/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:08:15,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:08:15,500 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:08:15,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:08:15,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:08:15,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:08:15,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:08:15,524 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:08:15,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:08:15,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:08:15,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:08:15,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:08:15,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:08:15,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:08:15,530 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:08:15,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:08:15,530 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:08:15,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:08:15,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:08:15,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:08:15,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:08:15,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:08:15,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:08:15,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:08:15,532 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:08:15,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:08:15,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:08:15,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:08:15,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:08:15,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:08:15,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:08:15,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:08:15,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:08:15,535 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:08:15,536 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:08:15,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:08:15,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:08:15,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:08:15,678 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:08:15,678 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:08:15,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 22:08:16,699 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:08:16,950 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:08:16,950 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 22:08:16,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1845d9593/4316c51df7924ae8a711dcb246bbd1bc/FLAGe44b800f2 [2023-08-03 22:08:16,980 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1845d9593/4316c51df7924ae8a711dcb246bbd1bc [2023-08-03 22:08:16,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:08:16,985 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:08:16,987 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:08:16,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:08:16,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:08:16,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:08:16" (1/1) ... [2023-08-03 22:08:16,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe2fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:16, skipping insertion in model container [2023-08-03 22:08:16,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:08:16" (1/1) ... [2023-08-03 22:08:17,029 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:08:17,155 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-03 22:08:17,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:08:17,291 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:08:17,302 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-03 22:08:17,314 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:08:17,315 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:08:17,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:08:17,349 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:08:17,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17 WrapperNode [2023-08-03 22:08:17,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:08:17,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:08:17,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:08:17,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:08:17,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,362 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,375 INFO L138 Inliner]: procedures = 162, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-03 22:08:17,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:08:17,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:08:17,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:08:17,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:08:17,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:08:17,391 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:08:17,391 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:08:17,391 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:08:17,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (1/1) ... [2023-08-03 22:08:17,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:08:17,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:17,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:08:17,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:08:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-03 22:08:17,438 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:08:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:08:17,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:08:17,439 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:08:17,513 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:08:17,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:08:17,632 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:08:17,636 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:08:17,637 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:08:17,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:08:17 BoogieIcfgContainer [2023-08-03 22:08:17,638 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:08:17,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:08:17,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:08:17,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:08:17,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:08:16" (1/3) ... [2023-08-03 22:08:17,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549fa25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:08:17, skipping insertion in model container [2023-08-03 22:08:17,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:17" (2/3) ... [2023-08-03 22:08:17,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549fa25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:08:17, skipping insertion in model container [2023-08-03 22:08:17,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:08:17" (3/3) ... [2023-08-03 22:08:17,644 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 22:08:17,649 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:08:17,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:08:17,656 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:08:17,656 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:08:17,702 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:08:17,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,785 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-03 22:08:17,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:08:17,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-03 22:08:17,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:08:17,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 22:08:17,849 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-03 22:08:17,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:08:17,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-03 22:08:17,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 918 [2023-08-03 22:08:19,963 INFO L134 LiptonReduction]: Checked pairs total: 675 [2023-08-03 22:08:19,963 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-03 