/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/weaver_chl-match-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:05:29,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:05:29,312 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:05:29,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:05:29,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:05:29,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:05:29,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:05:29,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:05:29,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:05:29,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:05:29,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:05:29,341 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:05:29,342 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:05:29,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:05:29,343 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:05:29,344 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:05:29,345 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:05:29,345 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:05:29,345 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:05:29,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:05:29,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:05:29,347 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:05:29,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:05:29,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:05:29,348 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:05:29,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:05:29,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:05:29,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:05:29,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:05:29,556 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:05:29,556 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:05:29,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c [2023-08-04 02:05:30,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:05:30,727 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:05:30,728 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c [2023-08-04 02:05:30,735 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae500304/738c67499c18483798ea1d68df24136f/FLAGaf2012bc2 [2023-08-04 02:05:30,744 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae500304/738c67499c18483798ea1d68df24136f [2023-08-04 02:05:30,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:05:30,746 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:05:30,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:05:30,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:05:30,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:05:30,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e4a8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30, skipping insertion in model container [2023-08-04 02:05:30,750 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,765 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:05:30,889 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c[3197,3210] [2023-08-04 02:05:30,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:05:30,899 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:05:30,920 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c[3197,3210] [2023-08-04 02:05:30,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:05:30,933 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:05:30,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30 WrapperNode [2023-08-04 02:05:30,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:05:30,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:05:30,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:05:30,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:05:30,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,948 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,969 INFO L138 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 11, calls inlined = 21, statements flattened = 259 [2023-08-04 02:05:30,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:05:30,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:05:30,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:05:30,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:05:30,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,995 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:30,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:31,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:05:31,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:05:31,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:05:31,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:05:31,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (1/1) ... [2023-08-04 02:05:31,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:05:31,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:31,043 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 02:05:31,059 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 02:05:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:05:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:05:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:05:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:05:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:05:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:05:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:05:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:05:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:05:31,084 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 02:05:31,166 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:05:31,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:05:31,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:05:31,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:05:31,523 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:05:31,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:05:31 BoogieIcfgContainer [2023-08-04 02:05:31,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:05:31,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:05:31,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:05:31,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:05:31,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:05:30" (1/3) ... [2023-08-04 02:05:31,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d11acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:05:31, skipping insertion in model container [2023-08-04 02:05:31,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:05:30" (2/3) ... [2023-08-04 02:05:31,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d11acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:05:31, skipping insertion in model container [2023-08-04 02:05:31,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:05:31" (3/3) ... [2023-08-04 02:05:31,536 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-match-trans.wvr_bound2.c [2023-08-04 02:05:31,541 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:05:31,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:05:31,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:05:31,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:05:31,628 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:05:31,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:31,912 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 02:05:31,912 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 02:05:31,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 02:05:31,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:31,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:31,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:05:31,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:31,958 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:31,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 02:05:32,078 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 02:05:32,078 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 02:05:32,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 02:05:32,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 34968 [2023-08-04 02:05:39,175 INFO L134 LiptonReduction]: Checked pairs total: 36735 [2023-08-04 02:05:39,176 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-04 02:05:39,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:05:39,192 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;@1ded143, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:05:39,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:05:39,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:05:39,196 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:05:39,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:05:39,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:39,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:05:39,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:39,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash 611348083, now seen corresponding path program 1 times [2023-08-04 02:05:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:39,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370696023] [2023-08-04 02:05:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:05:39,286 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:05:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:05:39,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:05:39,325 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:05:39,326 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:05:39,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:05:39,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:05:39,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:05:39,327 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:05:39,330 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:05:39,330 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:05:39,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:05:39,370 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:05:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:40,430 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 02:05:40,430 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 02:05:40,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44625 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 02:05:40,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:40,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:40,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:05:40,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:40,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:05:41,405 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 02:05:41,405 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 02:05:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44625 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 02:05:41,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 115620 [2023-08-04 02:05:52,595 INFO L134 LiptonReduction]: Checked pairs total: 131374 [2023-08-04 02:05:52,596 INFO L136 LiptonReduction]: Total number of compositions: 510 [2023-08-04 02:05:52,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:05:52,606 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;@1ded143, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:05:52,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:05:52,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:05:52,618 INFO L124 PetriNetUnfolderBase]: 6/98 cut-off events. [2023-08-04 02:05:52,618 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:05:52,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:05:52,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:52,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash 599828617, now seen corresponding path program 1 times [2023-08-04 02:05:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737163771] [2023-08-04 02:05:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:52,801 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 02:05:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737163771] [2023-08-04 02:05:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737163771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:52,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774016167] [2023-08-04 02:05:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:52,809 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 02:05:52,838 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 02:05:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:52,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:05:52,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:52,959 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 02:05:52,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774016167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:52,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:05:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015253541] [2023-08-04 02:05:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:52,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:05:53,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:05:53,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 390.6) internal successors, (1953), 5 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states 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 02:05:53,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:53,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:05:53,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:55,967 INFO L124 PetriNetUnfolderBase]: 20172/30607 cut-off events. [2023-08-04 02:05:55,968 INFO L125 PetriNetUnfolderBase]: For 6657/6657 co-relation queries the response was YES. [2023-08-04 02:05:56,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64019 conditions, 30607 events. 20172/30607 cut-off events. For 6657/6657 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 195127 event pairs, 10808 based on Foata normal form. 0/28017 useless extension candidates. Maximal degree in co-relation 25445. Up to 28390 conditions per place. [2023-08-04 02:05:56,035 INFO L140 encePairwiseOnDemand]: 955/960 looper letters, 23 selfloop transitions, 5 changer transitions 31/64 dead transitions. [2023-08-04 02:05:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 326 flow [2023-08-04 02:05:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:05:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:05:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2003 transitions. [2023-08-04 02:05:56,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41729166666666667 [2023-08-04 02:05:56,052 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2003 transitions. [2023-08-04 02:05:56,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2003 transitions. [2023-08-04 02:05:56,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:56,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2003 transitions. [2023-08-04 02:05:56,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 400.6) internal successors, (2003), 5 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states 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 02:05:56,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:56,075 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:56,078 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 5 states and 2003 transitions. [2023-08-04 02:05:56,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 326 flow [2023-08-04 02:05:56,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:56,096 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 105 flow [2023-08-04 02:05:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2023-08-04 02:05:56,100 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-04 02:05:56,101 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 105 flow [2023-08-04 02:05:56,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 390.6) internal successors, (1953), 5 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states 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 02:05:56,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:56,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:05:56,112 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 02:05:56,306 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 02:05:56,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:56,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -377790832, now seen corresponding path program 1 times [2023-08-04 02:05:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:56,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092873317] [2023-08-04 02:05:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:56,357 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 02:05:56,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:56,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092873317] [2023-08-04 02:05:56,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092873317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:56,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:05:56,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:05:56,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027923679] [2023-08-04 02:05:56,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:56,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:05:56,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:05:56,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 02:05:56,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:56,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:05:56,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:56,675 INFO L124 PetriNetUnfolderBase]: 1984/3137 cut-off events. [2023-08-04 02:05:56,675 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-08-04 02:05:56,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 3137 events. 