,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:34:03,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,650 INFO L138 Inliner]: procedures = 162, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-08-04 04:34:03,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:34:03,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:34:03,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:34:03,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:34:03,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,680 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:34:03,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:34:03,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:34:03,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:34:03,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (1/1) ... [2023-08-04 04:34:03,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:34:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:03,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 04:34:03,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 04:34:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:34:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:34:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:34:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:34:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 04:34:03,752 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 04:34:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:34:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:34:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:34:03,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:34:03,754 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:34:03,862 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:34:03,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:34:04,012 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:34:04,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:34:04,018 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-04 04:34:04,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:34:04 BoogieIcfgContainer [2023-08-04 04:34:04,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:34:04,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:34:04,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:34:04,025 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:34:04,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:34:03" (1/3) ... [2023-08-04 04:34:04,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5604d081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:34:04, skipping insertion in model container [2023-08-04 04:34:04,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:03" (2/3) ... [2023-08-04 04:34:04,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5604d081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:34:04, skipping insertion in model container [2023-08-04 04:34:04,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:34:04" (3/3) ... [2023-08-04 04:34:04,027 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_45-traces-per-global-and-current-lock-mine-incomparable_true_bound2.i [2023-08-04 04:34:04,034 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:34:04,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:34:04,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:34:04,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:34:04,089 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:34:04,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 149 flow [2023-08-04 04:34:04,159 INFO L124 PetriNetUnfolderBase]: 4/101 cut-off events. [2023-08-04 04:34:04,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:04,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 4/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 141 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-04 04:34:04,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 72 transitions, 149 flow [2023-08-04 04:34:04,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 125 flow [2023-08-04 04:34:04,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:04,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 125 flow [2023-08-04 04:34:04,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 125 flow [2023-08-04 04:34:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 125 flow [2023-08-04 04:34:04,218 INFO L124 PetriNetUnfolderBase]: 2/80 cut-off events. [2023-08-04 04:34:04,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-08-04 04:34:04,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 480 [2023-08-04 04:34:06,066 INFO L134 LiptonReduction]: Checked pairs total: 1038 [2023-08-04 04:34:06,066 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-04 04:34:06,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:34:06,084 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;@3f4b6b58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:06,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:06,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:06,088 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-04 04:34:06,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:06,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:06,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:06,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:06,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1669448921, now seen corresponding path program 1 times [2023-08-04 04:34:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460103152] [2023-08-04 04:34:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460103152] [2023-08-04 04:34:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460103152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:34:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114570510] [2023-08-04 04:34:06,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:06,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:06,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2023-08-04 04:34:06,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 15 transitions, 33 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:06,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2023-08-04 04:34:06,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:06,400 INFO L124 PetriNetUnfolderBase]: 18/58 cut-off events. [2023-08-04 04:34:06,400 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:06,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 58 events. 18/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 160 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-08-04 04:34:06,403 INFO L140 encePairwiseOnDemand]: 116/119 looper letters, 12 selfloop transitions, 2 changer transitions 1/19 dead transitions. [2023-08-04 04:34:06,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 71 flow [2023-08-04 04:34:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-04 04:34:06,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826330532212886 [2023-08-04 04:34:06,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-04 04:34:06,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-04 04:34:06,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:06,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-04 04:34:06,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,430 INFO L175 Difference]: Start difference. First operand has 18 places, 15 transitions, 33 flow. Second operand 3 states and 208 transitions. [2023-08-04 04:34:06,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 71 flow [2023-08-04 04:34:06,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:06,434 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 41 flow [2023-08-04 04:34:06,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-04 04:34:06,441 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-04 04:34:06,442 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 41 flow [2023-08-04 04:34:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:06,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:34:06,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:06,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2001369437, now seen corresponding path program 1 times [2023-08-04 04:34:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:06,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457352817] [2023-08-04 04:34:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457352817] [2023-08-04 04:34:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457352817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106396461] [2023-08-04 04:34:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:06,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:06,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:34:06,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:34:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:06,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:34:06,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:06,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106396461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:06,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:34:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729478040] [2023-08-04 04:34:06,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:06,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:34:06,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:34:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:34:06,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 119 [2023-08-04 04:34:06,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 41 flow. