/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:20:45,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:20:45,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:20:45,539 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:20:45,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:20:45,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:20:45,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:20:45,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:20:45,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:20:45,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:20:45,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:20:45,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:20:45,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:20:45,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:20:45,582 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:20:45,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:20:45,582 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:20:45,582 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:20:45,582 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:20:45,583 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:20:45,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:20:45,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:20:45,583 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:20:45,584 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:20:45,585 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:20:45,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:20:45,585 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:20:45,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:20:45,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:20:45,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:20:45,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:20:45,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:20:45,588 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:20:45,589 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:20:45,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:20:45,589 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:20:45,589 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:20:45,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:20:45,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:20:45,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:20:45,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:20:45,836 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:20:45,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-04 01:20:46,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:20:47,236 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:20:47,237 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-04 01:20:47,254 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adace2264/cf38003e650645aeaa34912db8a7436a/FLAGbf04accde [2023-08-04 01:20:47,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adace2264/cf38003e650645aeaa34912db8a7436a [2023-08-04 01:20:47,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:20:47,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:20:47,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:20:47,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:20:47,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:20:47,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781feb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47, skipping insertion in model container [2023-08-04 01:20:47,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,330 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:20:47,681 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-04 01:20:47,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:20:47,715 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:20:47,739 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 01:20:47,741 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 01:20:47,760 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-04 01:20:47,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:20:47,820 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:20:47,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47 WrapperNode [2023-08-04 01:20:47,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:20:47,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:20:47,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:20:47,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:20:47,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,863 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2023-08-04 01:20:47,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:20:47,864 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:20:47,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:20:47,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:20:47,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:20:47,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:20:47,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:20:47,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:20:47,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (1/1) ... [2023-08-04 01:20:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:20:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:47,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:20:47,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 01:20:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:20:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:20:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-08-04 01:20:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:20:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 01:20:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 01:20:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 01:20:47,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 01:20:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:20:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 01:20:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:20:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:20:47,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:20:47,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:20:47,980 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:20:48,124 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:20:48,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:20:48,356 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:20:48,362 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:20:48,362 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 01:20:48,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:20:48 BoogieIcfgContainer [2023-08-04 01:20:48,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:20:48,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:20:48,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:20:48,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:20:48,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:20:47" (1/3) ... [2023-08-04 01:20:48,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59758b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:20:48, skipping insertion in model container [2023-08-04 01:20:48,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:20:47" (2/3) ... [2023-08-04 01:20:48,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59758b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:20:48, skipping insertion in model container [2023-08-04 01:20:48,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:20:48" (3/3) ... [2023-08-04 01:20:48,371 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_bigshot_s_bound2.i [2023-08-04 01:20:48,376 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:20:48,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:20:48,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:20:48,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:20:48,444 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:20:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 01:20:48,540 INFO L124 PetriNetUnfolderBase]: 31/262 cut-off events. [2023-08-04 01:20:48,540 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 01:20:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 31/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 966 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-08-04 01:20:48,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 01:20:48,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 246 flow [2023-08-04 01:20:48,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:20:48,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 115 transitions, 246 flow [2023-08-04 01:20:48,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 115 transitions, 246 flow [2023-08-04 01:20:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 246 flow [2023-08-04 01:20:48,602 INFO L124 PetriNetUnfolderBase]: 29/256 cut-off events. [2023-08-04 01:20:48,602 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 01:20:48,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 256 events. 29/256 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 937 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-04 01:20:48,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 01:20:51,271 INFO L134 LiptonReduction]: Checked pairs total: 4155 [2023-08-04 01:20:51,271 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-04 01:20:51,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:20:51,290 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;@d2c569, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:20:51,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:20:51,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:20:51,296 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2023-08-04 01:20:51,296 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 01:20:51,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:51,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:20:51,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:51,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash 311719186, now seen corresponding path program 1 times [2023-08-04 01:20:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:51,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165553803] [2023-08-04 01:20:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:51,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:20:51,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:20:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:20:51,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:20:51,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:20:51,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:20:51,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:20:51,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:20:51,466 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:20:51,468 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:20:51,469 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:20:51,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:20:51,502 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:20:51,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 01:20:51,651 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-04 01:20:51,652 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 01:20:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4816 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-04 01:20:51,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 01:20:51,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 145 transitions, 332 flow [2023-08-04 01:20:51,667 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:20:51,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 145 transitions, 332 flow [2023-08-04 01:20:51,668 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 145 transitions, 332 flow [2023-08-04 01:20:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 145 transitions, 332 flow [2023-08-04 01:20:51,787 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-04 01:20:51,787 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 01:20:51,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4811 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-04 01:20:51,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 6648 [2023-08-04 01:20:54,531 INFO L134 LiptonReduction]: Checked pairs total: 15043 [2023-08-04 01:20:54,532 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 01:20:54,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:20:54,535 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;@d2c569, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:20:54,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:20:54,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:20:54,541 INFO L124 PetriNetUnfolderBase]: 10/79 cut-off events. [2023-08-04 01:20:54,541 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:20:54,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:54,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:20:54,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:54,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -186878741, now seen corresponding path program 1 times [2023-08-04 01:20:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:54,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752589331] [2023-08-04 01:20:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:20:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752589331] [2023-08-04 01:20:54,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752589331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306901295] [2023-08-04 01:20:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:54,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:20:54,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:20:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:54,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:20:54,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:20:54,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306901295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:54,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:54,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:20:54,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49617907] [2023-08-04 01:20:54,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:54,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:54,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:20:54,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:20:54,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:54,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:54,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:20:54,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:56,495 INFO L124 PetriNetUnfolderBase]: 12719/18158 cut-off events. [2023-08-04 01:20:56,495 INFO L125 PetriNetUnfolderBase]: For 947/947 co-relation queries the response was YES. [2023-08-04 01:20:56,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35730 conditions, 18158 events. 12719/18158 cut-off events. For 947/947 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 99251 event pairs, 4680 based on Foata normal form. 1640/14914 useless extension candidates. Maximal degree in co-relation 12438. Up to 16805 conditions per place. [2023-08-04 01:20:56,546 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 34 selfloop transitions, 5 changer transitions 14/59 dead transitions. [2023-08-04 01:20:56,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 260 flow [2023-08-04 01:20:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:20:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:20:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-04 01:20:56,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2023-08-04 01:20:56,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-04 01:20:56,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-04 01:20:56,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:56,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-04 01:20:56,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:56,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:56,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:56,584 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 146 flow. Second operand 5 states and 665 transitions. [2023-08-04 01:20:56,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 260 flow [2023-08-04 01:20:56,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:20:56,597 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 115 flow [2023-08-04 01:20:56,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-04 01:20:56,602 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-04 01:20:56,602 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 115 flow [2023-08-04 01:20:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:56,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:56,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:56,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:56,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:56,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:56,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash 43963947, now seen corresponding path program 1 times [2023-08-04 01:20:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:56,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736850917] [2023-08-04 01:20:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:20:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736850917] [2023-08-04 01:20:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736850917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:20:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:20:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367123642] [2023-08-04 01:20:56,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:20:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:20:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:20:56,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:20:56,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:56,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:56,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:20:56,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:57,202 INFO L124 PetriNetUnfolderBase]: 2974/4429 cut-off events. [2023-08-04 01:20:57,203 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-08-04 01:20:57,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8863 conditions, 4429 events. 