1984/3137 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15225 event pairs, 1498 based on Foata normal form. 1/3089 useless extension candidates. Maximal degree in co-relation 2832. Up to 2957 conditions per place. [2023-08-04 02:05:56,685 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:05:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 02:05:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1195 transitions. [2023-08-04 02:05:56,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149305555555556 [2023-08-04 02:05:56,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1195 transitions. [2023-08-04 02:05:56,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1195 transitions. [2023-08-04 02:05:56,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:56,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1195 transitions. [2023-08-04 02:05:56,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 398.3333333333333) internal successors, (1195), 3 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states 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 02:05:56,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:05:56,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:05:56,695 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 105 flow. Second operand 3 states and 1195 transitions. [2023-08-04 02:05:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 02:05:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:56,696 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 02:05:56,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 02:05:56,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-04 02:05:56,697 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 02:05:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 02:05:56,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:56,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:05:56,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:56,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1133684458, now seen corresponding path program 1 times [2023-08-04 02:05:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75143222] [2023-08-04 02:05:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:56,879 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 02:05:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75143222] [2023-08-04 02:05:56,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75143222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562589942] [2023-08-04 02:05:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:56,894 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 02:05:56,926 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 02:05:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:57,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:57,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:57,015 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 02:05:57,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:57,048 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 02:05:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562589942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:57,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:05:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406126757] [2023-08-04 02:05:57,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:57,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:05:57,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states 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 02:05:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:05:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:57,441 INFO L124 PetriNetUnfolderBase]: 1432/2207 cut-off events. [2023-08-04 02:05:57,441 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:05:57,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4631 conditions, 2207 events. 1432/2207 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9510 event pairs, 784 based on Foata normal form. 2/2176 useless extension candidates. Maximal degree in co-relation 2626. Up to 2073 conditions per place. [2023-08-04 02:05:57,448 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 02:05:57,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 02:05:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1583 transitions. [2023-08-04 02:05:57,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122395833333333 [2023-08-04 02:05:57,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1583 transitions. [2023-08-04 02:05:57,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1583 transitions. [2023-08-04 02:05:57,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:57,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1583 transitions. [2023-08-04 02:05:57,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 395.75) internal successors, (1583), 4 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states 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 02:05:57,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:05:57,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:05:57,461 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1583 transitions. [2023-08-04 02:05:57,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 02:05:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:57,462 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 02:05:57,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 02:05:57,463 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 02:05:57,463 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 02:05:57,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states 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 02:05:57,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:57,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:57,475 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 02:05:57,669 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 02:05:57,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:57,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1527802427, now seen corresponding path program 1 times [2023-08-04 02:05:57,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:57,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102586378] [2023-08-04 02:05:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:57,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:05:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102586378] [2023-08-04 02:05:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102586378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485408400] [2023-08-04 02:05:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:57,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:57,744 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 02:05:57,765 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 02:05:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:57,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:05:57,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:05:57,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485408400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:57,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:05:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129232770] [2023-08-04 02:05:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:05:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:05:57,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states 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 02:05:57,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:57,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:05:57,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:58,127 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 02:05:58,127 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 02:05:58,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9741 event pairs, 344 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 02:05:58,134 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 02:05:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 02:05:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:05:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:05:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1980 transitions. [2023-08-04 02:05:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2023-08-04 02:05:58,139 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1980 transitions. [2023-08-04 02:05:58,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1980 transitions. [2023-08-04 02:05:58,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:58,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1980 transitions. [2023-08-04 02:05:58,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 02:05:58,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:58,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:58,149 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1980 transitions. [2023-08-04 02:05:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 02:05:58,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:05:58,150 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 02:05:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 02:05:58,151 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 02:05:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 02:05:58,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states 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 02:05:58,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:58,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:05:58,353 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 02:05:58,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:58,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1011920359, now seen corresponding path program 1 times [2023-08-04 02:05:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893406470] [2023-08-04 02:05:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:05:58,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:58,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893406470] [2023-08-04 02:05:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893406470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:58,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:05:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:05:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21811661] [2023-08-04 02:05:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:58,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:05:58,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:05:58,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:05:58,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:05:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 393.6666666666667) internal successors, (1181), 3 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states 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 02:05:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:58,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:05:58,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:58,693 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 02:05:58,693 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:05:58,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8203 event pairs, 992 based on Foata normal form. 4/1970 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 02:05:58,698 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 02:05:58,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 02:05:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:05:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:05:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1197 transitions. [2023-08-04 02:05:58,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2023-08-04 02:05:58,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1197 transitions. [2023-08-04 02:05:58,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1197 transitions. [2023-08-04 02:05:58,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:58,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1197 transitions. [2023-08-04 02:05:58,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 02:05:58,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:05:58,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:05:58,707 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 1197 transitions. [2023-08-04 02:05:58,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 02:05:58,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:05:58,708 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 02:05:58,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 02:05:58,708 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 02:05:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 02:05:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 393.6666666666667) internal successors, (1181), 3 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states 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 02:05:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:05:58,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:58,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -428174443, now seen corresponding path program 1 times [2023-08-04 02:05:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:58,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285682792] [2023-08-04 02:05:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:58,769 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 02:05:58,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285682792] [2023-08-04 02:05:58,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285682792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223768860] [2023-08-04 02:05:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:58,771 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 02:05:58,773 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 02:05:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:58,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:05:58,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:58,862 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 02:05:58,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:05:58,891 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 02:05:58,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223768860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:05:58,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:05:58,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:05:58,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345654828] [2023-08-04 