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:06,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 119 [2023-08-04 04:34:06,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:06,756 INFO L124 PetriNetUnfolderBase]: 6/22 cut-off events. [2023-08-04 04:34:06,756 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 04:34:06,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 22 events. 6/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 44. Up to 14 conditions per place. [2023-08-04 04:34:06,757 INFO L140 encePairwiseOnDemand]: 116/119 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 04:34:06,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 57 flow [2023-08-04 04:34:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:34:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:34:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 264 transitions. [2023-08-04 04:34:06,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546218487394958 [2023-08-04 04:34:06,759 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 264 transitions. [2023-08-04 04:34:06,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 264 transitions. [2023-08-04 04:34:06,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:06,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 264 transitions. [2023-08-04 04:34:06,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,763 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,763 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 41 flow. Second operand 4 states and 264 transitions. [2023-08-04 04:34:06,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 57 flow [2023-08-04 04:34:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 13 transitions, 51 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:34:06,764 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 04:34:06,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 04:34:06,765 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -3 predicate places. [2023-08-04 04:34:06,765 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 04:34:06,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:06,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:34:06,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 04:34:06,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:06,974 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 04:34:06,976 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:34:06,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 149 flow [2023-08-04 04:34:06,992 INFO L124 PetriNetUnfolderBase]: 4/101 cut-off events. [2023-08-04 04:34:06,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:06,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 4/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 141 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-04 04:34:06,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 72 transitions, 149 flow [2023-08-04 04:34:06,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 99 flow [2023-08-04 04:34:06,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:06,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 47 transitions, 99 flow [2023-08-04 04:34:06,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 47 transitions, 99 flow [2023-08-04 04:34:06,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 47 transitions, 99 flow [2023-08-04 04:34:07,005 INFO L124 PetriNetUnfolderBase]: 0/51 cut-off events. [2023-08-04 04:34:07,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:07,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 51 events. 0/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-04 04:34:07,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 200 [2023-08-04 04:34:08,980 INFO L134 LiptonReduction]: Checked pairs total: 157 [2023-08-04 04:34:08,980 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-04 04:34:08,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:34:08,983 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;@3f4b6b58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:08,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:08,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:08,985 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-04 04:34:08,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:08,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:08,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:34:08,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:34:08,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash 8869547, now seen corresponding path program 1 times [2023-08-04 04:34:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110838100] [2023-08-04 04:34:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:34:09,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:34:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:34:09,065 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:34:09,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:34:09,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:34:09,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:34:09,066 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:34:09,067 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:34:09,067 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:34:09,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:34:09,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:34:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 83 transitions, 178 flow [2023-08-04 04:34:09,138 INFO L124 PetriNetUnfolderBase]: 6/146 cut-off events. [2023-08-04 04:34:09,138 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:09,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 6/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-08-04 04:34:09,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 83 transitions, 178 flow [2023-08-04 04:34:09,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 72 transitions, 152 flow [2023-08-04 04:34:09,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:09,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 72 transitions, 152 flow [2023-08-04 04:34:09,140 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 72 transitions, 152 flow [2023-08-04 04:34:09,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 72 transitions, 152 flow [2023-08-04 04:34:09,155 INFO L124 PetriNetUnfolderBase]: 3/115 cut-off events. [2023-08-04 04:34:09,155 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:34:09,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 115 events. 