2974/4429 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21351 event pairs, 1576 based on Foata normal form. 1/3518 useless extension candidates. Maximal degree in co-relation 1950. Up to 4030 conditions per place. [2023-08-04 01:20:57,228 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 32 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 01:20:57,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 186 flow [2023-08-04 01:20:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:20:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:20:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 01:20:57,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069182389937107 [2023-08-04 01:20:57,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 01:20:57,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 01:20:57,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:57,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 01:20:57,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,233 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 115 flow. Second operand 3 states and 403 transitions. [2023-08-04 01:20:57,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 186 flow [2023-08-04 01:20:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 183 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:20:57,236 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 111 flow [2023-08-04 01:20:57,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 01:20:57,237 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-04 01:20:57,237 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 111 flow [2023-08-04 01:20:57,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:57,237 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:20:57,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:57,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1524094943, now seen corresponding path program 1 times [2023-08-04 01:20:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:57,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261861499] [2023-08-04 01:20:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:57,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:20:57,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261861499] [2023-08-04 01:20:57,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261861499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570683182] [2023-08-04 01:20:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:57,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:57,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:20:57,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:20:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:57,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:20:57,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 01:20:57,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:57,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570683182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:57,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:57,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:20:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614719584] [2023-08-04 01:20:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:57,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:20:57,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:20:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:57,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:20:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:20:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:57,643 INFO L124 PetriNetUnfolderBase]: 1152/1841 cut-off events. [2023-08-04 01:20:57,643 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-08-04 01:20:57,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3681 conditions, 1841 events. 1152/1841 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8364 event pairs, 740 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 3646. Up to 1599 conditions per place. [2023-08-04 01:20:57,652 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 36 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-04 01:20:57,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 209 flow [2023-08-04 01:20:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:20:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:20:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-04 01:20:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119496855345912 [2023-08-04 01:20:57,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-04 01:20:57,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-04 01:20:57,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:57,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-04 01:20:57,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,658 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 111 flow. Second operand 3 states and 407 transitions. [2023-08-04 01:20:57,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 209 flow [2023-08-04 01:20:57,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:20:57,660 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 122 flow [2023-08-04 01:20:57,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-04 01:20:57,661 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-04 01:20:57,661 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 122 flow [2023-08-04 01:20:57,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:57,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:57,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:57,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:57,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:20:57,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:57,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1556074706, now seen corresponding path program 1 times [2023-08-04 01:20:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:57,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088501183] [2023-08-04 01:20:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:57,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 01:20:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088501183] [2023-08-04 01:20:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088501183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640207095] [2023-08-04 01:20:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:57,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:57,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:20:57,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:20:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:58,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:20:58,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 01:20:58,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:20:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 01:20:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640207095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:20:58,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:20:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:20:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791468534] [2023-08-04 01:20:58,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:20:58,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:58,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:20:58,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:58,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:20:58,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:58,277 INFO L124 PetriNetUnfolderBase]: 1147/1828 cut-off events. [2023-08-04 01:20:58,277 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-04 01:20:58,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3678 conditions, 1828 events. 1147/1828 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8131 event pairs, 463 based on Foata normal form. 3/1439 useless extension candidates. Maximal degree in co-relation 1253. Up to 1620 conditions per place. [2023-08-04 01:20:58,287 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 35 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-04 01:20:58,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 206 flow [2023-08-04 01:20:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:20:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:20:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2023-08-04 01:20:58,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2023-08-04 01:20:58,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2023-08-04 01:20:58,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2023-08-04 01:20:58,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:58,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2023-08-04 01:20:58,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,293 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 122 flow. Second operand 4 states and 526 transitions. [2023-08-04 01:20:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 206 flow [2023-08-04 01:20:58,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:20:58,295 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 118 flow [2023-08-04 01:20:58,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 01:20:58,296 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-04 01:20:58,296 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 118 flow [2023-08-04 01:20:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:58,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:58,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 01:20:58,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:58,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:58,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:58,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1150493005, now seen corresponding path program 1 times [2023-08-04 01:20:58,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:58,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408846962] [2023-08-04 01:20:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:58,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:20:58,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:58,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408846962] [2023-08-04 01:20:58,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408846962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:58,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553875664] [2023-08-04 01:20:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:58,567 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) [2023-08-04 01:20:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:20:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:58,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:20:58,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:20:58,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:20:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:20:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553875664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:20:58,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:20:58,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:20:58,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954498261] [2023-08-04 01:20:58,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:20:58,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:58,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:58,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:20:58,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:58,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:20:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:58,793 INFO L124 PetriNetUnfolderBase]: 179/344 cut-off events. [2023-08-04 01:20:58,793 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-04 01:20:58,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 344 events. 179/344 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1023 event pairs, 88 based on Foata normal form. 6/294 useless extension candidates. Maximal degree in co-relation 495. Up to 235 conditions per place. [2023-08-04 01:20:58,797 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 39 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 01:20:58,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 232 flow [2023-08-04 01:20:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:20:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:20:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-04 01:20:58,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009433962264151 [2023-08-04 01:20:58,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-04 01:20:58,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-04 01:20:58,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:58,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-04 01:20:58,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,804 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,804 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 118 flow. Second operand 4 states and 531 transitions. [2023-08-04 01:20:58,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 232 flow [2023-08-04 01:20:58,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 01:20:58,806 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 126 flow [2023-08-04 01:20:58,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-08-04 01:20:58,811 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-04 01:20:58,811 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 126 flow [2023-08-04 01:20:58,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:58,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:58,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:58,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:59,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:59,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:20:59,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 299874897, now seen corresponding path program 1 times [2023-08-04 01:20:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607809660] [2023-08-04 01:20:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:20:59,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607809660] [2023-08-04 01:20:59,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607809660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490673282] [2023-08-04 01:20:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:59,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:59,137 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) [2023-08-04 01:20:59,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 01:20:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:59,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:20:59,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:20:59,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490673282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:59,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:59,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:20:59,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083822702] [2023-08-04 01:20:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:59,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:20:59,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:20:59,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:59,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:59,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:20:59,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:59,362 INFO L124 PetriNetUnfolderBase]: 139/273 cut-off events. [2023-08-04 01:20:59,362 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-08-04 01:20:59,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 273 events. 139/273 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 701 event pairs, 59 based on Foata normal form. 16/249 useless extension candidates. Maximal degree in co-relation 416. Up to 127 conditions per place. [2023-08-04 01:20:59,363 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-04 01:20:59,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 252 flow [2023-08-04 01:20:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:20:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:20:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 657 transitions. [2023-08-04 01:20:59,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4958490566037736 [2023-08-04 01:20:59,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 657 transitions. [2023-08-04 01:20:59,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 657 transitions. [2023-08-04 01:20:59,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:59,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 657 transitions. [2023-08-04 01:20:59,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.4) internal successors, (657), 5 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) [2023-08-04 01:20:59,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:59,370 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:59,370 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 126 flow. Second operand 5 states and 657 transitions. [2023-08-04 01:20:59,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 252 flow [2023-08-04 01:20:59,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 245 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:20:59,371 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-04 01:20:59,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=5, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-04 01:20:59,372 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-04 01:20:59,372 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-04 01:20:59,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:59,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:20:59,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:20:59,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:59,578 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 01:20:59,579 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:20:59,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 01:20:59,655 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-04 01:20:59,655 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 01:20:59,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4816 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-04 01:20:59,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 01:20:59,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 144 transitions, 326 flow [2023-08-04 01:20:59,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:20:59,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 144 transitions, 326 flow [2023-08-04 01:20:59,663 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 144 transitions, 326 flow [2023-08-04 01:20:59,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 144 transitions, 326 flow [2023-08-04 01:20:59,735 INFO L124 PetriNetUnfolderBase]: 122/891 cut-off events. [2023-08-04 01:20:59,735 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 01:20:59,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 891 events. 122/891 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4812 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 524. Up to 32 conditions per place. [2023-08-04 01:20:59,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 6624 [2023-08-04 01:21:02,478 INFO L134 LiptonReduction]: Checked pairs total: 14945 [2023-08-04 01:21:02,478 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 01:21:02,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:21:02,482 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;@d2c569, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:21:02,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:21:02,484 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:21:02,484 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-04 01:21:02,484 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:21:02,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:02,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 01:21:02,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:02,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash -442518076, now seen corresponding path program 1 times [2023-08-04 01:21:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482670681] [2023-08-04 01:21:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:21:02,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:02,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482670681] [2023-08-04 01:21:02,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482670681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:02,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:21:02,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:21:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154985376] [2023-08-04 01:21:02,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:02,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:21:02,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:21:02,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:02,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:02,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:21:02,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:03,661 INFO L124 PetriNetUnfolderBase]: 12730/18146 cut-off events. [2023-08-04 01:21:03,662 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2023-08-04 01:21:03,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35738 conditions, 18146 events. 