02:05:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:05:58,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:05:58,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:05:58,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 02:05:58,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:58,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:05:58,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:59,051 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 02:05:59,051 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 02:05:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5344 event pairs, 536 based on Foata normal form. 8/1438 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 02:05:59,055 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 02:05:59,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 02:05:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:05:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:05:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1587 transitions. [2023-08-04 02:05:59,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41328125 [2023-08-04 02:05:59,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1587 transitions. [2023-08-04 02:05:59,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1587 transitions. [2023-08-04 02:05:59,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:59,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1587 transitions. [2023-08-04 02:05:59,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 396.75) internal successors, (1587), 4 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 02:05:59,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:05:59,066 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:05:59,066 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1587 transitions. [2023-08-04 02:05:59,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 02:05:59,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:05:59,067 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 02:05:59,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:05:59,067 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-04 02:05:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 02:05:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 02:05:59,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:05:59,068 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:59,076 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 02:05:59,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:59,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:05:59,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:05:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash -627328030, now seen corresponding path program 1 times [2023-08-04 02:05:59,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:05:59,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922501740] [2023-08-04 02:05:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:05:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:05:59,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:05:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922501740] [2023-08-04 02:05:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922501740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:05:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034875589] [2023-08-04 02:05:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:05:59,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:59,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:05:59,316 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 02:05:59,344 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 02:05:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:05:59,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:05:59,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:05:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:05:59,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:05:59,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034875589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:05:59,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:05:59,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:05:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081594012] [2023-08-04 02:05:59,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:05:59,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:05:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:05:59,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:05:59,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:05:59,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:05:59,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 02:05:59,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:05:59,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:05:59,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:05:59,565 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 02:05:59,565 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 02:05:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3986 event pairs, 104 based on Foata normal form. 64/1206 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 02:05:59,567 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 02:05:59,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 02:05:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:05:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:05:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1984 transitions. [2023-08-04 02:05:59,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-08-04 02:05:59,577 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1984 transitions. [2023-08-04 02:05:59,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1984 transitions. [2023-08-04 02:05:59,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:05:59,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1984 transitions. [2023-08-04 02:05:59,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states 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 02:05:59,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:59,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 960.0) internal successors, (5760), 6 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states 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 02:05:59,585 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1984 transitions. [2023-08-04 02:05:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 02:05:59,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:05:59,586 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 02:05:59,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 02:05:59,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 02:05:59,587 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 02:05:59,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 02:05:59,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:05:59,587 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:05:59,588 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:05:59,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:05:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:05:59,792 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:05:59,792 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:05:59,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:00,633 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 02:06:00,633 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 02:06:00,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44625 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 02:06:00,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:00,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:00,716 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:00,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:00,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 02:06:01,415 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 02:06:01,416 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 02:06:01,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44625 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 02:06:01,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 115620 [2023-08-04 02:06:11,152 INFO L134 LiptonReduction]: Checked pairs total: 134185 [2023-08-04 02:06:11,152 INFO L136 LiptonReduction]: Total number of compositions: 510 [2023-08-04 02:06:11,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:06:11,154 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;@1ded143, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:11,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:06:11,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:11,155 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:06:11,155 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:06:11,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:11,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:11,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:11,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:11,156 INFO L85 PathProgramCache]: Analyzing trace with hash 969276732, now seen corresponding path program 1 times [2023-08-04 02:06:11,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:11,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776128600] [2023-08-04 02:06:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:11,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:11,187 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 02:06:11,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776128600] [2023-08-04 02:06:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776128600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:11,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:11,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226561582] [2023-08-04 02:06:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:11,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:11,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 392.3333333333333) internal successors, (1177), 3 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 02:06:11,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:11,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:13,389 INFO L124 PetriNetUnfolderBase]: 19931/29967 cut-off events. [2023-08-04 02:06:13,390 INFO L125 PetriNetUnfolderBase]: For 7134/7134 co-relation queries the response was YES. [2023-08-04 02:06:13,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62898 conditions, 29967 events. 19931/29967 cut-off events. For 7134/7134 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 188145 event pairs, 13302 based on Foata normal form. 0/27401 useless extension candidates. Maximal degree in co-relation 25307. Up to 28006 conditions per place. [2023-08-04 02:06:13,477 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 50 selfloop transitions, 2 changer transitions 3/61 dead transitions. [2023-08-04 02:06:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 316 flow [2023-08-04 02:06:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1224 transitions. [2023-08-04 02:06:13,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-04 02:06:13,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1224 transitions. [2023-08-04 02:06:13,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1224 transitions. [2023-08-04 02:06:13,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:13,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1224 transitions. [2023-08-04 02:06:13,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.0) internal successors, (1224), 3 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 02:06:13,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:13,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:13,486 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 3 states and 1224 transitions. [2023-08-04 02:06:13,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 316 flow [2023-08-04 02:06:13,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:06:13,492 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 200 flow [2023-08-04 02:06:13,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-04 02:06:13,492 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 02:06:13,492 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 200 flow [2023-08-04 02:06:13,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 392.3333333333333) internal successors, (1177), 3 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states 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 02:06:13,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:13,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:13,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:06:13,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:13,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1938514403, now seen corresponding path program 1 times [2023-08-04 02:06:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247919294] [2023-08-04 02:06:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:13,517 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 02:06:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247919294] [2023-08-04 02:06:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247919294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057261547] [2023-08-04 02:06:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:13,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:13,519 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 02:06:13,521 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 02:06:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:13,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:06:13,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:13,594 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 02:06:13,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:06:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057261547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:13,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:06:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:06:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593702266] [2023-08-04 02:06:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:13,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 393.3333333333333) internal successors, (1180), 3 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 02:06:13,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:13,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:13,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:16,205 INFO L124 PetriNetUnfolderBase]: 19717/29517 cut-off events. [2023-08-04 02:06:16,205 INFO L125 PetriNetUnfolderBase]: For 6665/6665 co-relation queries the response was YES. [2023-08-04 02:06:16,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61935 conditions, 29517 events. 