/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/added_bound_to_unbounded/goblint-regression_28-race_reach_60-invariant_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:51:13,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:51:13,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:51:13,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:51:13,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:51:13,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:51:13,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:51:13,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:51:13,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:51:13,247 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:51:13,248 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:51:13,248 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:51:13,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:51:13,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:51:13,250 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:51:13,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:51:13,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:51:13,251 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:51:13,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:51:13,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:51:13,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:51:13,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:51:13,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:51:13,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:51:13,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:51:13,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:51:13,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:51:13,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:51:13,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:51:13,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:51:13,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:51:13,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:51:13,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:51:13,256 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:51:13,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 03:51:13,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:51:13,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:51:13,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:51:13,499 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:51:13,499 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:51:13,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_60-invariant_racefree_bound2.i [2023-08-04 03:51:14,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:51:14,899 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:51:14,899 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_60-invariant_racefree_bound2.i [2023-08-04 03:51:14,913 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d30bd7ae/277c64c27dbe4c9bb097a1f4be7bb7b5/FLAGabf9dbe92 [2023-08-04 03:51:14,924 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d30bd7ae/277c64c27dbe4c9bb097a1f4be7bb7b5 [2023-08-04 03:51:14,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:51:14,927 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:51:14,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:51:14,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:51:14,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:51:14,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:51:14" (1/1) ... [2023-08-04 03:51:14,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434bacda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:14, skipping insertion in model container [2023-08-04 03:51:14,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:51:14" (1/1) ... [2023-08-04 03:51:14,975 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:51:15,235 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_60-invariant_racefree_bound2.i[30176,30189] [2023-08-04 03:51:15,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:51:15,270 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:51:15,298 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:51:15,300 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:51:15,319 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_60-invariant_racefree_bound2.i[30176,30189] [2023-08-04 03:51:15,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:51:15,365 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:51:15,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15 WrapperNode [2023-08-04 03:51:15,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:51:15,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:51:15,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:51:15,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:51:15,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,412 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-08-04 03:51:15,413 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:51:15,414 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:51:15,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:51:15,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:51:15,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:51:15,465 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:51:15,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:51:15,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:51:15,466 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (1/1) ... [2023-08-04 03:51:15,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:51:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:51:15,490 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 03:51:15,491 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 03:51:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:51:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:51:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 03:51:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:51:15,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:51:15,518 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 03:51:15,518 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 03:51:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:51:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:51:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:51:15,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:51:15,521 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 03:51:15,641 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:51:15,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:51:15,805 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:51:15,812 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:51:15,813 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-04 03:51:15,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:51:15 BoogieIcfgContainer [2023-08-04 03:51:15,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:51:15,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:51:15,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:51:15,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:51:15,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:51:14" (1/3) ... [2023-08-04 03:51:15,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773b4840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:51:15, skipping insertion in model container [2023-08-04 03:51:15,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:51:15" (2/3) ... [2023-08-04 03:51:15,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773b4840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:51:15, skipping insertion in model container [2023-08-04 03:51:15,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:51:15" (3/3) ... [2023-08-04 03:51:15,822 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_60-invariant_racefree_bound2.i [2023-08-04 03:51:15,828 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:51:15,835 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:51:15,835 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 03:51:15,836 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:51:15,898 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-04 03:51:15,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-08-04 03:51:15,989 INFO L124 PetriNetUnfolderBase]: 33/193 cut-off events. [2023-08-04 03:51:15,989 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:51:15,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-04 03:51:15,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-08-04 03:51:16,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:16,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:51:16,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:16,031 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:16,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:16,067 INFO L124 PetriNetUnfolderBase]: 32/188 cut-off