22:08:19,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:08:19,983 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75c8c84c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:19,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:08:19,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:19,986 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 22:08:19,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:08:19,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:08:19,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:08:19,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash 462259856, now seen corresponding path program 1 times [2023-08-03 22:08:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:19,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838227102] [2023-08-03 22:08:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:19,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:08:20,067 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:08:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:08:20,096 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:08:20,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:08:20,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:08:20,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:08:20,100 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:08:20,104 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:08:20,105 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:08:20,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:08:20,124 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:08:20,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,161 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 22:08:20,162 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:08:20,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 22:08:20,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:08:20,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:20,189 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 22:08:20,189 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:08:20,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 22:08:20,194 INFO L119 LiptonReduction]: Number of co-enabled transitions 3348 [2023-08-03 22:08:21,921 INFO L134 LiptonReduction]: Checked pairs total: 8072 [2023-08-03 22:08:21,921 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-03 22:08:21,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:08:21,924 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;@75c8c84c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:21,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:08:21,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:21,927 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-03 22:08:21,927 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:08:21,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:21,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:08:21,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:08:21,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 453054460, now seen corresponding path program 1 times [2023-08-03 22:08:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491352550] [2023-08-03 22:08:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:22,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491352550] [2023-08-03 22:08:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491352550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121646558] [2023-08-03 22:08:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:22,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:22,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:22,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:08:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:22,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:08:22,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:22,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:08:22,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121646558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:22,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:08:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:08:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611342006] [2023-08-03 22:08:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:22,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:22,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:08:22,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 183 [2023-08-03 22:08:22,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:22,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:22,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 183 [2023-08-03 22:08:22,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:22,331 INFO L124 PetriNetUnfolderBase]: 289/523 cut-off events. [2023-08-03 22:08:22,331 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 22:08:22,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 523 events. 289/523 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2429 event pairs, 26 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 158. Up to 324 conditions per place. [2023-08-03 22:08:22,333 INFO L140 encePairwiseOnDemand]: 177/183 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-03 22:08:22,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 196 flow [2023-08-03 22:08:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:08:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:08:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 476 transitions. [2023-08-03 22:08:22,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202185792349727 [2023-08-03 22:08:22,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 476 transitions. [2023-08-03 22:08:22,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 476 transitions. [2023-08-03 22:08:22,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:22,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 476 transitions. [2023-08-03 22:08:22,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:22,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:22,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:22,365 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 5 states and 476 transitions. [2023-08-03 22:08:22,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 196 flow [2023-08-03 22:08:22,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:08:22,370 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-03 22:08:22,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-03 22:08:22,377 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-03 22:08:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-03 22:08:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:22,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:08:22,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 22:08:22,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:22,589 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:08:22,590 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:08:22,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,606 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 22:08:22,606 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:08:22,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 22:08:22,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:08:22,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 22:08:22,617 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 22:08:22,617 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:08:22,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 22:08:22,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 3348 [2023-08-03 22:08:24,443 INFO L134 LiptonReduction]: Checked pairs total: 8054 [2023-08-03 22:08:24,443 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-03 22:08:24,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:08:24,445 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;@75c8c84c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:24,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:08:24,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:24,447 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 22:08:24,447 