19717/29517 cut-off events. For 6665/6665 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 184855 event pairs, 13229 based on Foata normal form. 0/27029 useless extension candidates. Maximal degree in co-relation 61905. Up to 27632 conditions per place. [2023-08-04 02:06:16,298 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 02:06:16,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 320 flow [2023-08-04 02:06:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1225 transitions. [2023-08-04 02:06:16,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2023-08-04 02:06:16,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1225 transitions. [2023-08-04 02:06:16,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1225 transitions. [2023-08-04 02:06:16,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:16,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1225 transitions. [2023-08-04 02:06:16,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 02:06:16,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:16,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:16,306 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 200 flow. Second operand 3 states and 1225 transitions. [2023-08-04 02:06:16,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 320 flow [2023-08-04 02:06:16,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:06:16,322 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 198 flow [2023-08-04 02:06:16,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2023-08-04 02:06:16,322 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-04 02:06:16,322 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 198 flow [2023-08-04 02:06:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 393.3333333333333) internal successors, (1180), 3 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states 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 02:06:16,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:16,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:16,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:06:16,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:16,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:16,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1928073655, now seen corresponding path program 1 times [2023-08-04 02:06:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:16,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868823310] [2023-08-04 02:06:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:16,561 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 02:06:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868823310] [2023-08-04 02:06:16,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868823310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:16,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731724484] [2023-08-04 02:06:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:16,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:16,563 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 02:06:16,565 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 02:06:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:16,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:06:16,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:16,638 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 02:06:16,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:06:16,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731724484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:16,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:06:16,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:06:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677032813] [2023-08-04 02:06:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:16,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:16,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 02:06:16,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:16,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:16,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:18,702 INFO L124 PetriNetUnfolderBase]: 19681/29763 cut-off events. [2023-08-04 02:06:18,702 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2023-08-04 02:06:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 29763 events. 19681/29763 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 190305 event pairs, 13174 based on Foata normal form. 0/27359 useless extension candidates. Maximal degree in co-relation 27274. Up to 27256 conditions per place. [2023-08-04 02:06:18,968 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 02:06:18,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 328 flow [2023-08-04 02:06:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1227 transitions. [2023-08-04 02:06:18,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42604166666666665 [2023-08-04 02:06:18,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1227 transitions. [2023-08-04 02:06:18,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1227 transitions. [2023-08-04 02:06:18,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:18,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1227 transitions. [2023-08-04 02:06:18,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 02:06:18,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:18,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:18,976 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 198 flow. Second operand 3 states and 1227 transitions. [2023-08-04 02:06:18,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 328 flow [2023-08-04 02:06:18,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:18,980 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 208 flow [2023-08-04 02:06:18,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-04 02:06:18,980 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-04 02:06:18,981 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 208 flow [2023-08-04 02:06:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 02:06:18,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:18,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:18,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 02:06:19,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:19,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:19,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1891232092, now seen corresponding path program 1 times [2023-08-04 02:06:19,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:19,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418666751] [2023-08-04 02:06:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:19,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:19,212 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 02:06:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418666751] [2023-08-04 02:06:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418666751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739669794] [2023-08-04 02:06:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:19,214 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 02:06:19,217 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 02:06:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:19,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:06:19,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:19,298 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 02:06:19,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:06:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739669794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:19,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:06:19,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:06:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933319744] [2023-08-04 02:06:19,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:19,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:19,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:19,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:19,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 02:06:19,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:19,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:19,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:21,773 INFO L124 PetriNetUnfolderBase]: 18785/28651 cut-off events. [2023-08-04 02:06:21,773 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 02:06:21,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60517 conditions, 28651 events. 18785/28651 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 183907 event pairs, 13063 based on Foata normal form. 0/26655 useless extension candidates. Maximal degree in co-relation 28822. Up to 23580 conditions per place. [2023-08-04 02:06:21,886 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 02:06:21,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 383 flow [2023-08-04 02:06:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 02:06:21,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284722222222222 [2023-08-04 02:06:21,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 02:06:21,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 02:06:21,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:21,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 02:06:21,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states 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 02:06:21,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:21,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:21,893 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 208 flow. Second operand 3 states and 1234 transitions. [2023-08-04 02:06:21,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 383 flow [2023-08-04 02:06:21,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:21,897 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 218 flow [2023-08-04 02:06:21,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-04 02:06:21,897 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 02:06:21,897 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 218 flow [2023-08-04 02:06:21,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 02:06:21,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:21,898 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] [2023-08-04 02:06:21,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 02:06:22,102 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,SelfDestructingSolverStorable11 [2023-08-04 02:06:22,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:22,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 766035551, now seen corresponding path program 1 times [2023-08-04 02:06:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:22,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819161292] [2023-08-04 02:06:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:22,144 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 02:06:22,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:22,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819161292] [2023-08-04 02:06:22,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819161292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:22,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225430653] [2023-08-04 02:06:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:22,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:22,147 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 02:06:22,172 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 02:06:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:22,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:06:22,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:06:22,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:06:22,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225430653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:22,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:06:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:06:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515708336] [2023-08-04 02:06:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:22,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:22,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:22,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:22,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 396.6666666666667) internal successors, (1190), 3 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 02:06:22,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:22,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:22,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:24,316 INFO L124 PetriNetUnfolderBase]: 18576/28798 cut-off events. [2023-08-04 02:06:24,316 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 02:06:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63359 conditions, 28798 events. 18576/28798 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 186653 event pairs, 12252 based on Foata normal form. 0/27851 useless extension candidates. Maximal degree in co-relation 32424. Up to 20868 conditions per place. [2023-08-04 02:06:24,438 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 02:06:24,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 395 flow [2023-08-04 02:06:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 02:06:24,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284722222222222 [2023-08-04 02:06:24,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 02:06:24,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 02:06:24,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:24,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 02:06:24,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states 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 02:06:24,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:24,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:24,445 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 218 flow. Second operand 3 states and 1234 transitions. [2023-08-04 02:06:24,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 395 flow [2023-08-04 02:06:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:24,460 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 228 flow [2023-08-04 02:06:24,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 02:06:24,460 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 02:06:24,460 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 228 flow [2023-08-04 02:06:24,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 396.6666666666667) internal successors, (1190), 3 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 02:06:24,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:24,460 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, 1, 1, 1, 1] [2023-08-04 02:06:24,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:06:24,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:06:24,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:24,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:24,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1384880843, now seen corresponding path program 1 times [2023-08-04 02:06:24,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:24,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141498171] [2023-08-04 02:06:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:06:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:24,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141498171] [2023-08-04 02:06:24,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141498171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:24,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422553307] [2023-08-04 02:06:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:24,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:24,705 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 02:06:24,729 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 02:06:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:24,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:06:24,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:06:24,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:06:24,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422553307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:24,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:06:24,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:06:24,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028280342] [2023-08-04 02:06:24,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:24,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:24,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 960 [2023-08-04 02:06:24,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 02:06:24,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 960 [2023-08-04 02:06:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:27,000 INFO L124 PetriNetUnfolderBase]: 18847/29441 cut-off events. [2023-08-04 02:06:27,001 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 02:06:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66720 conditions, 29441 events. 