events. [2023-08-04 03:51:16,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-04 03:51:16,073 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-08-04 03:51:18,341 INFO L134 LiptonReduction]: Checked pairs total: 14551 [2023-08-04 03:51:18,341 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 03:51:18,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:51:18,358 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;@624b9acb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:51:18,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:51:18,363 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:51:18,363 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 03:51:18,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:18,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:18,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:51:18,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:51:18,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash 512707676, now seen corresponding path program 1 times [2023-08-04 03:51:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554241224] [2023-08-04 03:51:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:18,534 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 03:51:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:18,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554241224] [2023-08-04 03:51:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554241224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:18,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:51:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171397348] [2023-08-04 03:51:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:18,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:51:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:51:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:51:18,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 235 [2023-08-04 03:51:18,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 62 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 03:51:18,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:18,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 235 [2023-08-04 03:51:18,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:18,751 INFO L124 PetriNetUnfolderBase]: 211/547 cut-off events. [2023-08-04 03:51:18,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 547 events. 211/547 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2758 event pairs, 0 based on Foata normal form. 88/558 useless extension candidates. Maximal degree in co-relation 964. Up to 421 conditions per place. [2023-08-04 03:51:18,762 INFO L140 encePairwiseOnDemand]: 213/235 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 03:51:18,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 215 flow [2023-08-04 03:51:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:51:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:51:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-04 03:51:18,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758865248226951 [2023-08-04 03:51:18,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-04 03:51:18,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-04 03:51:18,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:18,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-04 03:51:18,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 03:51:18,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:51:18,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:51:18,789 INFO L175 Difference]: Start difference. First operand has 46 places, 62 transitions, 129 flow. Second operand 3 states and 406 transitions. [2023-08-04 03:51:18,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 215 flow [2023-08-04 03:51:18,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:51:18,793 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 97 flow [2023-08-04 03:51:18,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-04 03:51:18,798 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 03:51:18,798 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 97 flow [2023-08-04 03:51:18,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 03:51:18,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:18,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:18,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:51:18,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:51:18,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1308553740, now seen corresponding path program 1 times [2023-08-04 03:51:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:18,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145062817] [2023-08-04 03:51:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:18,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:18,942 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 03:51:18,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:18,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145062817] [2023-08-04 03:51:18,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145062817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:18,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:18,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:51:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846160827] [2023-08-04 03:51:18,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:51:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:51:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:51:18,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2023-08-04 03:51:18,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 03:51:18,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:18,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2023-08-04 03:51:18,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:19,070 INFO L124 PetriNetUnfolderBase]: 210/518 cut-off events. [2023-08-04 03:51:19,071 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 03:51:19,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 518 events. 210/518 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2541 event pairs, 104 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 998. Up to 317 conditions per place. [2023-08-04 03:51:19,073 INFO L140 encePairwiseOnDemand]: 227/235 looper letters, 37 selfloop transitions, 4 changer transitions 6/56 dead transitions. [2023-08-04 03:51:19,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 217 flow [2023-08-04 03:51:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:51:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:51:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 03:51:19,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526241134751773 [2023-08-04 03:51:19,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 03:51:19,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 03:51:19,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:19,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 03:51:19,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 03:51:19,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:51:19,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:51:19,088 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 97 flow. Second operand 3 states and 371 transitions. [2023-08-04 03:51:19,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 217 flow [2023-08-04 03:51:19,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:51:19,090 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 121 flow [2023-08-04 03:51:19,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-04 03:51:19,094 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 03:51:19,097 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 121 flow [2023-08-04 03:51:19,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 03:51:19,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:19,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:51:19,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:51:19,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:19,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1926413753, now seen corresponding path program 1 times [2023-08-04 03:51:19,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:19,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204177102] [2023-08-04 03:51:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:19,217 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 03:51:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204177102] [2023-08-04 03:51:19,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204177102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:51:19,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262133081] [2023-08-04 03:51:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:19,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:51:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:51:19,225 