12730/18146 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 98250 event pairs, 6710 based on Foata normal form. 1640/14894 useless extension candidates. Maximal degree in co-relation 12424. Up to 16851 conditions per place. [2023-08-04 01:21:03,739 INFO L140 encePairwiseOnDemand]: 260/265 looper letters, 42 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2023-08-04 01:21:03,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 236 flow [2023-08-04 01:21:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 01:21:03,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-04 01:21:03,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 01:21:03,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 01:21:03,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:03,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 01:21:03,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:03,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:03,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:03,744 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 140 flow. Second operand 3 states and 418 transitions. [2023-08-04 01:21:03,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 236 flow [2023-08-04 01:21:03,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:03,747 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 135 flow [2023-08-04 01:21:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-04 01:21:03,748 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 01:21:03,748 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 135 flow [2023-08-04 01:21:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:03,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:03,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:03,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 01:21:03,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:03,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 789229061, now seen corresponding path program 1 times [2023-08-04 01:21:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053289169] [2023-08-04 01:21:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:03,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:21:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053289169] [2023-08-04 01:21:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053289169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475049328] [2023-08-04 01:21:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:03,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:03,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 01:21:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:03,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:21:03,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:21:03,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:21:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475049328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:21:03,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:21:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886779319] [2023-08-04 01:21:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:21:03,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:03,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:03,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:21:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:04,221 INFO L124 PetriNetUnfolderBase]: 3827/5740 cut-off events. [2023-08-04 01:21:04,221 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-08-04 01:21:04,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11310 conditions, 5740 events. 3827/5740 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28644 event pairs, 2404 based on Foata normal form. 0/4089 useless extension candidates. Maximal degree in co-relation 11276. Up to 5237 conditions per place. [2023-08-04 01:21:04,245 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 01:21:04,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 254 flow [2023-08-04 01:21:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 01:21:04,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-04 01:21:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 01:21:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 01:21:04,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:04,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 01:21:04,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:04,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:04,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:04,250 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 135 flow. Second operand 3 states and 418 transitions. [2023-08-04 01:21:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 254 flow [2023-08-04 01:21:04,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:04,253 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 143 flow [2023-08-04 01:21:04,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 01:21:04,253 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-04 01:21:04,253 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 143 flow [2023-08-04 01:21:04,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:04,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:04,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:04,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:04,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:04,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1149746514, now seen corresponding path program 1 times [2023-08-04 01:21:04,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114889029] [2023-08-04 01:21:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:21:04,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114889029] [2023-08-04 01:21:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114889029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205680545] [2023-08-04 01:21:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:04,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:04,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 01:21:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:04,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:21:04,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:21:04,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:21:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205680545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:04,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:21:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:21:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894816461] [2023-08-04 01:21:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:04,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:04,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:21:04,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:04,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:04,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:21:04,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:04,985 INFO L124 PetriNetUnfolderBase]: 3820/5684 cut-off events. [2023-08-04 01:21:04,985 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-04 01:21:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 5684 events. 3820/5684 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 27704 event pairs, 1561 based on Foata normal form. 0/4051 useless extension candidates. Maximal degree in co-relation 6278. Up to 5213 conditions per place. [2023-08-04 01:21:05,013 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 01:21:05,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 271 flow [2023-08-04 01:21:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 01:21:05,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-04 01:21:05,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 01:21:05,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 01:21:05,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:05,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 01:21:05,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,021 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 143 flow. Second operand 3 states and 421 transitions. [2023-08-04 01:21:05,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 271 flow [2023-08-04 01:21:05,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:05,024 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 153 flow [2023-08-04 01:21:05,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 01:21:05,025 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 01:21:05,025 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 153 flow [2023-08-04 01:21:05,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:05,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:05,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:05,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:05,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -416912901, now seen corresponding path program 1 times [2023-08-04 01:21:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:05,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537258318] [2023-08-04 01:21:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:21:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537258318] [2023-08-04 01:21:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537258318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963843201] [2023-08-04 01:21:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:05,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:05,281 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:05,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 01:21:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:05,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:21:05,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:21:05,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:21:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963843201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:05,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:21:05,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:21:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735987225] [2023-08-04 01:21:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:05,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 01:21:05,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:05,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 01:21:05,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:05,729 INFO L124 PetriNetUnfolderBase]: 2987/4531 cut-off events. [2023-08-04 01:21:05,729 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-04 01:21:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 4531 events. 2987/4531 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 21810 event pairs, 1305 based on Foata normal form. 0/3461 useless extension candidates. Maximal degree in co-relation 5530. Up to 2956 conditions per place. [2023-08-04 01:21:05,748 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 61 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 01:21:05,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 329 flow [2023-08-04 01:21:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-04 01:21:05,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421383647798742 [2023-08-04 01:21:05,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-04 01:21:05,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-04 01:21:05,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:05,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-04 01:21:05,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,753 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 153 flow. Second operand 3 states and 431 transitions. [2023-08-04 01:21:05,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 329 flow [2023-08-04 01:21:05,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:05,755 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 165 flow [2023-08-04 01:21:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-04 01:21:05,756 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-04 01:21:05,756 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 165 flow [2023-08-04 01:21:05,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:05,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:05,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:05,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 01:21:05,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:05,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1705760161, now seen corresponding path program 1 times [2023-08-04 01:21:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:05,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211397582] [2023-08-04 01:21:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:21:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211397582] [2023-08-04 01:21:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211397582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751055437] [2023-08-04 01:21:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:06,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:06,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:06,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 01:21:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:06,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:06,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:21:06,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:21:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751055437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:06,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:06,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:21:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311898231] [2023-08-04 01:21:06,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:06,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:21:06,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:06,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:21:06,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:06,462 INFO L124 PetriNetUnfolderBase]: 2982/4563 cut-off events. [2023-08-04 01:21:06,462 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-08-04 01:21:06,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9868 conditions, 4563 events. 2982/4563 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22220 event pairs, 1264 based on Foata normal form. 3/3564 useless extension candidates. Maximal degree in co-relation 4136. Up to 4212 conditions per place. [2023-08-04 01:21:06,480 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 48 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 01:21:06,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 285 flow [2023-08-04 01:21:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-04 01:21:06,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075471698113208 [2023-08-04 01:21:06,483 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-04 01:21:06,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-04 01:21:06,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:06,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-04 01:21:06,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,486 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,486 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 165 flow. Second operand 4 states and 538 transitions. [2023-08-04 01:21:06,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 285 flow [2023-08-04 01:21:06,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:06,493 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 177 flow [2023-08-04 01:21:06,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 01:21:06,494 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-08-04 01:21:06,494 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 177 flow [2023-08-04 01:21:06,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:06,494 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, 1, 1] [2023-08-04 01:21:06,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:06,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:06,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:06,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1715664649, now seen corresponding path program 1 times [2023-08-04 01:21:06,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:06,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719158115] [2023-08-04 01:21:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:06,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:21:06,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:06,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719158115] [2023-08-04 01:21:06,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719158115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:06,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249419150] [2023-08-04 01:21:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:06,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:06,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:06,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 01:21:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:06,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:06,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:21:06,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:21:06,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249419150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:06,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:21:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671398454] [2023-08-04 01:21:06,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:06,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:21:06,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:06,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:06,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:21:06,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:06,993 INFO L124 PetriNetUnfolderBase]: 340/614 cut-off events. [2023-08-04 01:21:06,993 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-08-04 01:21:06,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 614 events. 