3/115 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 180 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 82. Up to 6 conditions per place. [2023-08-04 04:34:09,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 1180 [2023-08-04 04:34:10,829 INFO L134 LiptonReduction]: Checked pairs total: 3150 [2023-08-04 04:34:10,829 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-04 04:34:10,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:34:10,832 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;@3f4b6b58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:10,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:10,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:10,834 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-04 04:34:10,834 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:34:10,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:10,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:10,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:10,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash -177728645, now seen corresponding path program 1 times [2023-08-04 04:34:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:10,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244665331] [2023-08-04 04:34:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:10,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244665331] [2023-08-04 04:34:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244665331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:10,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:34:10,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303800116] [2023-08-04 04:34:10,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:10,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:10,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:10,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 134 [2023-08-04 04:34:10,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:10,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:10,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 134 [2023-08-04 04:34:10,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:10,979 INFO L124 PetriNetUnfolderBase]: 219/448 cut-off events. [2023-08-04 04:34:10,979 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 04:34:10,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 448 events. 219/448 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2165 event pairs, 96 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 200. Up to 384 conditions per place. [2023-08-04 04:34:10,982 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 19 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-04 04:34:10,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 104 flow [2023-08-04 04:34:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-04 04:34:10,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069651741293532 [2023-08-04 04:34:10,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-04 04:34:10,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-04 04:34:10,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:10,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-04 04:34:10,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:10,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:10,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:10,988 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 52 flow. Second operand 3 states and 244 transitions. [2023-08-04 04:34:10,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 104 flow [2023-08-04 04:34:10,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:10,989 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 64 flow [2023-08-04 04:34:10,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-04 04:34:10,990 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-04 04:34:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 64 flow [2023-08-04 04:34:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:10,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:10,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:34:10,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:10,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -170094186, now seen corresponding path program 1 times [2023-08-04 04:34:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:10,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526253196] [2023-08-04 04:34:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526253196] [2023-08-04 04:34:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526253196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865137412] [2023-08-04 04:34:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:11,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:11,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:34:11,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:34:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:11,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:34:11,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:11,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:11,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865137412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:11,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:11,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:34:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263834486] [2023-08-04 04:34:11,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:11,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:34:11,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:34:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:34:11,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 134 [2023-08-04 04:34:11,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:11,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 134 [2023-08-04 04:34:11,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:11,251 INFO L124 PetriNetUnfolderBase]: 207/416 cut-off events. [2023-08-04 04:34:11,251 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-04 04:34:11,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 416 events. 207/416 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1922 event pairs, 16 based on Foata normal form. 4/420 useless extension candidates. Maximal degree in co-relation 222. Up to 256 conditions per place. [2023-08-04 04:34:11,255 INFO L140 encePairwiseOnDemand]: 130/134 looper letters, 25 selfloop transitions, 3 changer transitions 1/35 dead transitions. [2023-08-04 04:34:11,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 146 flow [2023-08-04 04:34:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:34:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:34:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2023-08-04 04:34:11,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007462686567164 [2023-08-04 04:34:11,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 322 transitions. [2023-08-04 04:34:11,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 322 transitions. [2023-08-04 04:34:11,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:11,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 322 transitions. [2023-08-04 04:34:11,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,260 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 4 states and 322 transitions. [2023-08-04 04:34:11,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 146 flow [2023-08-04 04:34:11,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:11,263 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 76 flow [2023-08-04 04:34:11,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-04 04:34:11,266 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-04 04:34:11,267 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 76 flow [2023-08-04 04:34:11,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:11,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:11,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:34:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:11,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:11,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash 564328754, now seen corresponding path program 1 times [2023-08-04 04:34:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088775033] [2023-08-04 04:34:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088775033] [2023-08-04 04:34:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088775033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:11,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:11,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:34:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674406828] [2023-08-04 04:34:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:11,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 134 [2023-08-04 04:34:11,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:11,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 134 [2023-08-04 04:34:11,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:11,610 INFO L124 PetriNetUnfolderBase]: 216/472 cut-off events. [2023-08-04 04:34:11,610 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-04 04:34:11,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 472 events. 