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 03:51:19,253 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 03:51:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:19,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:51:19,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:51:19,388 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 03:51:19,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:51:19,410 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 03:51:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262133081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:51:19,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:51:19,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 03:51:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280021149] [2023-08-04 03:51:19,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:51:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:51:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:51:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:51:19,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 235 [2023-08-04 03:51:19,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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 03:51:19,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:19,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 235 [2023-08-04 03:51:19,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:19,452 INFO L124 PetriNetUnfolderBase]: 12/35 cut-off events. [2023-08-04 03:51:19,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:51:19,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 35 events. 12/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 7/42 useless extension candidates. Maximal degree in co-relation 80. Up to 26 conditions per place. [2023-08-04 03:51:19,452 INFO L140 encePairwiseOnDemand]: 232/235 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-04 03:51:19,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 81 flow [2023-08-04 03:51:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:51:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:51:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-04 03:51:19,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829787234042553 [2023-08-04 03:51:19,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-04 03:51:19,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-04 03:51:19,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:19,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-04 03:51:19,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 03:51:19,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 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 03:51:19,458 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 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 03:51:19,459 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 121 flow. Second operand 4 states and 454 transitions. [2023-08-04 03:51:19,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 81 flow [2023-08-04 03:51:19,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 72 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-04 03:51:19,459 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-04 03:51:19,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-04 03:51:19,460 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -29 predicate places. [2023-08-04 03:51:19,460 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-04 03:51:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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 03:51:19,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 03:51:19,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 03:51:19,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 03:51:19,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:51:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:51:19,674 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 03:51:19,676 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:51:19,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-08-04 03:51:19,705 INFO L124 PetriNetUnfolderBase]: 33/193 cut-off events. [2023-08-04 03:51:19,705 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:51:19,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-04 03:51:19,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-08-04 03:51:19,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:19,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:51:19,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:19,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:19,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-08-04 03:51:19,721 INFO L124 PetriNetUnfolderBase]: 32/188 cut-off events. [2023-08-04 03:51:19,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:19,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-08-04 03:51:19,724 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-08-04 03:51:21,846 INFO L134 LiptonReduction]: Checked pairs total: 14481 [2023-08-04 03:51:21,846 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 03:51:21,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:51:21,849 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;@624b9acb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:51:21,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:51:21,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:51:21,853 INFO L124 PetriNetUnfolderBase]: 8/41 cut-off events. [2023-08-04 03:51:21,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:21,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:21,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:51:21,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:51:21,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1580414617, now seen corresponding path program 1 times [2023-08-04 03:51:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139793699] [2023-08-04 03:51:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:51:21,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:51:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:51:21,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:51:21,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:51:21,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:51:21,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:51:21,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:51:21,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 03:51:21,894 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:51:21,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:51:21,913 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-04 03:51:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,946 INFO L124 PetriNetUnfolderBase]: 57/319 cut-off events. [2023-08-04 03:51:21,947 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:51:21,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-04 03:51:21,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:51:21,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:21,982 INFO L124 PetriNetUnfolderBase]: 57/319 cut-off events. [2023-08-04 03:51:21,982 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:51:21,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-04 03:51:21,995 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-08-04 03:51:24,392 INFO L134 LiptonReduction]: Checked pairs total: 45797 [2023-08-04 03:51:24,392 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-04 03:51:24,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:51:24,395 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;@624b9acb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:51:24,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 03:51:24,398 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:51:24,398 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-04 03:51:24,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:51:24,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:24,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:51:24,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 03:51:24,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 945798373, now seen corresponding path program 1 times [2023-08-04 03:51:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331340262] [2023-08-04 03:51:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:24,425 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 03:51:24,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:24,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331340262] [2023-08-04 03:51:24,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331340262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:24,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:24,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:51:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687988772] [2023-08-04 03:51:24,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:51:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:51:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:51:24,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 310 [2023-08-04 03:51:24,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 03:51:24,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:24,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 310 [2023-08-04 03:51:24,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:25,155 INFO L124 PetriNetUnfolderBase]: 5106/8979 cut-off events. [2023-08-04 03:51:25,156 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 03:51:25,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 8979 events. 