18847/29441 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 191026 event pairs, 14123 based on Foata normal form. 0/29207 useless extension candidates. Maximal degree in co-relation 35088. Up to 23742 conditions per place. [2023-08-04 02:06:27,150 INFO L140 encePairwiseOnDemand]: 957/960 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:06:27,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 407 flow [2023-08-04 02:06:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 02:06:27,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284722222222222 [2023-08-04 02:06:27,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 02:06:27,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 02:06:27,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:27,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 02:06:27,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states 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 02:06:27,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:27,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 960.0) internal successors, (3840), 4 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states 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 02:06:27,161 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 228 flow. Second operand 3 states and 1234 transitions. [2023-08-04 02:06:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 407 flow [2023-08-04 02:06:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:27,296 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 238 flow [2023-08-04 02:06:27,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-04 02:06:27,297 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 02:06:27,297 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 238 flow [2023-08-04 02:06:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states 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 02:06:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:27,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:27,305 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 02:06:27,502 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,SelfDestructingSolverStorable13 [2023-08-04 02:06:27,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:27,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1626318837, now seen corresponding path program 1 times [2023-08-04 02:06:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818592562] [2023-08-04 02:06:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:06:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:27,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818592562] [2023-08-04 02:06:27,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818592562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:27,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791914863] [2023-08-04 02:06:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:27,550 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 02:06:27,552 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 02:06:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:27,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:27,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:06:27,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:06:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791914863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:27,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:27,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:06:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790550144] [2023-08-04 02:06:27,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:27,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 395.4) internal successors, (1977), 5 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 02:06:27,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:27,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:29,817 INFO L124 PetriNetUnfolderBase]: 17691/27603 cut-off events. [2023-08-04 02:06:29,817 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 02:06:29,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63363 conditions, 27603 events. 17691/27603 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 179983 event pairs, 10191 based on Foata normal form. 2/27604 useless extension candidates. Maximal degree in co-relation 48888. Up to 25640 conditions per place. [2023-08-04 02:06:29,912 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 02:06:29,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 368 flow [2023-08-04 02:06:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1612 transitions. [2023-08-04 02:06:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197916666666667 [2023-08-04 02:06:29,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1612 transitions. [2023-08-04 02:06:29,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1612 transitions. [2023-08-04 02:06:29,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1612 transitions. [2023-08-04 02:06:29,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states 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 02:06:29,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:29,920 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:29,920 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 238 flow. Second operand 4 states and 1612 transitions. [2023-08-04 02:06:29,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 368 flow [2023-08-04 02:06:30,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:30,142 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 250 flow [2023-08-04 02:06:30,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-04 02:06:30,142 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 02:06:30,142 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 250 flow [2023-08-04 02:06:30,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.4) internal successors, (1977), 5 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 02:06:30,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:30,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:30,148 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 02:06:30,345 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 02:06:30,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:30,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2012666453, now seen corresponding path program 1 times [2023-08-04 02:06:30,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:30,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849734597] [2023-08-04 02:06:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:06:30,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:30,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849734597] [2023-08-04 02:06:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849734597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:30,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613754320] [2023-08-04 02:06:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:30,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:30,400 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 02:06:30,403 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 02:06:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:30,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:30,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:06:30,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:06:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613754320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:30,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:30,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:06:30,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099222766] [2023-08-04 02:06:30,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:30,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states 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 02:06:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:30,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:30,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:32,638 INFO L124 PetriNetUnfolderBase]: 16839/26275 cut-off events. [2023-08-04 02:06:32,638 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 02:06:32,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60198 conditions, 26275 events. 16839/26275 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 171213 event pairs, 9864 based on Foata normal form. 8/26282 useless extension candidates. Maximal degree in co-relation 45955. Up to 24296 conditions per place. [2023-08-04 02:06:32,727 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 02:06:32,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 396 flow [2023-08-04 02:06:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1616 transitions. [2023-08-04 02:06:32,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2023-08-04 02:06:32,730 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1616 transitions. [2023-08-04 02:06:32,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1616 transitions. [2023-08-04 02:06:32,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:32,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1616 transitions. [2023-08-04 02:06:32,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 02:06:32,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:32,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:32,735 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 250 flow. Second operand 4 states and 1616 transitions. [2023-08-04 02:06:32,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 396 flow [2023-08-04 02:06:32,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 386 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:06:32,888 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 254 flow [2023-08-04 02:06:32,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-04 02:06:32,888 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 02:06:32,888 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 254 flow [2023-08-04 02:06:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states 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 02:06:32,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:32,889 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, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:32,893 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 02:06:33,091 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 02:06:33,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:33,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:33,091 INFO L85 PathProgramCache]: Analyzing trace with hash 858038928, now seen corresponding path program 1 times [2023-08-04 02:06:33,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:33,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722644352] [2023-08-04 02:06:33,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:33,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:06:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:33,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722644352] [2023-08-04 02:06:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722644352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:33,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428019333] [2023-08-04 02:06:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:33,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:33,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:33,136 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 02:06:33,138 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 02:06:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:33,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:33,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:06:33,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:06:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428019333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:33,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:06:33,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819798462] [2023-08-04 02:06:33,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:33,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:33,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:33,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 395.8) internal successors, (1979), 5 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states 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 02:06:33,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:33,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:33,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:35,313 INFO L124 PetriNetUnfolderBase]: 16407/25603 cut-off events. [2023-08-04 02:06:35,314 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 02:06:35,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58010 conditions, 25603 events. 16407/25603 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 165234 event pairs, 9523 based on Foata normal form. 32/25634 useless extension candidates. Maximal degree in co-relation 43949. Up to 22968 conditions per place. [2023-08-04 02:06:35,404 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 64 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 02:06:35,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 416 flow [2023-08-04 02:06:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1620 transitions. [2023-08-04 02:06:35,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2023-08-04 02:06:35,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1620 transitions. [2023-08-04 02:06:35,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1620 transitions. [2023-08-04 02:06:35,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:35,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1620 transitions. [2023-08-04 02:06:35,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 02:06:35,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:35,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:35,411 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 254 flow. Second operand 4 states and 1620 transitions. [2023-08-04 02:06:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 416 flow [2023-08-04 02:06:35,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 406 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:06:35,590 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 258 flow [2023-08-04 02:06:35,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-04 02:06:35,591 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 02:06:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 258 flow [2023-08-04 02:06:35,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.8) internal successors, (1979), 5 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states 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 02:06:35,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:35,591 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, 1, 1, 1] [2023-08-04 02:06:35,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 02:06:35,796 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 02:06:35,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:35,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1720748602, now seen corresponding path program 1 times [2023-08-04 02:06:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855425806] [2023-08-04 02:06:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:06:35,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:35,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855425806] [2023-08-04 02:06:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855425806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:35,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808064615] [2023-08-04 02:06:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:35,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:35,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:35,867 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 02:06:35,868 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 02:06:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:35,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:35,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:06:35,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:06:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808064615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:35,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:06:35,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683680386] [2023-08-04 02:06:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:35,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:35,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 02:06:36,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:37,478 INFO L124 PetriNetUnfolderBase]: 10315/16383 cut-off events. [2023-08-04 02:06:37,479 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 02:06:37,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 16383 events. 