340/614 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2025 event pairs, 179 based on Foata normal form. 6/494 useless extension candidates. Maximal degree in co-relation 1118. Up to 491 conditions per place. [2023-08-04 01:21:06,995 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 50 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 01:21:06,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 305 flow [2023-08-04 01:21:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-04 01:21:06,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-04 01:21:06,997 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-04 01:21:06,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-04 01:21:06,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:06,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-04 01:21:06,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,001 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,001 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 177 flow. Second operand 4 states and 540 transitions. [2023-08-04 01:21:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 305 flow [2023-08-04 01:21:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 296 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:21:07,003 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 174 flow [2023-08-04 01:21:07,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-04 01:21:07,004 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-08-04 01:21:07,004 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 174 flow [2023-08-04 01:21:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:07,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:07,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:07,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 01:21:07,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:07,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -623732635, now seen corresponding path program 1 times [2023-08-04 01:21:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309428661] [2023-08-04 01:21:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:21:07,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:07,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309428661] [2023-08-04 01:21:07,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309428661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:07,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:21:07,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:21:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16362867] [2023-08-04 01:21:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:21:07,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:21:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:21:07,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 265 [2023-08-04 01:21:07,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:07,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 265 [2023-08-04 01:21:07,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:07,464 INFO L124 PetriNetUnfolderBase]: 555/1035 cut-off events. [2023-08-04 01:21:07,464 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-04 01:21:07,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1035 events. 555/1035 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4399 event pairs, 329 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 1193. Up to 496 conditions per place. [2023-08-04 01:21:07,467 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 78 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-04 01:21:07,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 87 transitions, 497 flow [2023-08-04 01:21:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-04 01:21:07,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254716981132076 [2023-08-04 01:21:07,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-04 01:21:07,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-04 01:21:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:07,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-04 01:21:07,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,472 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 174 flow. Second operand 4 states and 557 transitions. [2023-08-04 01:21:07,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 87 transitions, 497 flow [2023-08-04 01:21:07,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 87 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:07,475 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 186 flow [2023-08-04 01:21:07,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-04 01:21:07,476 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-08-04 01:21:07,476 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 186 flow [2023-08-04 01:21:07,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:07,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 01:21:07,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:07,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -294838375, now seen corresponding path program 2 times [2023-08-04 01:21:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251212579] [2023-08-04 01:21:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:21:07,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251212579] [2023-08-04 01:21:07,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251212579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:07,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859510259] [2023-08-04 01:21:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:21:07,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:07,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:07,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 01:21:07,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-04 01:21:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:21:07,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 01:21:07,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:21:07,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:21:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859510259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:07,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:21:07,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 01:21:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129260244] [2023-08-04 01:21:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:07,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:07,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:07,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:07,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 265 [2023-08-04 01:21:07,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:07,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 265 [2023-08-04 01:21:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:07,783 INFO L124 PetriNetUnfolderBase]: 556/1048 cut-off events. [2023-08-04 01:21:07,783 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2023-08-04 01:21:07,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 1048 events. 556/1048 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4481 event pairs, 373 based on Foata normal form. 9/937 useless extension candidates. Maximal degree in co-relation 1264. Up to 940 conditions per place. [2023-08-04 01:21:07,787 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 42 selfloop transitions, 0 changer transitions 11/59 dead transitions. [2023-08-04 01:21:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 316 flow [2023-08-04 01:21:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 01:21:07,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-04 01:21:07,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 01:21:07,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 01:21:07,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:07,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 01:21:07,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,792 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 186 flow. Second operand 3 states and 421 transitions. [2023-08-04 01:21:07,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 316 flow [2023-08-04 01:21:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:07,794 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 178 flow [2023-08-04 01:21:07,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-04 01:21:07,796 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2023-08-04 01:21:07,796 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 178 flow [2023-08-04 01:21:07,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:07,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:07,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:07,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 01:21:08,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:08,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 843519002, now seen corresponding path program 1 times [2023-08-04 01:21:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700210846] [2023-08-04 01:21:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:21:08,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700210846] [2023-08-04 01:21:08,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700210846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169398803] [2023-08-04 01:21:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:08,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:08,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:08,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:08,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 01:21:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:08,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:08,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:08,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169398803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:08,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 01:21:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055730305] [2023-08-04 01:21:08,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:08,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 01:21:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 01:21:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:21:08,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 265 [2023-08-04 01:21:08,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:08,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 265 [2023-08-04 01:21:08,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:08,496 INFO L124 PetriNetUnfolderBase]: 471/901 cut-off events. [2023-08-04 01:21:08,496 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2023-08-04 01:21:08,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 901 events. 471/901 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3761 event pairs, 35 based on Foata normal form. 63/853 useless extension candidates. Maximal degree in co-relation 2096. Up to 299 conditions per place. [2023-08-04 01:21:08,500 INFO L140 encePairwiseOnDemand]: 256/265 looper letters, 101 selfloop transitions, 10 changer transitions 2/119 dead transitions. [2023-08-04 01:21:08,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 638 flow [2023-08-04 01:21:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 01:21:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 01:21:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1032 transitions. [2023-08-04 01:21:08,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2023-08-04 01:21:08,503 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1032 transitions. [2023-08-04 01:21:08,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1032 transitions. [2023-08-04 01:21:08,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:08,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1032 transitions. [2023-08-04 01:21:08,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,508 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,508 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 178 flow. Second operand 8 states and 1032 transitions. [2023-08-04 01:21:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 638 flow [2023-08-04 01:21:08,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 634 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:08,512 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 231 flow [2023-08-04 01:21:08,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=231, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-04 01:21:08,512 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-08-04 01:21:08,513 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 231 flow [2023-08-04 01:21:08,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:08,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:08,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:08,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 01:21:08,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:08,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1682843191, now seen corresponding path program 1 times [2023-08-04 01:21:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267434586] [2023-08-04 01:21:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:08,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:08,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267434586] [2023-08-04 01:21:08,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267434586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:08,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871468873] [2023-08-04 01:21:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:08,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:08,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:08,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:08,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 01:21:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:08,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:08,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:08,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871468873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:08,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:08,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:21:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163833411] [2023-08-04 01:21:08,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:08,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 01:21:08,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:08,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:08,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 01:21:08,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:09,076 INFO L124 PetriNetUnfolderBase]: 359/718 cut-off events. [2023-08-04 01:21:09,077 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-08-04 01:21:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 718 events. 359/718 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2816 event pairs, 143 based on Foata normal form. 16/650 useless extension candidates. Maximal degree in co-relation 1923. Up to 361 conditions per place. [2023-08-04 01:21:09,079 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 01:21:09,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 404 flow [2023-08-04 01:21:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-04 01:21:09,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-08-04 01:21:09,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-04 01:21:09,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-04 01:21:09,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:09,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-04 01:21:09,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:09,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:09,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:09,084 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 231 flow. Second operand 4 states and 545 transitions. [2023-08-04 01:21:09,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 404 flow [2023-08-04 01:21:09,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 01:21:09,087 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 232 flow [2023-08-04 01:21:09,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2023-08-04 01:21:09,088 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 24 predicate places. [2023-08-04 01:21:09,088 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 232 flow [2023-08-04 01:21:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:09,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:09,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 01:21:09,294 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:09,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -524067874, now seen corresponding path program 1 times [2023-08-04 01:21:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901588062] [2023-08-04 01:21:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:21:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901588062] [2023-08-04 01:21:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901588062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917202229] [2023-08-04 01:21:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:10,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:10,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:10,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:10,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 01:21:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:10,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 01:21:10,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:10,232 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 01:21:10,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 01:21:10,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:10,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:10,360 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 [2023-08-04 01:21:10,376 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 [2023-08-04 01:21:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:10,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917202229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:10,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:10,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-08-04 01:21:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736815527] [2023-08-04 01:21:10,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:10,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 01:21:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 01:21:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-04 01:21:11,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 265 [2023-08-04 01:21:11,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 232 flow. Second operand has 20 states, 20 states have (on average 103.8) internal successors, (2076), 20 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:11,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:11,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 265 [2023-08-04 01:21:11,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:13,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:21:16,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:21:18,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:21:20,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:21:20,775 INFO L124 PetriNetUnfolderBase]: 1374/2277 cut-off events. [2023-08-04 01:21:20,776 INFO L125 PetriNetUnfolderBase]: For 2886/2886 co-relation queries the response was YES. [2023-08-04 01:21:20,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6080 conditions, 2277 events. 