5106/8979 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 67707 event pairs, 2208 based on Foata normal form. 1727/9079 useless extension candidates. Maximal degree in co-relation 2572. Up to 7850 conditions per place. [2023-08-04 03:51:25,199 INFO L140 encePairwiseOnDemand]: 281/310 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 03:51:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 304 flow [2023-08-04 03:51:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:51:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:51:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-04 03:51:25,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709677419354838 [2023-08-04 03:51:25,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-04 03:51:25,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-04 03:51:25,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:25,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-04 03:51:25,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 03:51:25,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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 03:51:25,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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 03:51:25,206 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 3 states and 531 transitions. [2023-08-04 03:51:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 304 flow [2023-08-04 03:51:25,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:51:25,212 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-08-04 03:51:25,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-08-04 03:51:25,216 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-04 03:51:25,216 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-08-04 03:51:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 03:51:25,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:25,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 03:51:25,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 03:51:25,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1876051564, now seen corresponding path program 1 times [2023-08-04 03:51:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:25,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868094160] [2023-08-04 03:51:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:25,293 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 03:51:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868094160] [2023-08-04 03:51:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868094160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:25,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:25,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:51:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662591771] [2023-08-04 03:51:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:51:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:51:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:51:25,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 310 [2023-08-04 03:51:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 03:51:25,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:25,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 310 [2023-08-04 03:51:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:26,192 INFO L124 PetriNetUnfolderBase]: 7094/12509 cut-off events. [2023-08-04 03:51:26,192 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-08-04 03:51:26,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24099 conditions, 12509 events. 7094/12509 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 96959 event pairs, 3492 based on Foata normal form. 0/10628 useless extension candidates. Maximal degree in co-relation 24053. Up to 7633 conditions per place. [2023-08-04 03:51:26,258 INFO L140 encePairwiseOnDemand]: 293/310 looper letters, 78 selfloop transitions, 10 changer transitions 1/106 dead transitions. [2023-08-04 03:51:26,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 422 flow [2023-08-04 03:51:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:51:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:51:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-04 03:51:26,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546236559139785 [2023-08-04 03:51:26,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-04 03:51:26,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-04 03:51:26,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:26,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-04 03:51:26,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 03:51:26,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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 03:51:26,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 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 03:51:26,265 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 3 states and 508 transitions. [2023-08-04 03:51:26,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 422 flow [2023-08-04 03:51:26,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:51:26,269 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 246 flow [2023-08-04 03:51:26,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-04 03:51:26,271 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 03:51:26,271 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 246 flow [2023-08-04 03:51:26,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 03:51:26,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:26,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:51:26,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 03:51:26,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1266956077, now seen corresponding path program 1 times [2023-08-04 03:51:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075231956] [2023-08-04 03:51:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:26,335 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 03:51:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075231956] [2023-08-04 03:51:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075231956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:51:26,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853361109] [2023-08-04 03:51:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:51:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:51:26,337 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 03:51:26,373 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 03:51:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:26,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:51:26,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:51:26,422 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 03:51:26,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:51:26,441 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 03:51:26,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853361109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:51:26,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:51:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:51:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72296392] [2023-08-04 03:51:26,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:51:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:51:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:51:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:51:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-08-04 03:51:26,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 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 03:51:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-08-04 03:51:26,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:27,278 INFO L124 PetriNetUnfolderBase]: 6288/11280 cut-off events. [2023-08-04 03:51:27,279 INFO L125 PetriNetUnfolderBase]: For 3322/3779 co-relation queries the response was YES. [2023-08-04 03:51:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25131 conditions, 11280 events. 