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:08:24,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:24,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:24,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:24,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1227345323, now seen corresponding path program 1 times [2023-08-03 22:08:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:24,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560313601] [2023-08-03 22:08:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:24,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:24,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560313601] [2023-08-03 22:08:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560313601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:24,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:24,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:08:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392889914] [2023-08-03 22:08:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:24,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:08:24,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:08:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:08:24,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-03 22:08:24,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:24,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-03 22:08:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:24,660 INFO L124 PetriNetUnfolderBase]: 531/1053 cut-off events. [2023-08-03 22:08:24,660 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 22:08:24,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 1053 events. 531/1053 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5563 event pairs, 217 based on Foata normal form. 68/997 useless extension candidates. Maximal degree in co-relation 1310. Up to 536 conditions per place. [2023-08-03 22:08:24,664 INFO L140 encePairwiseOnDemand]: 171/181 looper letters, 32 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-03 22:08:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 185 flow [2023-08-03 22:08:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:08:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:08:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-03 22:08:24,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451197053406999 [2023-08-03 22:08:24,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-03 22:08:24,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-03 22:08:24,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:24,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-03 22:08:24,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,667 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 3 states and 296 transitions. [2023-08-03 22:08:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 185 flow [2023-08-03 22:08:24,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 183 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 22:08:24,668 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 116 flow [2023-08-03 22:08:24,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-03 22:08:24,669 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-03 22:08:24,669 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 116 flow [2023-08-03 22:08:24,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:24,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:24,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:08:24,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:24,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1638390816, now seen corresponding path program 1 times [2023-08-03 22:08:24,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937768619] [2023-08-03 22:08:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:24,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:24,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937768619] [2023-08-03 22:08:24,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937768619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:24,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:24,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:08:24,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104914843] [2023-08-03 22:08:24,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:24,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:08:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:08:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:08:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-03 22:08:24,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:24,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-03 22:08:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:24,824 INFO L124 PetriNetUnfolderBase]: 698/1346 cut-off events. [2023-08-03 22:08:24,824 INFO L125 PetriNetUnfolderBase]: For 413/425 co-relation queries the response was YES. [2023-08-03 22:08:24,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1346 events. 698/1346 cut-off events. For 413/425 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6694 event pairs, 209 based on Foata normal form. 56/1268 useless extension candidates. Maximal degree in co-relation 2331. Up to 566 conditions per place. [2023-08-03 22:08:24,828 INFO L140 encePairwiseOnDemand]: 174/181 looper letters, 35 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-03 22:08:24,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 259 flow [2023-08-03 22:08:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:08:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:08:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-03 22:08:24,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377532228360957 [2023-08-03 22:08:24,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-03 22:08:24,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-03 22:08:24,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:24,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-03 22:08:24,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,831 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 116 flow. Second operand 3 states and 292 transitions. [2023-08-03 22:08:24,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 259 flow [2023-08-03 22:08:24,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:08:24,833 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 149 flow [2023-08-03 22:08:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-08-03 22:08:24,835 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-03 22:08:24,836 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 149 flow [2023-08-03 22:08:24,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:24,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:24,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 22:08:24,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:24,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1348696381, now seen corresponding path program 1 times [2023-08-03 22:08:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:24,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232339483] [2023-08-03 22:08:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:24,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 22:08:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232339483] [2023-08-03 22:08:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232339483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:08:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525119768] [2023-08-03 22:08:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:08:24,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-03 22:08:24,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:24,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:24,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-03 22:08:24,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:25,133 INFO L124 PetriNetUnfolderBase]: 998/1907 cut-off events. [2023-08-03 22:08:25,133 INFO L125 PetriNetUnfolderBase]: For 635/659 co-relation queries the response was YES. [2023-08-03 22:08:25,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 1907 events. 