216/472 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2319 event pairs, 180 based on Foata normal form. 25/490 useless extension candidates. Maximal degree in co-relation 237. Up to 336 conditions per place. [2023-08-04 04:34:11,613 INFO L140 encePairwiseOnDemand]: 130/134 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 04:34:11,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 144 flow [2023-08-04 04:34:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-04 04:34:11,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169154228855721 [2023-08-04 04:34:11,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-04 04:34:11,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-04 04:34:11,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:11,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-04 04:34:11,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,617 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 76 flow. Second operand 3 states and 248 transitions. [2023-08-04 04:34:11,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 144 flow [2023-08-04 04:34:11,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 137 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 04:34:11,619 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 88 flow [2023-08-04 04:34:11,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-04 04:34:11,620 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-04 04:34:11,620 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 88 flow [2023-08-04 04:34:11,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:11,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:34:11,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:11,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 208889429, now seen corresponding path program 1 times [2023-08-04 04:34:11,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:11,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152903147] [2023-08-04 04:34:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:34:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152903147] [2023-08-04 04:34:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152903147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:11,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:11,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:34:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524394791] [2023-08-04 04:34:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:11,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 134 [2023-08-04 04:34:11,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:11,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 134 [2023-08-04 04:34:11,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:11,788 INFO L124 PetriNetUnfolderBase]: 229/507 cut-off events. [2023-08-04 04:34:11,788 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2023-08-04 04:34:11,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 507 events. 229/507 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2491 event pairs, 109 based on Foata normal form. 47/552 useless extension candidates. Maximal degree in co-relation 634. Up to 287 conditions per place. [2023-08-04 04:34:11,791 INFO L140 encePairwiseOnDemand]: 126/134 looper letters, 29 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-04 04:34:11,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 217 flow [2023-08-04 04:34:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-04 04:34:11,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895522388059702 [2023-08-04 04:34:11,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-04 04:34:11,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-04 04:34:11,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:11,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-04 04:34:11,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,796 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 88 flow. Second operand 3 states and 237 transitions. [2023-08-04 04:34:11,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 217 flow [2023-08-04 04:34:11,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:11,798 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 129 flow [2023-08-04 04:34:11,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-04 04:34:11,799 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-04 04:34:11,799 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 129 flow [2023-08-04 04:34:11,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:11,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:11,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 04:34:11,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:11,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -120017285, now seen corresponding path program 2 times [2023-08-04 04:34:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720820118] [2023-08-04 04:34:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:34:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720820118] [2023-08-04 04:34:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720820118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:11,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:11,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:34:11,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246653431] [2023-08-04 04:34:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:11,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:34:11,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:34:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:34:11,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 134 [2023-08-04 04:34:11,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:11,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:11,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 134 [2023-08-04 04:34:11,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:12,048 INFO L124 PetriNetUnfolderBase]: 37/174 cut-off events. [2023-08-04 04:34:12,048 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-08-04 04:34:12,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 174 events. 37/174 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 751 event pairs, 10 based on Foata normal form. 66/240 useless extension candidates. Maximal degree in co-relation 296. Up to 98 conditions per place. [2023-08-04 04:34:12,050 INFO L140 encePairwiseOnDemand]: 126/134 looper letters, 17 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2023-08-04 04:34:12,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 207 flow [2023-08-04 04:34:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:34:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:34:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 298 transitions. [2023-08-04 04:34:12,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559701492537313 [2023-08-04 04:34:12,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 298 transitions. [2023-08-04 04:34:12,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 298 transitions. [2023-08-04 04:34:12,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:12,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 298 transitions. [2023-08-04 04:34:12,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,055 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,055 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 129 flow. Second operand 4 states and 298 transitions. [2023-08-04 04:34:12,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 207 flow [2023-08-04 04:34:12,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:12,060 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 135 flow [2023-08-04 04:34:12,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-04 04:34:12,061 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2023-08-04 04:34:12,062 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 135 flow [2023-08-04 04:34:12,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:12,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:34:12,062 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:12,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1441856153, now