6288/11280 cut-off events. For 3322/3779 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 88098 event pairs, 3729 based on Foata normal form. 166/10291 useless extension candidates. Maximal degree in co-relation 19987. Up to 9712 conditions per place. [2023-08-04 03:51:27,341 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 62 selfloop transitions, 3 changer transitions 1/91 dead transitions. [2023-08-04 03:51:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 412 flow [2023-08-04 03:51:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:51:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:51:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 638 transitions. [2023-08-04 03:51:27,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145161290322581 [2023-08-04 03:51:27,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 638 transitions. [2023-08-04 03:51:27,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 638 transitions. [2023-08-04 03:51:27,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:27,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 638 transitions. [2023-08-04 03:51:27,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 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 03:51:27,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 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 03:51:27,349 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 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 03:51:27,349 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 246 flow. Second operand 4 states and 638 transitions. [2023-08-04 03:51:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 412 flow [2023-08-04 03:51:27,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 390 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:51:27,371 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 238 flow [2023-08-04 03:51:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-08-04 03:51:27,373 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 7 predicate places. [2023-08-04 03:51:27,373 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 238 flow [2023-08-04 03:51:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 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 03:51:27,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:27,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:27,379 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 03:51:27,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-04 03:51:27,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 03:51:27,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 236354079, now seen corresponding path program 1 times [2023-08-04 03:51:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:27,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404905727] [2023-08-04 03:51:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:51:27,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:27,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404905727] [2023-08-04 03:51:27,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404905727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:27,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:27,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:51:27,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209934003] [2023-08-04 03:51:27,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:27,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:51:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:51:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:51:27,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 310 [2023-08-04 03:51:27,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 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 03:51:27,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:27,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 310 [2023-08-04 03:51:27,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:28,053 INFO L124 PetriNetUnfolderBase]: 1158/2437 cut-off events. [2023-08-04 03:51:28,053 INFO L125 PetriNetUnfolderBase]: For 481/494 co-relation queries the response was YES. [2023-08-04 03:51:28,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5113 conditions, 2437 events. 1158/2437 cut-off events. For 481/494 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15820 event pairs, 504 based on Foata normal form. 98/2119 useless extension candidates. Maximal degree in co-relation 4341. Up to 1110 conditions per place. [2023-08-04 03:51:28,060 INFO L140 encePairwiseOnDemand]: 301/310 looper letters, 54 selfloop transitions, 9 changer transitions 13/99 dead transitions. [2023-08-04 03:51:28,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 99 transitions, 462 flow [2023-08-04 03:51:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:51:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:51:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-08-04 03:51:28,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056451612903226 [2023-08-04 03:51:28,063 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-08-04 03:51:28,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-08-04 03:51:28,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:28,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-08-04 03:51:28,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 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 03:51:28,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 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 03:51:28,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 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 03:51:28,068 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 238 flow. Second operand 4 states and 627 transitions. [2023-08-04 03:51:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 99 transitions, 462 flow [2023-08-04 03:51:28,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 442 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-04 03:51:28,071 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 228 flow [2023-08-04 03:51:28,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-08-04 03:51:28,072 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 7 predicate places. [2023-08-04 03:51:28,072 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 228 flow [2023-08-04 03:51:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 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 03:51:28,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:28,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:51:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 03:51:28,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 03:51:28,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1976854016, now seen corresponding path program 1 times [2023-08-04 03:51:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800446253] [2023-08-04 03:51:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:28,188 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 03:51:28,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800446253] [2023-08-04 03:51:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800446253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:28,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:51:28,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 03:51:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804168560] [2023-08-04 03:51:28,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:28,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 03:51:28,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 03:51:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:51:28,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 310 [2023-08-04 03:51:28,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 228 flow. Second operand has 6 states, 6 states have (on average 135.5) internal successors, (813), 6 states have internal predecessors, (813), 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 03:51:28,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:28,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 310 [2023-08-04 03:51:28,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:28,353 INFO L124 PetriNetUnfolderBase]: 142/458 cut-off events. [2023-08-04 03:51:28,353 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-08-04 03:51:28,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 458 events. 