10315/16383 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 98938 event pairs, 5374 based on Foata normal form. 192/16574 useless extension candidates. Maximal degree in co-relation 32048. Up to 9425 conditions per place. [2023-08-04 02:06:37,537 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 71 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 02:06:37,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 461 flow [2023-08-04 02:06:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 02:06:37,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236979166666667 [2023-08-04 02:06:37,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 02:06:37,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 02:06:37,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:37,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 02:06:37,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 02:06:37,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:37,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:37,545 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 258 flow. Second operand 4 states and 1627 transitions. [2023-08-04 02:06:37,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 461 flow [2023-08-04 02:06:37,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:06:37,629 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 268 flow [2023-08-04 02:06:37,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-04 02:06:37,629 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-04 02:06:37,629 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 268 flow [2023-08-04 02:06:37,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 02:06:37,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:37,630 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 02:06:37,635 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 02:06:37,830 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 02:06:37,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:37,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 360107686, now seen corresponding path program 1 times [2023-08-04 02:06:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649759118] [2023-08-04 02:06:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649759118] [2023-08-04 02:06:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649759118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741432394] [2023-08-04 02:06:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:37,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:37,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:37,924 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 02:06:37,926 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 02:06:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:38,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:38,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:38,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741432394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:38,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:38,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:06:38,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657951798] [2023-08-04 02:06:38,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:38,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:38,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 396.4) internal successors, (1982), 5 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states 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 02:06:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:39,303 INFO L124 PetriNetUnfolderBase]: 9415/14912 cut-off events. [2023-08-04 02:06:39,303 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 02:06:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35765 conditions, 14912 events. 9415/14912 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87992 event pairs, 5942 based on Foata normal form. 233/15144 useless extension candidates. Maximal degree in co-relation 34698. Up to 8732 conditions per place. [2023-08-04 02:06:39,360 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 02:06:39,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 472 flow [2023-08-04 02:06:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 02:06:39,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236979166666667 [2023-08-04 02:06:39,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 02:06:39,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 02:06:39,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:39,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 02:06:39,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 02:06:39,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:39,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:39,368 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 268 flow. Second operand 4 states and 1627 transitions. [2023-08-04 02:06:39,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 472 flow [2023-08-04 02:06:39,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 468 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:39,446 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 284 flow [2023-08-04 02:06:39,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-08-04 02:06:39,446 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-08-04 02:06:39,446 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 284 flow [2023-08-04 02:06:39,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.4) internal successors, (1982), 5 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states 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 02:06:39,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:39,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-04 02:06:39,453 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 02:06:39,652 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 02:06:39,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:39,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2024115156, now seen corresponding path program 1 times [2023-08-04 02:06:39,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:39,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058307456] [2023-08-04 02:06:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:39,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:06:39,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058307456] [2023-08-04 02:06:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058307456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317047083] [2023-08-04 02:06:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:39,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:39,726 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 02:06:39,729 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 02:06:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:39,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:06:39,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:06:39,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:06:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317047083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:39,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:06:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594498596] [2023-08-04 02:06:39,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:06:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:06:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:06:39,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 960 [2023-08-04 02:06:39,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states 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 02:06:39,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:39,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 960 [2023-08-04 02:06:39,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:41,145 INFO L124 PetriNetUnfolderBase]: 9409/14895 cut-off events. [2023-08-04 02:06:41,145 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 02:06:41,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37434 conditions, 14895 events. 9409/14895 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87850 event pairs, 8414 based on Foata normal form. 13/14907 useless extension candidates. Maximal degree in co-relation 36338. Up to 13453 conditions per place. [2023-08-04 02:06:41,191 INFO L140 encePairwiseOnDemand]: 956/960 looper letters, 71 selfloop transitions, 3 changer transitions 3/83 dead transitions. [2023-08-04 02:06:41,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 490 flow [2023-08-04 02:06:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 02:06:41,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236979166666667 [2023-08-04 02:06:41,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 02:06:41,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 02:06:41,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:41,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 02:06:41,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 02:06:41,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:41,198 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 960.0) internal successors, (4800), 5 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 02:06:41,198 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 284 flow. Second operand 4 states and 1627 transitions. [2023-08-04 02:06:41,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 490 flow [2023-08-04 02:06:41,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:41,357 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 282 flow [2023-08-04 02:06:41,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-04 02:06:41,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-08-04 02:06:41,357 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 282 flow [2023-08-04 02:06:41,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states 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 02:06:41,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:41,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:06:41,362 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 02:06:41,558 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 02:06:41,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:41,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1760316902, now seen corresponding path program 1 times [2023-08-04 02:06:41,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:41,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055283510] [2023-08-04 02:06:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:06:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055283510] [2023-08-04 02:06:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055283510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033121375] [2023-08-04 02:06:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:42,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:42,188 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 02:06:42,216 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 02:06:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:42,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 02:06:42,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:06:44,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:06:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033121375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:45,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:45,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 02:06:45,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754265080] [2023-08-04 02:06:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:45,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 02:06:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 02:06:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-04 02:06:45,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:06:45,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 375.3) internal successors, (3753), 10 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states 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 02:06:45,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:45,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:06:45,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:48,121 INFO L124 PetriNetUnfolderBase]: 14536/22751 cut-off events. [2023-08-04 02:06:48,122 INFO L125 PetriNetUnfolderBase]: For 15199/15199 co-relation queries the response was YES. [2023-08-04 02:06:48,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56258 conditions, 22751 events. 14536/22751 cut-off events. For 15199/15199 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 148603 event pairs, 2264 based on Foata normal form. 1/22628 useless extension candidates. Maximal degree in co-relation 55843. Up to 9029 conditions per place. [2023-08-04 02:06:48,230 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 216 selfloop transitions, 29 changer transitions 1/252 dead transitions. [2023-08-04 02:06:48,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 252 transitions, 1676 flow [2023-08-04 02:06:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:06:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:06:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3523 transitions. [2023-08-04 02:06:48,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077546296296296 [2023-08-04 02:06:48,234 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3523 transitions. [2023-08-04 02:06:48,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3523 transitions. [2023-08-04 02:06:48,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:48,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3523 transitions. [2023-08-04 02:06:48,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 391.44444444444446) internal successors, (3523), 9 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states 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 02:06:48,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 960.0) internal successors, (9600), 10 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 02:06:48,243 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 960.0) internal successors, (9600), 10 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 02:06:48,244 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 282 flow. Second operand 9 states and 3523 transitions. [2023-08-04 02:06:48,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 252 transitions, 1676 flow [2023-08-04 02:06:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 252 transitions, 1630 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 02:06:48,563 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 447 flow [2023-08-04 02:06:48,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=447, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2023-08-04 02:06:48,564 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-04 02:06:48,564 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 447 flow [2023-08-04 02:06:48,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 375.3) internal successors, (3753), 10 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states 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 02:06:48,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:48,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:06:48,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 02:06:48,764 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 02:06:48,765 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:48,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1198836496, now seen corresponding path program 1 times [2023-08-04 02:06:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214763735] [2023-08-04 02:06:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:48,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:49,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:49,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214763735] [2023-08-04 02:06:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214763735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:49,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565489283] [2023-08-04 02:06:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:49,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:49,387 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 02:06:49,389 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 02:06:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:49,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 02:06:49,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:51,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:06:52,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565489283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:52,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:52,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 02:06:52,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393566735] [2023-08-04 02:06:52,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:52,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 02:06:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 02:06:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-04 02:06:52,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:06:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 447 flow. Second operand has 11 states, 11 states have (on average 376.54545454545456) internal successors, (4142), 11 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states 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 02:06:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:06:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:56,480 INFO L124 PetriNetUnfolderBase]: 21992/35015 cut-off events. [2023-08-04 02:06:56,480 INFO L125 PetriNetUnfolderBase]: For 59344/59344 co-relation queries the response was YES. [2023-08-04 02:06:56,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117728 conditions, 35015 events. 