1374/2277 cut-off events. For 2886/2886 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11129 event pairs, 164 based on Foata normal form. 0/1903 useless extension candidates. Maximal degree in co-relation 6062. Up to 591 conditions per place. [2023-08-04 01:21:20,789 INFO L140 encePairwiseOnDemand]: 254/265 looper letters, 247 selfloop transitions, 79 changer transitions 0/331 dead transitions. [2023-08-04 01:21:20,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 331 transitions, 2194 flow [2023-08-04 01:21:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-04 01:21:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-04 01:21:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3164 transitions. [2023-08-04 01:21:20,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41171112556929085 [2023-08-04 01:21:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3164 transitions. [2023-08-04 01:21:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3164 transitions. [2023-08-04 01:21:20,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:20,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3164 transitions. [2023-08-04 01:21:20,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 109.10344827586206) internal successors, (3164), 29 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:20,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 265.0) internal successors, (7950), 30 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:20,816 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 265.0) internal successors, (7950), 30 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:20,816 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 232 flow. Second operand 29 states and 3164 transitions. [2023-08-04 01:21:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 331 transitions, 2194 flow [2023-08-04 01:21:20,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 331 transitions, 2135 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:20,825 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 667 flow [2023-08-04 01:21:20,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=667, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2023-08-04 01:21:20,826 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 62 predicate places. [2023-08-04 01:21:20,826 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 667 flow [2023-08-04 01:21:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 103.8) internal successors, (2076), 20 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:20,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:20,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:20,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:21,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:21,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:21,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1421850594, now seen corresponding path program 2 times [2023-08-04 01:21:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:21,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645185619] [2023-08-04 01:21:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:21,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:21:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645185619] [2023-08-04 01:21:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645185619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545422232] [2023-08-04 01:21:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:21:21,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:21,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:21,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 01:21:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:21:21,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:21:21,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-04 01:21:21,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:21,512 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 01:21:21,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 01:21:21,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:21,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:21,625 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 [2023-08-04 01:21:21,645 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 [2023-08-04 01:21:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:21:21,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:21:21,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545422232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:21,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:21,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-04 01:21:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546176327] [2023-08-04 01:21:21,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:21,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 01:21:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 01:21:21,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=157, Unknown=1, NotChecked=0, Total=210 [2023-08-04 01:21:22,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 265 [2023-08-04 01:21:22,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 667 flow. Second operand has 15 states, 15 states have (on average 101.26666666666667) internal successors, (1519), 15 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:22,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:22,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 265 [2023-08-04 01:21:22,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:24,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:21:24,976 INFO L124 PetriNetUnfolderBase]: 2568/4027 cut-off events. [2023-08-04 01:21:24,976 INFO L125 PetriNetUnfolderBase]: For 18787/18787 co-relation queries the response was YES. [2023-08-04 01:21:24,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16173 conditions, 4027 events. 2568/4027 cut-off events. For 18787/18787 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20561 event pairs, 289 based on Foata normal form. 140/3991 useless extension candidates. Maximal degree in co-relation 16143. Up to 895 conditions per place. [2023-08-04 01:21:24,998 INFO L140 encePairwiseOnDemand]: 255/265 looper letters, 226 selfloop transitions, 119 changer transitions 0/349 dead transitions. [2023-08-04 01:21:24,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 349 transitions, 2647 flow [2023-08-04 01:21:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 01:21:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 01:21:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1676 transitions. [2023-08-04 01:21:25,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39528301886792455 [2023-08-04 01:21:25,002 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1676 transitions. [2023-08-04 01:21:25,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1676 transitions. [2023-08-04 01:21:25,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:25,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1676 transitions. [2023-08-04 01:21:25,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.75) internal successors, (1676), 16 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:25,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:25,011 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:25,012 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 667 flow. Second operand 16 states and 1676 transitions. [2023-08-04 01:21:25,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 349 transitions, 2647 flow [2023-08-04 01:21:25,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 349 transitions, 2639 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:25,054 INFO L231 Difference]: Finished difference. Result has 130 places, 203 transitions, 1521 flow [2023-08-04 01:21:25,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1521, PETRI_PLACES=130, PETRI_TRANSITIONS=203} [2023-08-04 01:21:25,054 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 83 predicate places. [2023-08-04 01:21:25,054 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 203 transitions, 1521 flow [2023-08-04 01:21:25,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 101.26666666666667) internal successors, (1519), 15 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:25,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:25,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:25,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:25,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:25,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:25,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:25,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1792592459, now seen corresponding path program 1 times [2023-08-04 01:21:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486150903] [2023-08-04 01:21:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:21:25,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486150903] [2023-08-04 01:21:25,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486150903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295383948] [2023-08-04 01:21:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:25,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:25,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:25,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 01:21:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:26,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-04 01:21:26,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:26,167 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:21:26,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 24 treesize of output 19 [2023-08-04 01:21:26,213 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:21:26,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 01:21:26,287 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:21:26,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-08-04 01:21:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:21:26,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:26,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 01:21:26,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 209 [2023-08-04 01:21:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:21:26,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295383948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:26,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:26,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-04 01:21:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927462024] [2023-08-04 01:21:26,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 01:21:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 01:21:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-08-04 01:21:28,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 265 [2023-08-04 01:21:28,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 203 transitions, 1521 flow. Second operand has 24 states, 24 states have (on average 99.08333333333333) internal successors, (2378), 24 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:28,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:28,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 265 [2023-08-04 01:21:28,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:35,695 INFO L124 PetriNetUnfolderBase]: 5037/7858 cut-off events. [2023-08-04 01:21:35,695 INFO L125 PetriNetUnfolderBase]: For 50812/50812 co-relation queries the response was YES. [2023-08-04 01:21:35,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40677 conditions, 7858 events. 5037/7858 cut-off events. For 50812/50812 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45621 event pairs, 414 based on Foata normal form. 220/8037 useless extension candidates. Maximal degree in co-relation 40639. Up to 3137 conditions per place. [2023-08-04 01:21:35,748 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 725 selfloop transitions, 517 changer transitions 0/1246 dead transitions. [2023-08-04 01:21:35,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1246 transitions, 12257 flow [2023-08-04 01:21:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-04 01:21:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-04 01:21:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 10017 transitions. [2023-08-04 01:21:35,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38969072164948454 [2023-08-04 01:21:35,762 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 10017 transitions. [2023-08-04 01:21:35,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 10017 transitions. [2023-08-04 01:21:35,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:35,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 10017 transitions. [2023-08-04 01:21:35,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 103.26804123711341) internal successors, (10017), 97 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:35,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:35,817 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:35,817 INFO L175 Difference]: Start difference. First operand has 130 places, 203 transitions, 1521 flow. Second operand 97 states and 10017 transitions. [2023-08-04 01:21:35,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1246 transitions, 12257 flow [2023-08-04 01:21:36,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1246 transitions, 11603 flow, removed 327 selfloop flow, removed 0 redundant places. [2023-08-04 01:21:36,099 INFO L231 Difference]: Finished difference. Result has 271 places, 664 transitions, 6893 flow [2023-08-04 01:21:36,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=6893, PETRI_PLACES=271, PETRI_TRANSITIONS=664} [2023-08-04 01:21:36,099 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 224 predicate places. [2023-08-04 01:21:36,100 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 664 transitions, 6893 flow [2023-08-04 01:21:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.08333333333333) internal successors, (2378), 24 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:36,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:36,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:36,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 01:21:36,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:36,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:36,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1310261849, now seen corresponding path program 2 times [2023-08-04 01:21:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730775132] [2023-08-04 01:21:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:21:36,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730775132] [2023-08-04 01:21:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730775132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070429951] [2023-08-04 01:21:36,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:21:36,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:36,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:36,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:36,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 01:21:37,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:21:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:21:37,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-04 01:21:37,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:37,174 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:21:37,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 24 treesize of output 19 [2023-08-04 01:21:37,214 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:21:37,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 01:21:37,279 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 16 treesize of output 8 [2023-08-04 01:21:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 01:21:37,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:37,458 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 01:21:37,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 209 [2023-08-04 01:21:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 01:21:37,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070429951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:37,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:37,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-08-04 01:21:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822900529] [2023-08-04 01:21:37,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 01:21:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 01:21:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2023-08-04 01:21:39,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 265 [2023-08-04 01:21:39,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 664 transitions, 6893 flow. Second operand has 24 states, 24 states have (on average 98.45833333333333) internal successors, (2363), 24 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:39,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:39,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 265 [2023-08-04 01:21:39,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:48,020 INFO L124 PetriNetUnfolderBase]: 7978/12314 cut-off events. [2023-08-04 01:21:48,020 INFO L125 PetriNetUnfolderBase]: For 115637/115637 co-relation queries the response was YES. [2023-08-04 01:21:48,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79968 conditions, 12314 events. 