142/458 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2016 event pairs, 128 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 518. Up to 378 conditions per place. [2023-08-04 03:51:28,354 INFO L140 encePairwiseOnDemand]: 301/310 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2023-08-04 03:51:28,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 42 transitions, 208 flow [2023-08-04 03:51:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 03:51:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 03:51:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 966 transitions. [2023-08-04 03:51:28,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2023-08-04 03:51:28,358 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 966 transitions. [2023-08-04 03:51:28,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 966 transitions. [2023-08-04 03:51:28,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:28,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 966 transitions. [2023-08-04 03:51:28,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.0) internal successors, (966), 7 states have internal predecessors, (966), 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 03:51:28,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 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 03:51:28,364 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 310.0) internal successors, (2480), 8 states have internal predecessors, (2480), 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 03:51:28,365 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 228 flow. Second operand 7 states and 966 transitions. [2023-08-04 03:51:28,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 42 transitions, 208 flow [2023-08-04 03:51:28,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 199 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 03:51:28,366 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-04 03:51:28,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-04 03:51:28,367 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -16 predicate places. [2023-08-04 03:51:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-04 03:51:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.5) internal successors, (813), 6 states have internal predecessors, (813), 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 03:51:28,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 03:51:28,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 03:51:28,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 03:51:28,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 03:51:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:51:28,368 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 03:51:28,369 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 03:51:28,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,397 INFO L124 PetriNetUnfolderBase]: 57/319 cut-off events. [2023-08-04 03:51:28,398 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:51:28,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-04 03:51:28,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:51:28,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-08-04 03:51:28,426 INFO L124 PetriNetUnfolderBase]: 57/319 cut-off events. [2023-08-04 03:51:28,426 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:51:28,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-08-04 03:51:28,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-08-04 03:51:30,738 INFO L134 LiptonReduction]: Checked pairs total: 46004 [2023-08-04 03:51:30,738 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-04 03:51:30,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:51:30,740 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;@624b9acb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:51:30,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:51:30,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:51:30,746 INFO L124 PetriNetUnfolderBase]: 27/102 cut-off events. [2023-08-04 03:51:30,746 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 03:51:30,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:51:30,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:51:30,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:51:30,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:51:30,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1502892358, now seen corresponding path program 1 times [2023-08-04 03:51:30,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:51:30,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986697635] [2023-08-04 03:51:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:30,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:51:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:51:30,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:51:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986697635] [2023-08-04 03:51:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986697635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:51:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558994128] [2023-08-04 03:51:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:51:30,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:51:30,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:51:30,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:51:30,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:51:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:51:30,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:51:30,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:51:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:51:30,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:51:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558994128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:51:30,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:51:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:51:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610980666] [2023-08-04 03:51:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:51:30,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:51:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:51:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:51:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:51:30,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-08-04 03:51:30,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 03:51:30,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:51:30,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-08-04 03:51:30,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:51:31,485 INFO L124 PetriNetUnfolderBase]: 4795/8561 cut-off events. [2023-08-04 03:51:31,485 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 03:51:31,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16037 conditions, 8561 events. 4795/8561 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 65720 event pairs, 1756 based on Foata normal form. 1680/8848 useless extension candidates. Maximal degree in co-relation 9283. Up to 7020 conditions per place. [2023-08-04 03:51:31,507 INFO L140 encePairwiseOnDemand]: 280/310 looper letters, 0 selfloop transitions, 0 changer transitions 109/109 dead transitions. [2023-08-04 03:51:31,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 406 flow [2023-08-04 03:51:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:51:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:51:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 860 transitions. [2023-08-04 03:51:31,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2023-08-04 03:51:31,510 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 860 transitions. [2023-08-04 03:51:31,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 860 transitions. [2023-08-04 03:51:31,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:51:31,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 860 transitions. [2023-08-04 03:51:31,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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 03:51:31,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 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 03:51:31,516 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 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 03:51:31,516 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 5 states and 860 transitions. [2023-08-04 03:51:31,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 406 flow [2023-08-04 03:51:31,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 109 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:51:31,518 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-04 03:51:31,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-04 03:51:31,519 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-08-04 03:51:31,519 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-04 03:51:31,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 03:51:31,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:51:31,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:51:31,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:51:31,727 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:51:31,728 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 03:51:31,728 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:51:31,728 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:51:31,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:51:31 BasicIcfg [2023-08-04 03:51:31,732 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:51:31,733 INFO L158 Benchmark]: Toolchain (without parser) took 16805.56ms. Allocated memory was 564.1MB in the beginning and 861.9MB in the end (delta: 297.8MB). Free memory was 512.4MB in the beginning and 644.7MB in the end (delta: -132.3MB). Peak memory consumption was 512.0MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,733 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 367.0MB. Free memory is still 316.