21992/35015 cut-off events. For 59344/59344 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 249850 event pairs, 2632 based on Foata normal form. 1/34868 useless extension candidates. Maximal degree in co-relation 116948. Up to 14922 conditions per place. [2023-08-04 02:06:56,684 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 200 selfloop transitions, 35 changer transitions 1/242 dead transitions. [2023-08-04 02:06:56,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 242 transitions, 1696 flow [2023-08-04 02:06:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:06:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:06:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3135 transitions. [2023-08-04 02:06:56,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408203125 [2023-08-04 02:06:56,689 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3135 transitions. [2023-08-04 02:06:56,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3135 transitions. [2023-08-04 02:06:56,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:56,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3135 transitions. [2023-08-04 02:06:56,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 391.875) internal successors, (3135), 8 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 02:06:56,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 960.0) internal successors, (8640), 9 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 02:06:56,696 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 960.0) internal successors, (8640), 9 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 02:06:56,696 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 447 flow. Second operand 8 states and 3135 transitions. [2023-08-04 02:06:56,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 242 transitions, 1696 flow [2023-08-04 02:06:57,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 242 transitions, 1695 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:57,637 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 630 flow [2023-08-04 02:06:57,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=630, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2023-08-04 02:06:57,638 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2023-08-04 02:06:57,638 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 630 flow [2023-08-04 02:06:57,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 376.54545454545456) internal successors, (4142), 11 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states 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 02:06:57,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:57,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:06:57,643 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 02:06:57,841 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 02:06:57,841 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:06:57,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1613257452, now seen corresponding path program 1 times [2023-08-04 02:06:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:57,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515998544] [2023-08-04 02:06:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:06:58,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:58,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515998544] [2023-08-04 02:06:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515998544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:58,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72401480] [2023-08-04 02:06:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:58,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:58,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:58,387 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 02:06:58,390 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 02:06:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:58,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 02:06:58,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:07:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:07:00,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:07:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:07:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72401480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:07:01,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:07:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 02:07:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811228498] [2023-08-04 02:07:01,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:07:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 02:07:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 02:07:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 02:07:01,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:07:01,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 630 flow. Second operand has 11 states, 11 states have (on average 375.1818181818182) internal successors, (4127), 11 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states 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 02:07:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:07:01,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:05,659 INFO L124 PetriNetUnfolderBase]: 21992/35114 cut-off events. [2023-08-04 02:07:05,659 INFO L125 PetriNetUnfolderBase]: For 128903/128903 co-relation queries the response was YES. [2023-08-04 02:07:05,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143276 conditions, 35114 events. 21992/35114 cut-off events. For 128903/128903 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 251976 event pairs, 2963 based on Foata normal form. 1/35008 useless extension candidates. Maximal degree in co-relation 143127. Up to 18000 conditions per place. [2023-08-04 02:07:06,101 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 225 selfloop transitions, 37 changer transitions 4/272 dead transitions. [2023-08-04 02:07:06,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 272 transitions, 2104 flow [2023-08-04 02:07:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:07:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:07:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3523 transitions. [2023-08-04 02:07:06,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077546296296296 [2023-08-04 02:07:06,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3523 transitions. [2023-08-04 02:07:06,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3523 transitions. [2023-08-04 02:07:06,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:06,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3523 transitions. [2023-08-04 02:07:06,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 391.44444444444446) internal successors, (3523), 9 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states 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 02:07:06,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 960.0) internal successors, (9600), 10 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 02:07:06,113 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 960.0) internal successors, (9600), 10 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states 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 02:07:06,113 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 630 flow. Second operand 9 states and 3523 transitions. [2023-08-04 02:07:06,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 272 transitions, 2104 flow [2023-08-04 02:07:07,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 272 transitions, 2058 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-04 02:07:07,383 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 738 flow [2023-08-04 02:07:07,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2023-08-04 02:07:07,383 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2023-08-04 02:07:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 738 flow [2023-08-04 02:07:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 375.1818181818182) internal successors, (4127), 11 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states 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 02:07:07,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:07,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:07:07,391 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 02:07:07,584 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 02:07:07,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:07:07,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -602232988, now seen corresponding path program 1 times [2023-08-04 02:07:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199405237] [2023-08-04 02:07:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:07:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199405237] [2023-08-04 02:07:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199405237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:07:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346983773] [2023-08-04 02:07:07,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:07:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:07:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:07:08,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:07:08,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 738 flow. Second operand has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 02:07:08,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:08,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:07:08,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:12,106 INFO L124 PetriNetUnfolderBase]: 21992/35076 cut-off events. [2023-08-04 02:07:12,107 INFO L125 PetriNetUnfolderBase]: For 153304/153304 co-relation queries the response was YES. [2023-08-04 02:07:12,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151312 conditions, 35076 events. 21992/35076 cut-off events. For 153304/153304 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 250597 event pairs, 2846 based on Foata normal form. 1/34976 useless extension candidates. Maximal degree in co-relation 150424. Up to 17734 conditions per place. [2023-08-04 02:07:12,247 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 191 selfloop transitions, 39 changer transitions 11/247 dead transitions. [2023-08-04 02:07:12,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 247 transitions, 1974 flow [2023-08-04 02:07:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:07:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:07:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2375 transitions. [2023-08-04 02:07:12,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123263888888889 [2023-08-04 02:07:12,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2375 transitions. [2023-08-04 02:07:12,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2375 transitions. [2023-08-04 02:07:12,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:12,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2375 transitions. [2023-08-04 02:07:12,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 395.8333333333333) internal successors, (2375), 6 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states 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 02:07:12,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 960.0) internal successors, (6720), 7 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states 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 02:07:12,258 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 960.0) internal successors, (6720), 7 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states 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 02:07:12,258 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 738 flow. Second operand 6 states and 2375 transitions. [2023-08-04 02:07:12,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 247 transitions, 1974 flow [2023-08-04 02:07:13,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 247 transitions, 1880 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-04 02:07:13,657 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 889 flow [2023-08-04 02:07:13,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=889, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2023-08-04 02:07:13,657 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-08-04 02:07:13,658 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 889 flow [2023-08-04 02:07:13,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 02:07:13,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:13,658 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:07:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 02:07:13,658 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:07:13,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1534971544, now seen corresponding path program 1 times [2023-08-04 02:07:13,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266417792] [2023-08-04 02:07:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:13,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:07:14,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266417792] [2023-08-04 02:07:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266417792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:07:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396639206] [2023-08-04 02:07:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:07:14,076 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 02:07:14,078 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 02:07:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:14,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 02:07:14,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:07:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:07:16,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:07:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:07:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396639206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:07:16,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:07:16,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 02:07:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837413460] [2023-08-04 02:07:16,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:07:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 02:07:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 02:07:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-04 02:07:16,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:07:16,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 889 flow. Second operand has 11 states, 11 states have (on average 375.45454545454544) internal successors, (4130), 11 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 02:07:16,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:16,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:07:16,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:22,081 INFO L124 PetriNetUnfolderBase]: 25078/40226 cut-off events. [2023-08-04 02:07:22,082 INFO L125 PetriNetUnfolderBase]: For 197712/197712 co-relation queries the response was YES. [2023-08-04 02:07:22,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176807 conditions, 40226 events. 