7978/12314 cut-off events. For 115637/115637 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 76565 event pairs, 737 based on Foata normal form. 228/12536 useless extension candidates. Maximal degree in co-relation 79884. Up to 5048 conditions per place. [2023-08-04 01:21:48,135 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 910 selfloop transitions, 832 changer transitions 0/1746 dead transitions. [2023-08-04 01:21:48,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1746 transitions, 21288 flow [2023-08-04 01:21:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-08-04 01:21:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-08-04 01:21:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 9620 transitions. [2023-08-04 01:21:48,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861902850260939 [2023-08-04 01:21:48,146 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 9620 transitions. [2023-08-04 01:21:48,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 9620 transitions. [2023-08-04 01:21:48,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:48,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 9620 transitions. [2023-08-04 01:21:48,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 102.34042553191489) internal successors, (9620), 94 states have internal predecessors, (9620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:48,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 265.0) internal successors, (25175), 95 states have internal predecessors, (25175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:48,184 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 265.0) internal successors, (25175), 95 states have internal predecessors, (25175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:48,185 INFO L175 Difference]: Start difference. First operand has 271 places, 664 transitions, 6893 flow. Second operand 94 states and 9620 transitions. [2023-08-04 01:21:48,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1746 transitions, 21288 flow [2023-08-04 01:21:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1746 transitions, 20084 flow, removed 558 selfloop flow, removed 11 redundant places. [2023-08-04 01:21:49,401 INFO L231 Difference]: Finished difference. Result has 396 places, 1142 transitions, 13983 flow [2023-08-04 01:21:49,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=13983, PETRI_PLACES=396, PETRI_TRANSITIONS=1142} [2023-08-04 01:21:49,402 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 349 predicate places. [2023-08-04 01:21:49,402 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1142 transitions, 13983 flow [2023-08-04 01:21:49,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 98.45833333333333) internal successors, (2363), 24 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:49,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:49,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:49,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 01:21:49,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:49,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:49,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1521121379, now seen corresponding path program 1 times [2023-08-04 01:21:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:49,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283651292] [2023-08-04 01:21:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:21:50,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:50,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283651292] [2023-08-04 01:21:50,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283651292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:50,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276585658] [2023-08-04 01:21:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:50,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:50,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:50,277 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:21:50,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 01:21:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:50,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-04 01:21:50,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:50,437 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 01:21:50,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 01:21:50,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:50,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:21:50,611 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 [2023-08-04 01:21:50,631 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 [2023-08-04 01:21:50,799 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:21:50,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 18 [2023-08-04 01:21:50,956 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 01:21:50,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 01:21:51,037 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:21:51,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:21:51,110 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:21:51,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:21:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 01:21:51,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:21:51,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276585658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:51,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:51,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 35 [2023-08-04 01:21:51,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316393355] [2023-08-04 01:21:51,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:51,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 01:21:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 01:21:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-08-04 01:21:59,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-04 01:21:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1142 transitions, 13983 flow. Second operand has 36 states, 36 states have (on average 96.58333333333333) internal successors, (3477), 36 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-04 01:21:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:22:59,453 INFO L124 PetriNetUnfolderBase]: 13529/20945 cut-off events. [2023-08-04 01:22:59,454 INFO L125 PetriNetUnfolderBase]: For 397338/397338 co-relation queries the response was YES. [2023-08-04 01:22:59,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159418 conditions, 20945 events. 13529/20945 cut-off events. For 397338/397338 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 142067 event pairs, 1265 based on Foata normal form. 150/21092 useless extension candidates. Maximal degree in co-relation 159295. Up to 11456 conditions per place. [2023-08-04 01:22:59,694 INFO L140 encePairwiseOnDemand]: 250/265 looper letters, 1768 selfloop transitions, 970 changer transitions 49/2791 dead transitions. [2023-08-04 01:22:59,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2791 transitions, 39019 flow [2023-08-04 01:22:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-08-04 01:22:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-08-04 01:22:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 10950 transitions. [2023-08-04 01:22:59,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38259958071278827 [2023-08-04 01:22:59,707 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 10950 transitions. [2023-08-04 01:22:59,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 10950 transitions. [2023-08-04 01:22:59,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:22:59,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 10950 transitions. [2023-08-04 01:22:59,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 101.38888888888889) internal successors, (10950), 108 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:59,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 265.0) internal successors, (28885), 109 states have internal predecessors, (28885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:59,750 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 265.0) internal successors, (28885), 109 states have internal predecessors, (28885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:59,751 INFO L175 Difference]: Start difference. First operand has 396 places, 1142 transitions, 13983 flow. Second operand 108 states and 10950 transitions. [2023-08-04 01:22:59,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2791 transitions, 39019 flow [2023-08-04 01:23:07,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2791 transitions, 36843 flow, removed 694 selfloop flow, removed 24 redundant places. [2023-08-04 01:23:07,521 INFO L231 Difference]: Finished difference. Result has 546 places, 1970 transitions, 27479 flow [2023-08-04 01:23:07,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=12513, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=27479, PETRI_PLACES=546, PETRI_TRANSITIONS=1970} [2023-08-04 01:23:07,522 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 499 predicate places. [2023-08-04 01:23:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1970 transitions, 27479 flow [2023-08-04 01:23:07,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 96.58333333333333) internal successors, (3477), 36 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:07,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:23:07,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:23:07,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 01:23:07,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:23:07,724 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:23:07,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:23:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -365173193, now seen corresponding path program 2 times [2023-08-04 01:23:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:23:07,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116910308] [2023-08-04 01:23:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:23:07,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:23:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:23:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 01:23:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:23:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116910308] [2023-08-04 01:23:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116910308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:23:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726879362] [2023-08-04 01:23:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:23:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:23:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:23:08,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:23:08,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 01:23:08,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:23:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:23:08,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 01:23:08,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:23:08,460 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-04 01:23:08,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-08-04 01:23:08,495 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 [2023-08-04 01:23:08,514 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 [2023-08-04 01:23:08,613 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 [2023-08-04 01:23:08,631 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 [2023-08-04 01:23:08,839 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 [2023-08-04 01:23:08,892 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 19 treesize of output 18 [2023-08-04 01:23:08,959 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 19 treesize of output 18 [2023-08-04 01:23:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:23:09,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:23:09,178 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 3288 treesize of output 3224 [2023-08-04 01:23:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:23:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726879362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:23:09,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:23:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 32 [2023-08-04 01:23:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852333043] [2023-08-04 01:23:09,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:23:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-04 01:23:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:23:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-04 01:23:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2023-08-04 01:23:13,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-04 01:23:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1970 transitions, 27479 flow. Second operand has 33 states, 33 states have (on average 96.6969696969697) internal successors, (3191), 33 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:13,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:23:13,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-04 01:23:13,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:23:33,067 INFO L124 PetriNetUnfolderBase]: 20222/31265 cut-off events. [2023-08-04 01:23:33,068 INFO L125 PetriNetUnfolderBase]: For 901735/901735 co-relation queries the response was YES. [2023-08-04 01:23:33,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261148 conditions, 31265 events. 20222/31265 cut-off events. For 901735/901735 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 226370 event pairs, 2476 based on Foata normal form. 148/31398 useless extension candidates. Maximal degree in co-relation 260973. Up to 20818 conditions per place. [2023-08-04 01:23:33,905 INFO L140 encePairwiseOnDemand]: 250/265 looper letters, 2583 selfloop transitions, 1087 changer transitions 24/3698 dead transitions. [2023-08-04 01:23:33,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 3698 transitions, 58513 flow [2023-08-04 01:23:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-04 01:23:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-04 01:23:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 9575 transitions. [2023-08-04 01:23:33,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38033763654419067 [2023-08-04 01:23:33,912 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 9575 transitions. [2023-08-04 01:23:33,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 9575 transitions. [2023-08-04 01:23:33,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:23:33,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 9575 transitions. [2023-08-04 01:23:33,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 100.78947368421052) internal successors, (9575), 95 states have internal predecessors, (9575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:33,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 265.0) internal successors, (25440), 96 states have internal predecessors, (25440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:33,943 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 265.0) internal successors, (25440), 96 states have internal predecessors, (25440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:33,943 INFO L175 Difference]: Start difference. First operand has 546 places, 1970 transitions, 27479 flow. Second operand 95 states and 9575 transitions. [2023-08-04 01:23:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 3698 transitions, 58513 flow [2023-08-04 01:23:58,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 3698 transitions, 56119 flow, removed 1096 selfloop flow, removed 17 redundant places. [2023-08-04 01:23:58,699 INFO L231 Difference]: Finished difference. Result has 669 places, 2911 transitions, 44565 flow [2023-08-04 01:23:58,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=25919, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=44565, PETRI_PLACES=669, PETRI_TRANSITIONS=2911} [2023-08-04 01:23:58,701 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 622 predicate places. [2023-08-04 01:23:58,701 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 2911 transitions, 44565 flow [2023-08-04 01:23:58,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.6969696969697) internal successors, (3191), 33 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:58,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:23:58,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:23:58,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 01:23:58,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:23:58,908 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:23:58,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:23:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2008043430, now seen corresponding path program 1 times [2023-08-04 01:23:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:23:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836710324] [2023-08-04 01:23:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:23:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:23:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:23:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 01:23:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:23:59,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836710324] [2023-08-04 01:23:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836710324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:23:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161802485] [2023-08-04 01:23:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:23:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:23:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:23:59,548 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:23:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 01:23:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:23:59,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-04 01:23:59,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:23:59,723 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 01:23:59,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2023-08-04 01:23:59,790 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 01:23:59,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 18 treesize of output 24 [2023-08-04 01:23:59,971 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 01:23:59,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 30 treesize of output 36 [2023-08-04 01:24:00,048 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 01:24:00,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 30 treesize of output 36 [2023-08-04 01:24:00,270 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:24:00,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 35 treesize of output 26 [2023-08-04 01:24:00,374 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:24:00,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2023-08-04 01:24:00,496 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:24:00,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2023-08-04 01:24:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:24:00,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:24:03,143 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_~v~0.base_159 Int) (v_ArrVal_770 Int) (v_ArrVal_768 Int) (v_ArrVal_764 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_764))) (let ((.cse0 (select (select .cse1 3) 0))) (or (= .cse0 0) (not (= (select (select (store .cse1 v_~v~0.base_159 (store (store (store (select .cse1 v_~v~0.base_159) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| .cse0) (+ |c_thread1Thread2of2ForFork0_#t~malloc3.offset| 1) v_ArrVal_768) (+ 2 |c_thread1Thread2of2ForFork0_#t~malloc3.offset|) v_ArrVal_770)) 3) 0) 0)) (< |c_thread1Thread2of2ForFork0_#t~malloc3.base| v_~v~0.base_159))))) is different from false [2023-08-04 01:24:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:24:03,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161802485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:24:03,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:24:03,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 34 [2023-08-04 01:24:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220875208] [2023-08-04 01:24:03,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:24:03,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 01:24:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:24:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 01:24:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=929, Unknown=2, NotChecked=62, Total=1122 [2023-08-04 01:24:03,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 265 [2023-08-04 01:24:03,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 2911 transitions, 44565 flow. Second operand has 34 states, 34 states have (on average 70.70588235294117) internal successors, (2404), 34 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:03,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:24:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 265 [2023-08-04 01:24:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:24:35,983 INFO L124 PetriNetUnfolderBase]: 24592/38259 cut-off events. [2023-08-04 01:24:35,984 INFO L125 PetriNetUnfolderBase]: For 1270636/1270636 co-relation queries the response was YES. [2023-08-04 01:24:37,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330829 conditions, 38259 events. 