seen corresponding path program 1 times [2023-08-04 04:34:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:12,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012765745] [2023-08-04 04:34:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:12,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012765745] [2023-08-04 04:34:12,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012765745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:12,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:12,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:34:12,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120707744] [2023-08-04 04:34:12,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:34:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:12,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:34:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:34:12,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 134 [2023-08-04 04:34:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 134 [2023-08-04 04:34:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:12,337 INFO L124 PetriNetUnfolderBase]: 39/146 cut-off events. [2023-08-04 04:34:12,338 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-08-04 04:34:12,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 146 events. 39/146 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 553 event pairs, 22 based on Foata normal form. 6/152 useless extension candidates. Maximal degree in co-relation 251. Up to 64 conditions per place. [2023-08-04 04:34:12,338 INFO L140 encePairwiseOnDemand]: 128/134 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2023-08-04 04:34:12,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 204 flow [2023-08-04 04:34:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:34:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:34:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2023-08-04 04:34:12,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708955223880597 [2023-08-04 04:34:12,340 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2023-08-04 04:34:12,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2023-08-04 04:34:12,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:12,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2023-08-04 04:34:12,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,343 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 135 flow. Second operand 4 states and 306 transitions. [2023-08-04 04:34:12,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 204 flow [2023-08-04 04:34:12,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 186 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 04:34:12,344 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-04 04:34:12,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=37, PETRI_TRANSITIONS=0} [2023-08-04 04:34:12,345 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-04 04:34:12,345 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-04 04:34:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:12,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:34:12,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:34:12,346 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-04 04:34:12,346 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:34:12,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 83 transitions, 178 flow [2023-08-04 04:34:12,358 INFO L124 PetriNetUnfolderBase]: 6/146 cut-off events. [2023-08-04 04:34:12,359 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:12,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 6/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-08-04 04:34:12,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 83 transitions, 178 flow [2023-08-04 04:34:12,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 58 transitions, 128 flow [2023-08-04 04:34:12,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:12,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 58 transitions, 128 flow [2023-08-04 04:34:12,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 58 transitions, 128 flow [2023-08-04 04:34:12,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 58 transitions, 128 flow [2023-08-04 04:34:12,366 INFO L124 PetriNetUnfolderBase]: 0/71 cut-off events. [2023-08-04 04:34:12,366 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 0/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-04 04:34:12,367 INFO L119 LiptonReduction]: Number of co-enabled transitions 620 [2023-08-04 04:34:14,364 INFO L134 LiptonReduction]: Checked pairs total: 1582 [2023-08-04 04:34:14,365 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-04 04:34:14,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:34:14,366 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;@3f4b6b58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:14,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:14,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:14,368 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 04:34:14,368 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:14,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:14,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-04 04:34:14,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:34:14,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1798056481, now seen corresponding path program 1 times [2023-08-04 04:34:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:14,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418360547] [2023-08-04 04:34:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:14,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418360547] [2023-08-04 04:34:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418360547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:14,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:14,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:34:14,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251124726] [2023-08-04 04:34:14,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:14,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:34:14,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:34:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:34:14,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 127 [2023-08-04 04:34:14,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 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) [2023-08-04 04:34:14,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:14,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 127 [2023-08-04 04:34:14,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:14,442 INFO L124 PetriNetUnfolderBase]: 18/58 cut-off events. [2023-08-04 04:34:14,442 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 04:34:14,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 58 events. 18/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 154 event pairs, 0 based on Foata normal form. 20/78 useless extension candidates. Maximal degree in co-relation 29. Up to 42 conditions per place. [2023-08-04 04:34:14,442 INFO L140 encePairwiseOnDemand]: 125/127 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 04:34:14,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 72 flow [2023-08-04 04:34:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:34:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:34:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-04 04:34:14,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122047244094488 [2023-08-04 04:34:14,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-04 04:34:14,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-04 04:34:14,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:14,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-04 04:34:14,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:14,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:14,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:34:14,446 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 4 states and 311 transitions. [2023-08-04 04:34:14,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 72 flow [2023-08-04 04:34:14,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:14,447 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 04:34:14,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 04:34:14,448 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-04 04:34:14,448 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 04:34:14,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 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) [2023-08-04 04:34:14,448 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:34:14,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 04:34:14,449 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:34:14,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 04:34:14,449 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 04:34:14,449 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 04:34:14,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 04:34:14 BasicIcfg [2023-08-04 04:34:14,454 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 04:34:14,455 INFO L158 Benchmark]: Toolchain (without parser) took 11363.89ms. Allocated memory was 587.2MB in the beginning and 704.6MB in the end (delta: 117.4MB). Free memory was 533.2MB in the beginning and 416.6MB in the end (delta: 116.6MB). Peak memory consumption was 235.8MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,455 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 367.0MB. Free memory was 312.3MB in the beginning and 312.