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:51:31,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.81ms. Allocated memory is still 564.1MB. Free memory was 512.1MB in the beginning and 492.0MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.09ms. Allocated memory is still 564.1MB. Free memory was 492.0MB in the beginning and 489.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,734 INFO L158 Benchmark]: Boogie Preprocessor took 50.28ms. Allocated memory is still 564.1MB. Free memory was 489.9MB in the beginning and 488.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,734 INFO L158 Benchmark]: RCFGBuilder took 349.26ms. Allocated memory is still 564.1MB. Free memory was 488.1MB in the beginning and 472.5MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,734 INFO L158 Benchmark]: TraceAbstraction took 15915.93ms. Allocated memory was 564.1MB in the beginning and 861.9MB in the end (delta: 297.8MB). Free memory was 472.0MB in the beginning and 644.7MB in the end (delta: -172.7MB). Peak memory consumption was 472.2MB. Max. memory is 16.0GB. [2023-08-04 03:51:31,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 367.0MB. Free memory is still 316.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 437.81ms. Allocated memory is still 564.1MB. Free memory was 512.1MB in the beginning and 492.0MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.09ms. Allocated memory is still 564.1MB. Free memory was 492.0MB in the beginning and 489.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 50.28ms. Allocated memory is still 564.1MB. Free memory was 489.9MB in the beginning and 488.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 349.26ms. Allocated memory is still 564.1MB. Free memory was 488.1MB in the beginning and 472.5MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 15915.93ms. Allocated memory was 564.1MB in the beginning and 861.9MB in the end (delta: 297.8MB). Free memory was 472.0MB in the beginning and 644.7MB in the end (delta: -172.7MB). Peak memory consumption was 472.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 115 PlacesBefore, 46 PlacesAfterwards, 133 TransitionsBefore, 62 TransitionsAfterwards, 5490 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 2 ChoiceCompositions, 97 TotalNumberOfCompositions, 14551 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5650, independent: 5316, independent conditional: 0, independent unconditional: 5316, dependent: 334, dependent conditional: 0, dependent unconditional: 334, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2706, independent: 2654, independent conditional: 0, independent unconditional: 2654, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5650, independent: 2662, independent conditional: 0, independent unconditional: 2662, dependent: 282, dependent conditional: 0, dependent unconditional: 282, unknown: 2706, unknown conditional: 0, unknown unconditional: 2706] , Statistics on independence cache: Total cache size (in pairs): 268, Positive cache size: 235, Positive conditional cache size: 0, Positive unconditional cache size: 235, Negative cache size: 33, Negative conditional cache size: 0, Negative unconditional cache size: 33, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 115 PlacesBefore, 46 PlacesAfterwards, 133 TransitionsBefore, 62 TransitionsAfterwards, 5490 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 2 ChoiceCompositions, 97 TotalNumberOfCompositions, 14481 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4505, independent: 4173, independent conditional: 0, independent unconditional: 4173, dependent: 332, dependent conditional: 0, dependent unconditional: 332, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2589, independent: 2536, independent conditional: 0, independent unconditional: 2536, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4505, independent: 1637, independent conditional: 0, independent unconditional: 1637, dependent: 279, dependent conditional: 0, dependent unconditional: 279, unknown: 2589, unknown conditional: 0, unknown unconditional: 2589] , Statistics on independence cache: Total cache size (in pairs): 144, Positive cache size: 110, Positive conditional cache size: 0, Positive unconditional cache size: 110, Negative cache size: 34, Negative conditional cache size: 0, Negative unconditional cache size: 34, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 157 PlacesBefore, 70 PlacesAfterwards, 185 TransitionsBefore, 95 TransitionsAfterwards, 16020 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 29 ConcurrentYvCompositions, 3 ChoiceCompositions, 125 TotalNumberOfCompositions, 45797 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14403, independent: 13880, independent conditional: 0, independent unconditional: 13880, dependent: 523, dependent conditional: 0, dependent unconditional: 523, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7441, independent: 7359, independent conditional: 0, independent unconditional: 7359, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 14403, independent: 6521, independent conditional: 0, independent unconditional: 6521, dependent: 441, dependent conditional: 0, dependent unconditional: 441, unknown: 7441, unknown conditional: 0, unknown unconditional: 7441] , Statistics on independence cache: Total cache size (in pairs): 698, Positive cache size: 645, Positive conditional cache size: 0, Positive unconditional cache size: 645, Negative cache size: 53, Negative conditional cache size: 0, Negative unconditional cache size: 53, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 157 PlacesBefore, 70 PlacesAfterwards, 185 TransitionsBefore, 95 TransitionsAfterwards, 16020 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 29 ConcurrentYvCompositions, 3 ChoiceCompositions, 125 TotalNumberOfCompositions, 46004 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 17956, independent: 17433, independent conditional: 0, independent unconditional: 17433, dependent: 523, dependent conditional: 0, dependent unconditional: 523, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7687, independent: 7586, independent conditional: 0, independent unconditional: 7586, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 17956, independent: 9847, independent conditional: 0, independent unconditional: 9847, dependent: 422, dependent conditional: 0, dependent unconditional: 422, unknown: 7687, unknown conditional: 0, unknown unconditional: 7687] , Statistics on independence cache: Total cache size (in pairs): 1016, Positive cache size: 961, Positive conditional cache size: 0, Positive unconditional cache size: 961, Negative cache size: 55, Negative conditional cache size: 0, Negative unconditional cache size: 55, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 691]: 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, 153 locations, 4 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: 3.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 97 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 177 IncrementalHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 2 mSDtfsCounter, 177 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 0.4s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 133 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 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, 189 locations, 5 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: 6.5s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 232 mSDsluCounter, 70 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 846 IncrementalHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 28 mSDtfsCounter, 846 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=246occurred in iteration=2, 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 309 SizeOfPredicates, 0 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 12/15 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, 153 locations, 4 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: 2.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred 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, 6 NumberOfCodeBlocks, 6 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, 189 locations, 5 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: 3.4s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 108 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 158 IncrementalHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 0 mSDtfsCounter, 158 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 03:51:31,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...