998/1907 cut-off events. For 635/659 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9714 event pairs, 218 based on Foata normal form. 52/1788 useless extension candidates. Maximal degree in co-relation 3568. Up to 578 conditions per place. [2023-08-03 22:08:25,141 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 68 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2023-08-03 22:08:25,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 101 transitions, 540 flow [2023-08-03 22:08:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:08:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:08:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 657 transitions. [2023-08-03 22:08:25,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185477505919495 [2023-08-03 22:08:25,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 657 transitions. [2023-08-03 22:08:25,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 657 transitions. [2023-08-03 22:08:25,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:25,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 657 transitions. [2023-08-03 22:08:25,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.85714285714286) internal successors, (657), 7 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,147 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 149 flow. Second operand 7 states and 657 transitions. [2023-08-03 22:08:25,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 101 transitions, 540 flow [2023-08-03 22:08:25,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 101 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:08:25,151 INFO L231 Difference]: Finished difference. Result has 48 places, 58 transitions, 287 flow [2023-08-03 22:08:25,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=48, PETRI_TRANSITIONS=58} [2023-08-03 22:08:25,154 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-08-03 22:08:25,155 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 58 transitions, 287 flow [2023-08-03 22:08:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:25,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:25,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:08:25,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:25,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1914771978, now seen corresponding path program 1 times [2023-08-03 22:08:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295441332] [2023-08-03 22:08:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:08:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295441332] [2023-08-03 22:08:25,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295441332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:25,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:08:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:08:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400613916] [2023-08-03 22:08:25,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:25,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:25,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:08:25,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-03 22:08:25,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:25,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-03 22:08:25,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:25,503 INFO L124 PetriNetUnfolderBase]: 1411/2647 cut-off events. [2023-08-03 22:08:25,503 INFO L125 PetriNetUnfolderBase]: For 2291/2327 co-relation queries the response was YES. [2023-08-03 22:08:25,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7398 conditions, 2647 events. 1411/2647 cut-off events. For 2291/2327 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14135 event pairs, 398 based on Foata normal form. 40/2437 useless extension candidates. Maximal degree in co-relation 6182. Up to 1004 conditions per place. [2023-08-03 22:08:25,517 INFO L140 encePairwiseOnDemand]: 174/181 looper letters, 73 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2023-08-03 22:08:25,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 113 transitions, 728 flow [2023-08-03 22:08:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:08:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:08:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2023-08-03 22:08:25,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2023-08-03 22:08:25,522 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2023-08-03 22:08:25,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2023-08-03 22:08:25,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:25,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2023-08-03 22:08:25,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,530 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,530 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 287 flow. Second operand 6 states and 562 transitions. [2023-08-03 22:08:25,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 113 transitions, 728 flow [2023-08-03 22:08:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 113 transitions, 716 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-03 22:08:25,539 INFO L231 Difference]: Finished difference. Result has 56 places, 73 transitions, 473 flow [2023-08-03 22:08:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=56, PETRI_TRANSITIONS=73} [2023-08-03 22:08:25,541 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-03 22:08:25,541 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 73 transitions, 473 flow [2023-08-03 22:08:25,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:25,542 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:25,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:08:25,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:25,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1022919187, now seen corresponding path program 2 times [2023-08-03 22:08:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924643054] [2023-08-03 22:08:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:08:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924643054] [2023-08-03 22:08:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924643054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754447796] [2023-08-03 22:08:25,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:08:25,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:25,685 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) [2023-08-03 22:08:25,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:08:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:08:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:08:25,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-03 22:08:25,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:08:25,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:08:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754447796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:25,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:25,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-03 22:08:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666720277] [2023-08-03 22:08:25,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 22:08:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 22:08:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-03 22:08:25,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-03 22:08:25,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 73 transitions, 473 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:25,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:25,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-03 22:08:25,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:26,618 INFO L124 PetriNetUnfolderBase]: 2913/5103 cut-off events. [2023-08-03 22:08:26,619 INFO L125 PetriNetUnfolderBase]: For 8863/8911 co-relation queries the response was YES. [2023-08-03 22:08:26,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 5103 events. 