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:34:14,455 INFO L158 Benchmark]: CACSL2BoogieTranslator took 498.29ms. Allocated memory is still 587.2MB. Free memory was 533.2MB in the beginning and 514.0MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,455 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.02ms. Allocated memory is still 587.2MB. Free memory was 514.0MB in the beginning and 511.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,455 INFO L158 Benchmark]: Boogie Preprocessor took 41.80ms. Allocated memory is still 587.2MB. Free memory was 511.9MB in the beginning and 510.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,456 INFO L158 Benchmark]: RCFGBuilder took 326.90ms. Allocated memory is still 587.2MB. Free memory was 510.4MB in the beginning and 497.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,456 INFO L158 Benchmark]: TraceAbstraction took 10432.16ms. Allocated memory was 587.2MB in the beginning and 704.6MB in the end (delta: 117.4MB). Free memory was 496.8MB in the beginning and 416.6MB in the end (delta: 80.2MB). Peak memory consumption was 200.1MB. Max. memory is 16.0GB. [2023-08-04 04:34:14,457 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 367.0MB. Free memory was 312.3MB in the beginning and 312.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 498.29ms. Allocated memory is still 587.2MB. Free memory was 533.2MB in the beginning and 514.0MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.02ms. Allocated memory is still 587.2MB. Free memory was 514.0MB in the beginning and 511.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 41.80ms. Allocated memory is still 587.2MB. Free memory was 511.9MB in the beginning and 510.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 326.90ms. Allocated memory is still 587.2MB. Free memory was 510.4MB in the beginning and 497.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10432.16ms. Allocated memory was 587.2MB in the beginning and 704.6MB in the end (delta: 117.4MB). Free memory was 496.8MB in the beginning and 416.6MB in the end (delta: 80.2MB). Peak memory consumption was 200.1MB. 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: 1.9s, 63 PlacesBefore, 18 PlacesAfterwards, 61 TransitionsBefore, 15 TransitionsAfterwards, 480 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 47 TotalNumberOfCompositions, 1038 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 462, independent: 365, independent conditional: 0, independent unconditional: 365, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 235, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 462, independent: 149, independent conditional: 0, independent unconditional: 149, dependent: 78, dependent conditional: 0, dependent unconditional: 78, unknown: 235, unknown conditional: 0, unknown unconditional: 235] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 50 PlacesBefore, 8 PlacesAfterwards, 47 TransitionsBefore, 5 TransitionsAfterwards, 200 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 157 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 157, independent: 157, independent conditional: 0, independent unconditional: 157, 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: 101, independent: 101, independent conditional: 0, independent unconditional: 101, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 157, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 101, unknown conditional: 0, unknown unconditional: 101] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, 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: 1.7s, 76 PlacesBefore, 27 PlacesAfterwards, 72 TransitionsBefore, 22 TransitionsAfterwards, 1180 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 51 TotalNumberOfCompositions, 3150 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1215, independent: 1050, independent conditional: 0, independent unconditional: 1050, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 560, independent: 530, independent conditional: 0, independent unconditional: 530, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1215, independent: 520, independent conditional: 0, independent unconditional: 520, dependent: 135, dependent conditional: 0, dependent unconditional: 135, unknown: 560, unknown conditional: 0, unknown unconditional: 560] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, 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: 2.0s, 63 PlacesBefore, 21 PlacesAfterwards, 58 TransitionsBefore, 16 TransitionsAfterwards, 620 CoEnabledTransitionPairs, 7 FixpointIterations, 26 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 0 ChoiceCompositions, 44 TotalNumberOfCompositions, 1582 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 842, independent: 726, independent conditional: 0, independent unconditional: 726, dependent: 116, dependent conditional: 0, dependent unconditional: 116, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 323, independent: 307, independent conditional: 0, independent unconditional: 307, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 842, independent: 419, independent conditional: 0, independent unconditional: 419, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 323, unknown conditional: 0, unknown unconditional: 323] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 82 locations, 2 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: 2.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 58 IncrementalHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 2 mSDtfsCounter, 58 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=1, InterpolantAutomatonStates: 7, 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, 0.3s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 59 SizeOfPredicates, 0 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 2 thread instances CFG has 4 procedures, 93 locations, 2 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: 3.3s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 255 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 130 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 424 IncrementalHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 1 mSDtfsCounter, 424 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=5, InterpolantAutomatonStates: 21, 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, 0.5s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 127 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 24/27 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 1 thread instances CFG has 3 procedures, 82 locations, 2 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: 2.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, 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, 93 locations, 2 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: 2.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35 IncrementalHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 35 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=44occurred 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, 0.0s 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 04:34:14,477 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...