25078/40226 cut-off events. For 197712/197712 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 299112 event pairs, 2331 based on Foata normal form. 1/40028 useless extension candidates. Maximal degree in co-relation 175732. Up to 18997 conditions per place. [2023-08-04 02:07:22,260 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 182 selfloop transitions, 47 changer transitions 32/267 dead transitions. [2023-08-04 02:07:22,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 267 transitions, 2190 flow [2023-08-04 02:07:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:07:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:07:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3134 transitions. [2023-08-04 02:07:22,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080729166666667 [2023-08-04 02:07:22,263 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3134 transitions. [2023-08-04 02:07:22,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3134 transitions. [2023-08-04 02:07:22,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:22,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3134 transitions. [2023-08-04 02:07:22,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 391.75) internal successors, (3134), 8 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 02:07:22,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 960.0) internal successors, (8640), 9 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 02:07:22,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 960.0) internal successors, (8640), 9 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states 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 02:07:22,269 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 889 flow. Second operand 8 states and 3134 transitions. [2023-08-04 02:07:22,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 267 transitions, 2190 flow [2023-08-04 02:07:25,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 267 transitions, 2186 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 02:07:25,430 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 971 flow [2023-08-04 02:07:25,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=971, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2023-08-04 02:07:25,430 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-08-04 02:07:25,430 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 971 flow [2023-08-04 02:07:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 375.45454545454544) internal successors, (4130), 11 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 02:07:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:25,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-08-04 02:07:25,435 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 02:07:25,631 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,SelfDestructingSolverStorable24 [2023-08-04 02:07:25,632 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:07:25,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1208494660, now seen corresponding path program 2 times [2023-08-04 02:07:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:25,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645546535] [2023-08-04 02:07:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:25,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-04 02:07:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645546535] [2023-08-04 02:07:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645546535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:26,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:26,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:07:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126491796] [2023-08-04 02:07:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:07:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:07:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:07:26,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 960 [2023-08-04 02:07:26,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 971 flow. Second operand has 5 states, 5 states have (on average 374.4) internal successors, (1872), 5 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 02:07:26,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:26,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 960 [2023-08-04 02:07:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:30,884 INFO L124 PetriNetUnfolderBase]: 23096/38440 cut-off events. [2023-08-04 02:07:30,884 INFO L125 PetriNetUnfolderBase]: For 241277/241277 co-relation queries the response was YES. [2023-08-04 02:07:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173781 conditions, 38440 events. 23096/38440 cut-off events. For 241277/241277 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 297166 event pairs, 3092 based on Foata normal form. 1/38309 useless extension candidates. Maximal degree in co-relation 173597. Up to 16684 conditions per place. [2023-08-04 02:07:31,051 INFO L140 encePairwiseOnDemand]: 952/960 looper letters, 0 selfloop transitions, 0 changer transitions 234/234 dead transitions. [2023-08-04 02:07:31,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 234 transitions, 1993 flow [2023-08-04 02:07:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:07:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:07:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2369 transitions. [2023-08-04 02:07:31,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41128472222222223 [2023-08-04 02:07:31,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2369 transitions. [2023-08-04 02:07:31,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2369 transitions. [2023-08-04 02:07:31,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:31,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2369 transitions. [2023-08-04 02:07:31,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 394.8333333333333) internal successors, (2369), 6 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states 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 02:07:31,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 960.0) internal successors, (6720), 7 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states 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 02:07:31,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 960.0) internal successors, (6720), 7 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states 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 02:07:31,059 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 971 flow. Second operand 6 states and 2369 transitions. [2023-08-04 02:07:31,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 234 transitions, 1993 flow [2023-08-04 02:07:33,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 234 transitions, 1888 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-04 02:07:33,667 INFO L231 Difference]: Finished difference. Result has 104 places, 0 transitions, 0 flow [2023-08-04 02:07:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=960, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=104, PETRI_TRANSITIONS=0} [2023-08-04 02:07:33,668 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2023-08-04 02:07:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 0 transitions, 0 flow [2023-08-04 02:07:33,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 374.4) internal successors, (1872), 5 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 02:07:33,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:07:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 02:07:33,668 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:33,668 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:07:33,669 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:07:33,669 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:07:33,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:07:33 BasicIcfg [2023-08-04 02:07:33,672 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:07:33,672 INFO L158 Benchmark]: Toolchain (without parser) took 122925.48ms. Allocated memory was 369.1MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 305.3MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-04 02:07:33,672 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 369.1MB. Free memory was 316.5MB in the beginning and 316.4MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:07:33,672 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.64ms. Allocated memory is still 369.1MB. Free memory was 305.3MB in the beginning and 293.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 02:07:33,672 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.75ms. Allocated memory is still 369.1MB. Free memory was 293.3MB in the beginning and 290.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:07:33,672 INFO L158 Benchmark]: Boogie Preprocessor took 31.50ms. Allocated memory is still 369.1MB. Free memory was 290.6MB in the beginning and 288.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:07:33,673 INFO L158 Benchmark]: RCFGBuilder took 523.58ms. Allocated memory was 369.1MB in the beginning and 591.4MB in the end (delta: 222.3MB). Free memory was 288.8MB in the beginning and 541.7MB in the end (delta: -252.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.0GB. [2023-08-04 02:07:33,673 INFO L158 Benchmark]: TraceAbstraction took 122142.85ms. Allocated memory was 591.4MB in the beginning and 7.4GB in the end (delta: 6.8GB). Free memory was 540.4MB in the beginning and 5.2GB in the end (delta: -4.7GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-04 02:07:33,674 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 369.1MB. Free memory was 316.5MB in the beginning and 316.4MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 189.64ms. Allocated memory is still 369.1MB. Free memory was 305.3MB in the beginning and 293.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.75ms. Allocated memory is still 369.1MB. Free memory was 293.3MB in the beginning and 290.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.50ms. Allocated memory is still 369.1MB. Free memory was 290.6MB in the beginning and 288.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 523.58ms. Allocated memory was 369.1MB in the beginning and 591.4MB in the end (delta: 222.3MB). Free memory was 288.8MB in the beginning and 541.7MB in the end (delta: -252.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.0GB. * TraceAbstraction took 122142.85ms. Allocated memory was 591.4MB in the beginning and 7.4GB in the end (delta: 6.8GB). Free memory was 540.4MB in the beginning and 5.2GB in the end (delta: -4.7GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.2s, 276 PlacesBefore, 39 PlacesAfterwards, 297 TransitionsBefore, 41 TransitionsAfterwards, 34968 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 176 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 63 ConcurrentYvCompositions, 19 ChoiceCompositions, 318 TotalNumberOfCompositions, 36735 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 36256, independent: 36220, independent conditional: 0, independent unconditional: 36220, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 20344, independent: 20329, independent conditional: 0, independent unconditional: 20329, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 36256, independent: 15891, independent conditional: 0, independent unconditional: 15891, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 20344, unknown conditional: 0, unknown unconditional: 20344] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 77, Positive conditional cache size: 0, Positive unconditional cache size: 77, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.1s, 414 PlacesBefore, 54 PlacesAfterwards, 450 TransitionsBefore, 59 TransitionsAfterwards, 115620 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 295 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 124 ConcurrentYvCompositions, 31 ChoiceCompositions, 510 TotalNumberOfCompositions, 131374 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 127542, independent: 127489, independent conditional: 0, independent unconditional: 127489, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 69220, independent: 69198, independent conditional: 0, independent unconditional: 69198, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 127542, independent: 58291, independent conditional: 0, independent unconditional: 58291, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 69220, unknown conditional: 0, unknown unconditional: 69220] , Statistics on independence cache: Total cache size (in pairs): 190, Positive cache size: 184, Positive conditional cache size: 0, Positive unconditional cache size: 184, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.4s, 414 PlacesBefore, 54 PlacesAfterwards, 450 TransitionsBefore, 59 TransitionsAfterwards, 115620 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 295 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 124 ConcurrentYvCompositions, 31 ChoiceCompositions, 510 TotalNumberOfCompositions, 134185 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 130207, independent: 130141, independent conditional: 0, independent unconditional: 130141, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 69512, independent: 69488, independent conditional: 0, independent unconditional: 69488, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 130207, independent: 60653, independent conditional: 0, independent unconditional: 60653, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 69512, unknown conditional: 0, unknown unconditional: 69512] , Statistics on independence cache: Total cache size (in pairs): 213, Positive cache size: 207, Positive conditional cache size: 0, Positive unconditional cache size: 207, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 88]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.7s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.5s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred 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 10 procedures, 534 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.4s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 323 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 254 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 534 IncrementalHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 22 mSDtfsCounter, 534 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 758 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 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 10 procedures, 534 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 93.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 62.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 11.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2715 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2344 mSDsluCounter, 743 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 684 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6336 IncrementalHoareTripleChecker+Invalid, 6479 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 59 mSDtfsCounter, 6336 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1203 GetRequests, 1079 SyntacticMatches, 22 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=971occurred in iteration=17, InterpolantAutomatonStates: 88, 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 1347 NumberOfCodeBlocks, 1347 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1815 ConstructedInterpolants, 0 QuantifiedInterpolants, 21010 SizeOfPredicates, 150 NumberOfNonLiveVariables, 4197 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 43 InterpolantComputations, 8 PerfectInterpolantSequences, 736/816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:07:33,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...