2913/5103 cut-off events. For 8863/8911 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 26387 event pairs, 304 based on Foata normal form. 88/4725 useless extension candidates. Maximal degree in co-relation 14429. Up to 1073 conditions per place. [2023-08-03 22:08:26,648 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 204 selfloop transitions, 103 changer transitions 0/318 dead transitions. [2023-08-03 22:08:26,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 318 transitions, 2116 flow [2023-08-03 22:08:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-03 22:08:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-03 22:08:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2624 transitions. [2023-08-03 22:08:26,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832412523020258 [2023-08-03 22:08:26,653 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2624 transitions. [2023-08-03 22:08:26,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2624 transitions. [2023-08-03 22:08:26,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:26,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2624 transitions. [2023-08-03 22:08:26,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 87.46666666666667) internal successors, (2624), 30 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:26,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:26,665 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:26,665 INFO L175 Difference]: Start difference. First operand has 56 places, 73 transitions, 473 flow. Second operand 30 states and 2624 transitions. [2023-08-03 22:08:26,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 318 transitions, 2116 flow [2023-08-03 22:08:26,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 318 transitions, 2106 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-03 22:08:26,689 INFO L231 Difference]: Finished difference. Result has 94 places, 146 transitions, 1349 flow [2023-08-03 22:08:26,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1349, PETRI_PLACES=94, PETRI_TRANSITIONS=146} [2023-08-03 22:08:26,690 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2023-08-03 22:08:26,690 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 146 transitions, 1349 flow [2023-08-03 22:08:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:26,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:26,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 22:08:26,896 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 [2023-08-03 22:08:26,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:26,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2070220464, now seen corresponding path program 1 times [2023-08-03 22:08:26,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:26,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482092770] [2023-08-03 22:08:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:26,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:27,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482092770] [2023-08-03 22:08:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482092770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413395193] [2023-08-03 22:08:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:27,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:27,106 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) [2023-08-03 22:08:27,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:08:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:27,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 22:08:27,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:27,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413395193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:27,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-08-03 22:08:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352475502] [2023-08-03 22:08:27,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 22:08:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 22:08:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-08-03 22:08:27,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-03 22:08:27,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 146 transitions, 1349 flow. Second operand has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:27,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:27,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-03 22:08:27,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:28,943 INFO L124 PetriNetUnfolderBase]: 5912/10230 cut-off events. [2023-08-03 22:08:28,943 INFO L125 PetriNetUnfolderBase]: For 32981/33121 co-relation queries the response was YES. [2023-08-03 22:08:28,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38033 conditions, 10230 events. 5912/10230 cut-off events. For 32981/33121 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 55057 event pairs, 416 based on Foata normal form. 244/9571 useless extension candidates. Maximal degree in co-relation 36437. Up to 2285 conditions per place. [2023-08-03 22:08:28,992 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 390 selfloop transitions, 293 changer transitions 0/694 dead transitions. [2023-08-03 22:08:28,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 694 transitions, 5876 flow [2023-08-03 22:08:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-03 22:08:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-03 22:08:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5455 transitions. [2023-08-03 22:08:29,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783828816977988 [2023-08-03 22:08:29,002 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5455 transitions. [2023-08-03 22:08:29,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5455 transitions. [2023-08-03 22:08:29,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:29,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5455 transitions. [2023-08-03 22:08:29,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 86.58730158730158) internal successors, (5455), 63 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:29,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 181.0) internal successors, (11584), 64 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:29,022 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 181.0) internal successors, (11584), 64 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:29,023 INFO L175 Difference]: Start difference. First operand has 94 places, 146 transitions, 1349 flow. Second operand 63 states and 5455 transitions. [2023-08-03 22:08:29,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 694 transitions, 5876 flow [2023-08-03 22:08:29,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 694 transitions, 5383 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-03 22:08:29,125 INFO L231 Difference]: Finished difference. Result has 160 places, 347 transitions, 3777 flow [2023-08-03 22:08:29,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=3777, PETRI_PLACES=160, PETRI_TRANSITIONS=347} [2023-08-03 22:08:29,126 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 124 predicate places. [2023-08-03 22:08:29,126 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 347 transitions, 3777 flow [2023-08-03 22:08:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:29,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:29,126 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:29,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 22:08:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:29,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:29,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash 995791859, now seen corresponding path program 1 times [2023-08-03 22:08:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:29,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051218914] [2023-08-03 22:08:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:29,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051218914] [2023-08-03 22:08:29,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051218914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793732476] [2023-08-03 22:08:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:29,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:29,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 22:08:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:29,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 22:08:29,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:29,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793732476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:30,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-08-03 22:08:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103127034] [2023-08-03 22:08:30,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-03 22:08:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-03 22:08:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-08-03 22:08:30,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-03 22:08:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 347 transitions, 3777 flow. Second operand has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-03 22:08:30,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:34,495 INFO L124 PetriNetUnfolderBase]: 11001/18959 cut-off events. [2023-08-03 22:08:34,496 INFO L125 PetriNetUnfolderBase]: For 79993/80273 co-relation queries the response was YES. [2023-08-03 22:08:34,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77041 conditions, 18959 events. 