24592/38259 cut-off events. For 1270636/1270636 co-relation queries the response was YES. Maximal size of possible extension queue 1805. Compared 287555 event pairs, 1015 based on Foata normal form. 688/38940 useless extension candidates. Maximal degree in co-relation 330612. Up to 15224 conditions per place. [2023-08-04 01:24:37,599 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 2068 selfloop transitions, 2393 changer transitions 0/4465 dead transitions. [2023-08-04 01:24:37,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 4465 transitions, 74747 flow [2023-08-04 01:24:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-04 01:24:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-04 01:24:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 7303 transitions. [2023-08-04 01:24:37,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28120908740854833 [2023-08-04 01:24:37,608 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 7303 transitions. [2023-08-04 01:24:37,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 7303 transitions. [2023-08-04 01:24:37,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:24:37,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 7303 transitions. [2023-08-04 01:24:37,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 74.5204081632653) internal successors, (7303), 98 states have internal predecessors, (7303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:37,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 265.0) internal successors, (26235), 99 states have internal predecessors, (26235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 265.0) internal successors, (26235), 99 states have internal predecessors, (26235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:37,641 INFO L175 Difference]: Start difference. First operand has 669 places, 2911 transitions, 44565 flow. Second operand 98 states and 7303 transitions. [2023-08-04 01:24:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 4465 transitions, 74747 flow [2023-08-04 01:25:15,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 4465 transitions, 71527 flow, removed 1583 selfloop flow, removed 12 redundant places. [2023-08-04 01:25:15,981 INFO L231 Difference]: Finished difference. Result has 776 places, 3671 transitions, 61242 flow [2023-08-04 01:25:15,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=42021, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=61242, PETRI_PLACES=776, PETRI_TRANSITIONS=3671} [2023-08-04 01:25:15,984 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 729 predicate places. [2023-08-04 01:25:15,984 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 3671 transitions, 61242 flow [2023-08-04 01:25:15,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.70588235294117) internal successors, (2404), 34 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:15,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:15,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:15,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 01:25:16,193 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:16,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 380777093, now seen corresponding path program 3 times [2023-08-04 01:25:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554952414] [2023-08-04 01:25:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 01:25:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554952414] [2023-08-04 01:25:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554952414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693293058] [2023-08-04 01:25:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 01:25:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:16,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:25:16,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 01:25:16,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 01:25:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:25:16,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-04 01:25:16,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:17,013 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 01:25:17,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 01:25:17,034 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 [2023-08-04 01:25:17,053 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 [2023-08-04 01:25:17,162 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 [2023-08-04 01:25:17,184 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 [2023-08-04 01:25:17,295 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:25:17,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 18 [2023-08-04 01:25:17,443 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 01:25:17,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 01:25:17,523 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:25:17,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:25:17,613 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:25:17,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:25:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:25:17,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:18,340 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_827 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_827))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) c_~v~0.offset (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 01:25:18,362 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_827 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_827))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 01:25:18,371 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_827 (Array Int Int))) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_827))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) 0 (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 01:25:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 14 not checked. [2023-08-04 01:25:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693293058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:18,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:18,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 35 [2023-08-04 01:25:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794597548] [2023-08-04 01:25:18,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 01:25:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 01:25:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=932, Unknown=3, NotChecked=192, Total=1260 [2023-08-04 01:25:18,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 265 [2023-08-04 01:25:18,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 3671 transitions, 61242 flow. Second operand has 36 states, 36 states have (on average 70.66666666666667) internal successors, (2544), 36 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:18,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:18,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 265 [2023-08-04 01:25:18,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:26:15,788 INFO L124 PetriNetUnfolderBase]: 27585/42947 cut-off events. [2023-08-04 01:26:15,788 INFO L125 PetriNetUnfolderBase]: For 1378958/1378958 co-relation queries the response was YES. [2023-08-04 01:26:17,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391305 conditions, 42947 events. 27585/42947 cut-off events. For 1378958/1378958 co-relation queries the response was YES. Maximal size of possible extension queue 2053. Compared 327227 event pairs, 3434 based on Foata normal form. 219/43147 useless extension candidates. Maximal degree in co-relation 391066. Up to 35014 conditions per place. [2023-08-04 01:26:17,700 INFO L140 encePairwiseOnDemand]: 244/265 looper letters, 3872 selfloop transitions, 756 changer transitions 27/4659 dead transitions. [2023-08-04 01:26:17,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 4659 transitions, 85755 flow [2023-08-04 01:26:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-04 01:26:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-04 01:26:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5151 transitions. [2023-08-04 01:26:17,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2858490566037736 [2023-08-04 01:26:17,707 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5151 transitions. [2023-08-04 01:26:17,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5151 transitions. [2023-08-04 01:26:17,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:26:17,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5151 transitions. [2023-08-04 01:26:17,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 75.75) internal successors, (5151), 68 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:17,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 265.0) internal successors, (18285), 69 states have internal predecessors, (18285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:17,727 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 265.0) internal successors, (18285), 69 states have internal predecessors, (18285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:17,727 INFO L175 Difference]: Start difference. First operand has 776 places, 3671 transitions, 61242 flow. Second operand 68 states and 5151 transitions. [2023-08-04 01:26:17,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 4659 transitions, 85755 flow [2023-08-04 01:27:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 4659 transitions, 83480 flow, removed 1094 selfloop flow, removed 10 redundant places. [2023-08-04 01:27:14,934 INFO L231 Difference]: Finished difference. Result has 863 places, 4132 transitions, 71024 flow [2023-08-04 01:27:14,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=59402, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=71024, PETRI_PLACES=863, PETRI_TRANSITIONS=4132} [2023-08-04 01:27:14,937 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 816 predicate places. [2023-08-04 01:27:14,937 INFO L495 AbstractCegarLoop]: Abstraction has has 863 places, 4132 transitions, 71024 flow [2023-08-04 01:27:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.66666666666667) internal successors, (2544), 36 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:14,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:27:14,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:27:14,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 01:27:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 01:27:15,139 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:27:15,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:27:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 539079827, now seen corresponding path program 4 times [2023-08-04 01:27:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:27:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442413129] [2023-08-04 01:27:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:27:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:27:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:27:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 01:27:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:27:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442413129] [2023-08-04 01:27:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442413129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:27:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114740652] [2023-08-04 01:27:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 01:27:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:27:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:27:15,786 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:27:15,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 01:27:15,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 01:27:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:27:15,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-04 01:27:15,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:27:15,938 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 01:27:15,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 01:27:15,959 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 [2023-08-04 01:27:15,978 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 [2023-08-04 01:27:16,073 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 [2023-08-04 01:27:16,090 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 [2023-08-04 01:27:16,296 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 [2023-08-04 01:27:16,354 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 19 treesize of output 18 [2023-08-04 01:27:16,423 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 19 treesize of output 18 [2023-08-04 01:27:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:27:16,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:27:16,631 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 402 treesize of output 394 [2023-08-04 01:27:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:27:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114740652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:27:17,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:27:17,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 32 [2023-08-04 01:27:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656192287] [2023-08-04 01:27:17,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:27:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-04 01:27:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:27:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-04 01:27:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2023-08-04 01:27:20,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 265 [2023-08-04 01:27:20,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 4132 transitions, 71024 flow. Second operand has 33 states, 33 states have (on average 97.6969696969697) internal successors, (3224), 33 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:20,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:27:20,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 265 [2023-08-04 01:27:20,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:28:08,516 INFO L124 PetriNetUnfolderBase]: 31430/48885 cut-off events. [2023-08-04 01:28:08,516 INFO L125 PetriNetUnfolderBase]: For 1514054/1514058 co-relation queries the response was YES. [2023-08-04 01:28:10,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452789 conditions, 48885 events. 31430/48885 cut-off events. For 1514054/1514058 co-relation queries the response was YES. Maximal size of possible extension queue 2337. Compared 377843 event pairs, 3431 based on Foata normal form. 212/49063 useless extension candidates. Maximal degree in co-relation 452520. Up to 35048 conditions per place. [2023-08-04 01:28:11,258 INFO L140 encePairwiseOnDemand]: 251/265 looper letters, 3950 selfloop transitions, 1323 changer transitions 34/5311 dead transitions. [2023-08-04 01:28:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 5311 transitions, 102651 flow [2023-08-04 01:28:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-04 01:28:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-04 01:28:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7353 transitions. [2023-08-04 01:28:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38537735849056604 [2023-08-04 01:28:11,264 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7353 transitions. [2023-08-04 01:28:11,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7353 transitions. [2023-08-04 01:28:11,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:28:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7353 transitions. [2023-08-04 01:28:11,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 102.125) internal successors, (7353), 72 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:11,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 265.0) internal successors, (19345), 73 states have internal predecessors, (19345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:11,286 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 265.0) internal successors, (19345), 73 states have internal predecessors, (19345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:11,287 INFO L175 Difference]: Start difference. First operand has 863 places, 4132 transitions, 71024 flow. Second operand 72 states and 7353 transitions. [2023-08-04 01:28:11,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 5311 transitions, 102651 flow [2023-08-04 01:29:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 914 places, 5311 transitions, 99476 flow, removed 1531 selfloop flow, removed 16 redundant places. [2023-08-04 01:29:20,357 INFO L231 Difference]: Finished difference. Result has 954 places, 4691 transitions, 85070 flow [2023-08-04 01:29:20,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=68029, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=85070, PETRI_PLACES=954, PETRI_TRANSITIONS=4691} [2023-08-04 01:29:20,360 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 907 predicate places. [2023-08-04 01:29:20,360 INFO L495 AbstractCegarLoop]: Abstraction has has 954 places, 4691 transitions, 85070 flow [2023-08-04 01:29:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.6969696969697) internal successors, (3224), 33 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:29:20,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:29:20,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:29:20,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 01:29:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 01:29:20,562 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:29:20,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:29:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1638390059, now seen corresponding path program 5 times [2023-08-04 01:29:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:29:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745631742] [2023-08-04 01:29:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:29:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:29:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:29:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 01:29:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:29:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745631742] [2023-08-04 01:29:21,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745631742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:29:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451730995] [2023-08-04 01:29:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-04 01:29:21,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:29:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:29:21,251 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:29:21,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 01:29:21,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-04 01:29:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:29:21,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-04 01:29:21,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:29:21,714 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-04 01:29:21,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-04 01:29:21,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:29:21,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:29:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 01:29:21,851 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 01:29:21,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2023-08-04 01:29:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 01:29:21,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 01:29:21,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 01:29:22,050 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 [2023-08-04 01:29:22,141 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 [2023-08-04 01:29:22,349 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 01:29:22,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 18 [2023-08-04 01:29:22,460 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 01:29:22,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 01:29:22,523 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:29:22,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:29:22,610 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 01:29:22,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 01:29:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:29:22,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:29:23,810 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_954 (Array Int Int)) (~v~0.offset Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_954))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) ~v~0.offset (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 01:29:30,396 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((|v_thread1Thread1of2ForFork0_#t~malloc3.base_50| Int) (|v_thread1Thread2of2ForFork0_#t~malloc3.base_53| Int) (v_ArrVal_952 Int)) (or (<= |c_#StackHeapBarrier| |v_thread1Thread2of2ForFork0_#t~malloc3.base_53|) (<= |c_#StackHeapBarrier| |v_thread1Thread1of2ForFork0_#t~malloc3.base_50|) (not (= (select (store |c_#valid| |v_thread1Thread1of2ForFork0_#t~malloc3.base_50| v_ArrVal_952) |v_thread1Thread2of2ForFork0_#t~malloc3.base_53|) 0)))) (forall ((~v~0.base Int) (v_ArrVal_954 (Array Int Int)) (v_ArrVal_951 (Array Int Int)) (~v~0.offset Int)) (= 66 (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_951) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_954))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) ~v~0.offset (select (select .cse0 3) 0)))) 3) 0)))) is different from false [2023-08-04 01:29:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2023-08-04 01:29:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451730995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:29:30,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:29:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 41 [2023-08-04 01:29:30,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866195617] [2023-08-04 01:29:30,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:29:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-04 01:29:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:29:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-04 01:29:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1400, Unknown=19, NotChecked=154, Total=1722 [2023-08-04 01:29:30,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 265 [2023-08-04 01:29:30,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 4691 transitions, 85070 flow. Second operand has 42 states, 42 states have (on average 70.28571428571429) internal successors, (2952), 42 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:29:30,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:29:30,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 265 [2023-08-04 01:29:30,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:38,734 INFO L124 PetriNetUnfolderBase]: 37112/57747 cut-off events. [2023-08-04 01:31:38,736 INFO L125 PetriNetUnfolderBase]: For 2097154/2097158 co-relation queries the response was YES. [2023-08-04 01:31:42,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559285 conditions, 57747 events. 