11001/18959 cut-off events. For 79993/80273 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 103860 event pairs, 640 based on Foata normal form. 496/17765 useless extension candidates. Maximal degree in co-relation 75393. Up to 4245 conditions per place. [2023-08-03 22:08:34,612 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 751 selfloop transitions, 637 changer transitions 0/1399 dead transitions. [2023-08-03 22:08:34,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1399 transitions, 12776 flow [2023-08-03 22:08:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-03 22:08:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-03 22:08:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 11356 transitions. [2023-08-03 22:08:34,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530554160388416 [2023-08-03 22:08:34,626 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 11356 transitions. [2023-08-03 22:08:34,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 11356 transitions. [2023-08-03 22:08:34,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:34,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 11356 transitions. [2023-08-03 22:08:34,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 86.03030303030303) internal successors, (11356), 132 states have internal predecessors, (11356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:34,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 181.0) internal successors, (24073), 133 states have internal predecessors, (24073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:34,682 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 181.0) internal successors, (24073), 133 states have internal predecessors, (24073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:34,682 INFO L175 Difference]: Start difference. First operand has 160 places, 347 transitions, 3777 flow. Second operand 132 states and 11356 transitions. [2023-08-03 22:08:34,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1399 transitions, 12776 flow [2023-08-03 22:08:35,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1399 transitions, 10700 flow, removed 374 selfloop flow, removed 9 redundant places. [2023-08-03 22:08:35,036 INFO L231 Difference]: Finished difference. Result has 298 places, 693 transitions, 7335 flow [2023-08-03 22:08:35,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=7335, PETRI_PLACES=298, PETRI_TRANSITIONS=693} [2023-08-03 22:08:35,037 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 262 predicate places. [2023-08-03 22:08:35,037 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 693 transitions, 7335 flow [2023-08-03 22:08:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:35,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:35,037 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:08:35,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:08:35,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:35,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:08:35,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:35,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1630898836, now seen corresponding path program 2 times [2023-08-03 22:08:35,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:35,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100055655] [2023-08-03 22:08:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:35,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 109 proven. 463 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:08:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100055655] [2023-08-03 22:08:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100055655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709552023] [2023-08-03 22:08:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:08:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:36,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 22:08:36,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:08:36,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:08:36,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 22:08:36,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:36,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 22:08:36,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:08:36,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:08:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-03 22:08:36,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:08:36,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 22:08:36,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-03 22:08:36,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-03 22:08:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-03 22:08:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709552023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:08:36,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:08:36,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 41 [2023-08-03 22:08:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228478130] [2023-08-03 22:08:36,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:08:36,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-03 22:08:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-03 22:08:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1357, Unknown=3, NotChecked=0, Total=1640 [2023-08-03 22:08:37,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 181 [2023-08-03 22:08:37,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 693 transitions, 7335 flow. Second operand has 41 states, 41 states have (on average 72.78048780487805) internal successors, (2984), 41 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:37,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:37,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 181 [2023-08-03 22:08:37,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:08:37,418 INFO L124 PetriNetUnfolderBase]: 444/836 cut-off events. [2023-08-03 22:08:37,418 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2023-08-03 22:08:37,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 836 events. 444/836 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3850 event pairs, 0 based on Foata normal form. 56/799 useless extension candidates. Maximal degree in co-relation 2815. Up to 289 conditions per place. [2023-08-03 22:08:37,420 INFO L140 encePairwiseOnDemand]: 170/181 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2023-08-03 22:08:37,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 87 transitions, 539 flow [2023-08-03 22:08:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 22:08:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 22:08:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 905 transitions. [2023-08-03 22:08:37,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-03 22:08:37,422 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 905 transitions. [2023-08-03 22:08:37,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 905 transitions. [2023-08-03 22:08:37,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:08:37,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 905 transitions. [2023-08-03 22:08:37,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 75.41666666666667) internal successors, (905), 12 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:37,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:37,425 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:37,425 INFO L175 Difference]: Start difference. First operand has 298 places, 693 transitions, 7335 flow. Second operand 12 states and 905 transitions. [2023-08-03 22:08:37,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 87 transitions, 539 flow [2023-08-03 22:08:37,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 437 flow, removed 4 selfloop flow, removed 25 redundant places. [2023-08-03 22:08:37,427 INFO L231 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2023-08-03 22:08:37,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=80, PETRI_TRANSITIONS=0} [2023-08-03 22:08:37,427 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-03 22:08:37,428 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2023-08-03 22:08:37,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 72.78048780487805) internal successors, (2984), 41 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:37,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 22:08:37,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 22:08:37,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 22:08:37,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 22:08:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 22:08:37,634 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-03 22:08:37,634 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 22:08:37,636 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:08:37,636 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:08:37,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:08:37 BasicIcfg [2023-08-03 22:08:37,640 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:08:37,641 INFO L158 Benchmark]: Toolchain (without parser) took 20655.49ms. Allocated memory was 448.8MB in the beginning and 1.1GB in the end (delta: 654.3MB). Free memory was 411.3MB in the beginning and 661.1MB in the end (delta: -249.8MB). Peak memory consumption was 405.7MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,641 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 360.7MB. Free memory is still 317.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:08:37,641 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.32ms. Allocated memory is still 448.8MB. Free memory was 410.9MB in the beginning and 392.1MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,641 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.20ms. Allocated memory is still 448.8MB. Free memory was 391.7MB in the beginning and 390.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,641 INFO L158 Benchmark]: Boogie Preprocessor took 15.04ms. Allocated memory is still 448.8MB. Free memory was 390.0MB in the beginning and 388.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,642 INFO L158 Benchmark]: RCFGBuilder took 247.24ms. Allocated memory is still 448.8MB. Free memory was 388.4MB in the beginning and 375.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,642 INFO L158 Benchmark]: TraceAbstraction took 20001.02ms. Allocated memory was 448.8MB in the beginning and 1.1GB in the end (delta: 654.3MB). Free memory was 374.6MB in the beginning and 661.1MB in the end (delta: -286.5MB). Peak memory consumption was 370.1MB. Max. memory is 16.0GB. [2023-08-03 22:08:37,643 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 360.7MB. Free memory is still 317.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 362.32ms. Allocated memory is still 448.8MB. Free memory was 410.9MB in the beginning and 392.1MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.20ms. Allocated memory is still 448.8MB. Free memory was 391.7MB in the beginning and 390.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.04ms. Allocated memory is still 448.8MB. Free memory was 390.0MB in the beginning and 388.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 247.24ms. Allocated memory is still 448.8MB. Free memory was 388.4MB in the beginning and 375.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 20001.02ms. Allocated memory was 448.8MB in the beginning and 1.1GB in the end (delta: 654.3MB). Free memory was 374.6MB in the beginning and 661.1MB in the end (delta: -286.5MB). Peak memory consumption was 370.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 72 PlacesBefore, 12 PlacesAfterwards, 74 TransitionsBefore, 10 TransitionsAfterwards, 918 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 675 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 675, independent: 675, independent conditional: 0, independent unconditional: 675, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 469, independent: 469, independent conditional: 0, independent unconditional: 469, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 675, independent: 206, independent conditional: 0, independent unconditional: 206, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 469, unknown conditional: 0, unknown unconditional: 469] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 98 PlacesBefore, 36 PlacesAfterwards, 102 TransitionsBefore, 35 TransitionsAfterwards, 3348 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 81 TotalNumberOfCompositions, 8072 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3768, independent: 3526, independent conditional: 0, independent unconditional: 3526, dependent: 242, dependent conditional: 0, dependent unconditional: 242, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1685, independent: 1649, independent conditional: 0, independent unconditional: 1649, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3768, independent: 1877, independent conditional: 0, independent unconditional: 1877, dependent: 206, dependent conditional: 0, dependent unconditional: 206, unknown: 1685, unknown conditional: 0, unknown unconditional: 1685] , Statistics on independence cache: Total cache size (in pairs): 149, Positive cache size: 129, Positive conditional cache size: 0, Positive unconditional cache size: 129, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 98 PlacesBefore, 36 PlacesAfterwards, 102 TransitionsBefore, 35 TransitionsAfterwards, 3348 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 79 TotalNumberOfCompositions, 8054 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4665, independent: 4417, independent conditional: 0, independent unconditional: 4417, dependent: 248, dependent conditional: 0, dependent unconditional: 248, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1733, independent: 1696, independent conditional: 0, independent unconditional: 1696, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4665, independent: 2721, independent conditional: 0, independent unconditional: 2721, dependent: 211, dependent conditional: 0, dependent unconditional: 211, unknown: 1733, unknown conditional: 0, unknown unconditional: 1733] , Statistics on independence cache: Total cache size (in pairs): 197, Positive cache size: 177, Positive conditional cache size: 0, Positive unconditional cache size: 177, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 94 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, 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=25occurred 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, 118 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: 2.5s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 86 IncrementalHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 86 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=82occurred 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, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 130 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 118 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: 15.0s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 3265 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3133 mSDsluCounter, 1967 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1949 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4792 IncrementalHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 18 mSDtfsCounter, 4792 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1141 GetRequests, 840 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10054 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7335occurred in iteration=7, InterpolantAutomatonStates: 256, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 763 NumberOfCodeBlocks, 763 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1089 ConstructedInterpolants, 1 QuantifiedInterpolants, 2284 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1690 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 1593/2370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:08:37,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...