37112/57747 cut-off events. For 2097154/2097158 co-relation queries the response was YES. Maximal size of possible extension queue 2814. Compared 459001 event pairs, 3122 based on Foata normal form. 187/57925 useless extension candidates. Maximal degree in co-relation 558979. Up to 42237 conditions per place. [2023-08-04 01:31:42,422 INFO L140 encePairwiseOnDemand]: 244/265 looper letters, 4756 selfloop transitions, 1420 changer transitions 35/6215 dead transitions. [2023-08-04 01:31:42,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1043 places, 6215 transitions, 125087 flow [2023-08-04 01:31:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-04 01:31:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-04 01:31:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7170 transitions. [2023-08-04 01:31:42,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818396226415094 [2023-08-04 01:31:42,428 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7170 transitions. [2023-08-04 01:31:42,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7170 transitions. [2023-08-04 01:31:42,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:42,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7170 transitions. [2023-08-04 01:31:42,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 74.6875) internal successors, (7170), 96 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:42,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 265.0) internal successors, (25705), 97 states have internal predecessors, (25705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:42,453 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 265.0) internal successors, (25705), 97 states have internal predecessors, (25705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:42,453 INFO L175 Difference]: Start difference. First operand has 954 places, 4691 transitions, 85070 flow. Second operand 96 states and 7170 transitions. [2023-08-04 01:31:42,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1043 places, 6215 transitions, 125087 flow [2023-08-04 01:33:33,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1021 places, 6215 transitions, 122494 flow, removed 1170 selfloop flow, removed 22 redundant places. [2023-08-04 01:33:33,787 INFO L231 Difference]: Finished difference. Result has 1062 places, 5502 transitions, 105809 flow [2023-08-04 01:33:33,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=82097, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=105809, PETRI_PLACES=1062, PETRI_TRANSITIONS=5502} [2023-08-04 01:33:33,791 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1015 predicate places. [2023-08-04 01:33:33,791 INFO L495 AbstractCegarLoop]: Abstraction has has 1062 places, 5502 transitions, 105809 flow [2023-08-04 01:33:33,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 70.28571428571429) internal successors, (2952), 42 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:33:33,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:33:33,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:33:33,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 01:33:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:33:33,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:33:33,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:33:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1877179644, now seen corresponding path program 3 times [2023-08-04 01:33:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:33:33,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679671602] [2023-08-04 01:33:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:33:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:33:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:33:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:33:34,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:33:34,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679671602] [2023-08-04 01:33:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679671602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:33:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002143955] [2023-08-04 01:33:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 01:33:34,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:33:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:33:34,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:33:34,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 01:33:34,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 01:33:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:33:34,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-04 01:33:34,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:33:34,811 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-04 01:33:34,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-04 01:33:34,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:33:34,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-08-04 01:33:34,960 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-04 01:33:34,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-04 01:33:35,071 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-04 01:33:35,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-04 01:33:35,150 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 [2023-08-04 01:33:35,214 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 [2023-08-04 01:33:35,220 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 [2023-08-04 01:33:35,256 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 [2023-08-04 01:33:35,265 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 [2023-08-04 01:33:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:33:35,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:33:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:33:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002143955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:33:35,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:33:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 13] total 30 [2023-08-04 01:33:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561571520] [2023-08-04 01:33:35,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:33:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-04 01:33:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:33:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-04 01:33:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=827, Unknown=3, NotChecked=0, Total=930 [2023-08-04 01:33:38,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:33:39,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 265 [2023-08-04 01:33:39,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1062 places, 5502 transitions, 105809 flow. Second operand has 31 states, 31 states have (on average 72.03225806451613) internal successors, (2233), 31 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:33:39,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:33:39,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 265 [2023-08-04 01:33:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:33:53,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 01:33:55,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-08-04 01:34:03,771 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 01:34:03,772 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 01:34:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-04 01:34:03,883 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 01:34:03,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 01:34:04,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-04 01:34:04,085 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 68/265 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 78100 conditions, 9096 events (5162/9095 cut-off events. For 398412/398418 co-relation queries the response was YES. Maximal size of possible extension queue 2348. Compared 83306 event pairs, 324 based on Foata normal form. 224/11664 useless extension candidates. Maximal degree in co-relation 77764. Up to 3492 conditions per place.). [2023-08-04 01:34:04,086 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:34:04,086 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (2/2) [2023-08-04 01:34:04,088 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 01:34:04,088 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 01:34:04,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 01:34:04 BasicIcfg [2023-08-04 01:34:04,095 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 01:34:04,096 INFO L158 Benchmark]: Toolchain (without parser) took 796824.41ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 446.0MB in the beginning and 7.4GB in the end (delta: -7.0GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2023-08-04 01:34:04,096 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 294.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:34:04,096 INFO L158 Benchmark]: CACSL2BoogieTranslator took 548.43ms. Allocated memory is still 497.0MB. Free memory was 446.0MB in the beginning and 413.2MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-04 01:34:04,097 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.58ms. Allocated memory is still 497.0MB. Free memory was 413.2MB in the beginning and 410.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:34:04,097 INFO L158 Benchmark]: Boogie Preprocessor took 24.90ms. Allocated memory is still 497.0MB. Free memory was 410.8MB in the beginning and 409.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:34:04,097 INFO L158 Benchmark]: RCFGBuilder took 474.49ms. Allocated memory is still 497.0MB. Free memory was 409.0MB in the beginning and 452.5MB in the end (delta: -43.5MB). Peak memory consumption was 11.7MB. Max. memory is 16.0GB. [2023-08-04 01:34:04,097 INFO L158 Benchmark]: TraceAbstraction took 795729.06ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 451.4MB in the beginning and 7.4GB in the end (delta: -7.0GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. [2023-08-04 01:34:04,099 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 294.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 548.43ms. Allocated memory is still 497.0MB. Free memory was 446.0MB in the beginning and 413.2MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.58ms. Allocated memory is still 497.0MB. Free memory was 413.2MB in the beginning and 410.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.90ms. Allocated memory is still 497.0MB. Free memory was 410.8MB in the beginning and 409.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 474.49ms. Allocated memory is still 497.0MB. Free memory was 409.0MB in the beginning and 452.5MB in the end (delta: -43.5MB). Peak memory consumption was 11.7MB. Max. memory is 16.0GB. * TraceAbstraction took 795729.06ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 451.4MB in the beginning and 7.4GB in the end (delta: -7.0GB). Peak memory consumption was 5.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 109 PlacesBefore, 32 PlacesAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 2496 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 100 TotalNumberOfCompositions, 4155 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2877, independent: 2774, independent conditional: 0, independent unconditional: 2774, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1463, independent: 1428, independent conditional: 0, independent unconditional: 1428, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2877, independent: 1346, independent conditional: 0, independent unconditional: 1346, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 1463, unknown conditional: 0, unknown unconditional: 1463] , Statistics on independence cache: Total cache size (in pairs): 97, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 136 PlacesBefore, 48 PlacesAfterwards, 145 TransitionsBefore, 52 TransitionsAfterwards, 6648 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 31 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 15043 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9333, independent: 9129, independent conditional: 0, independent unconditional: 9129, dependent: 204, dependent conditional: 0, dependent unconditional: 204, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3826, independent: 3773, independent conditional: 0, independent unconditional: 3773, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9333, independent: 5356, independent conditional: 0, independent unconditional: 5356, dependent: 151, dependent conditional: 0, dependent unconditional: 151, unknown: 3826, unknown conditional: 0, unknown unconditional: 3826] , Statistics on independence cache: Total cache size (in pairs): 259, Positive cache size: 241, Positive conditional cache size: 0, Positive unconditional cache size: 241, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 135 PlacesBefore, 47 PlacesAfterwards, 144 TransitionsBefore, 51 TransitionsAfterwards, 6624 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 32 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 14945 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9644, independent: 9441, independent conditional: 0, independent unconditional: 9441, dependent: 203, dependent conditional: 0, dependent unconditional: 203, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3871, independent: 3815, independent conditional: 0, independent unconditional: 3815, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9644, independent: 5626, independent conditional: 0, independent unconditional: 5626, dependent: 147, dependent conditional: 0, dependent unconditional: 147, unknown: 3871, unknown conditional: 0, unknown unconditional: 3871] , Statistics on independence cache: Total cache size (in pairs): 308, Positive cache size: 290, Positive conditional cache size: 0, Positive unconditional cache size: 290, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 68/265 universal loopers) in iteration 21,while PetriNetUnfolder was constructing finite prefix that currently has 78100 conditions, 9096 events (5162/9095 cut-off events. For 398412/398418 co-relation queries the response was YES. Maximal size of possible extension queue 2348. Compared 83306 event pairs, 324 based on Foata normal form. 224/11664 useless extension candidates. Maximal degree in co-relation 77764. Up to 3492 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 128 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: 3.0s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred 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 7 procedures, 151 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: 8.1s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 186 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 533 IncrementalHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 8 mSDtfsCounter, 533 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=0, InterpolantAutomatonStates: 24, 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, 0.7s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 430 SizeOfPredicates, 0 NumberOfNonLiveVariables, 835 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 138/155 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 7 procedures, 151 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: 784.5s, OverallIterations: 21, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 746.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 295 mSolverCounterUnknown, 11958 SdHoareTripleChecker+Valid, 107.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11481 mSDsluCounter, 26923 SdHoareTripleChecker+Invalid, 100.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4037 IncrementalHoareTripleChecker+Unchecked, 26814 mSDsCounter, 2039 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74363 IncrementalHoareTripleChecker+Invalid, 80734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2039 mSolverCounterUnsat, 109 mSDtfsCounter, 74363 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2461 GetRequests, 1347 SyntacticMatches, 31 SemanticMatches, 1083 ConstructedPredicates, 6 IntricatePredicates, 3 DeprecatedPredicates, 33627 ImplicationChecksByTransitivity, 140.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105809occurred in iteration=20, InterpolantAutomatonStates: 812, 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: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 27.8s InterpolantComputationTime, 1655 NumberOfCodeBlocks, 1626 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 2326 ConstructedInterpolants, 276 QuantifiedInterpolants, 29871 SizeOfPredicates, 177 NumberOfNonLiveVariables, 4851 ConjunctsInSsa, 601 ConjunctsInUnsatCore, 55 InterpolantComputations, 6 PerfectInterpolantSequences, 551/1017 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown