/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-name-comparator-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:06:34,267 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:06:34,333 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:06:34,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:06:34,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:06:34,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:06:34,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:06:34,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:06:34,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:06:34,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:06:34,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:06:34,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:06:34,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:06:34,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:06:34,382 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:06:34,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:06:34,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:06:34,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:06:34,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:06:34,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:06:34,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:06:34,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:06:34,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:06:34,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:06:34,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:06:34,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:06:34,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:06:34,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:06:34,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:06:34,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:06:34,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:34,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:06:34,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:06:34,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:06:34,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:06:34,388 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:06:34,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:06:34,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:06:34,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:06:34,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:06:34,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:06:34,631 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:06:34,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 02:06:35,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:06:36,015 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:06:36,016 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 02:06:36,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4801f60c/244c89cd50884b498948ee3c0d643ae5/FLAGe7800f4d4 [2023-08-04 02:06:36,038 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4801f60c/244c89cd50884b498948ee3c0d643ae5 [2023-08-04 02:06:36,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:06:36,042 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:06:36,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:36,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:06:36,046 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:06:36,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53eaa5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36, skipping insertion in model container [2023-08-04 02:06:36,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,083 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:06:36,221 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-name-comparator-symm.wvr_bound2.c[4021,4034] [2023-08-04 02:06:36,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:36,234 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:06:36,259 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-name-comparator-symm.wvr_bound2.c[4021,4034] [2023-08-04 02:06:36,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:36,275 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:06:36,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36 WrapperNode [2023-08-04 02:06:36,276 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:36,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:36,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:06:36,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:06:36,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,318 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 259 [2023-08-04 02:06:36,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:36,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:06:36,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:06:36,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:06:36,328 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,339 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:06:36,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:06:36,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:06:36,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:06:36,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (1/1) ... [2023-08-04 02:06:36,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:36,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:36,386 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 02:06:36,395 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 02:06:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:06:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:06:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:06:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:06:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:06:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:06:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:06:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:06:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:06:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:06:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:06:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:06:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:06:36,420 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 02:06:36,515 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:06:36,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:06:36,836 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:06:36,846 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:06:36,846 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 02:06:36,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:36 BoogieIcfgContainer [2023-08-04 02:06:36,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:06:36,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:06:36,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:06:36,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:06:36,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:06:36" (1/3) ... [2023-08-04 02:06:36,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116375af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:36, skipping insertion in model container [2023-08-04 02:06:36,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:36" (2/3) ... [2023-08-04 02:06:36,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116375af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:36, skipping insertion in model container [2023-08-04 02:06:36,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:36" (3/3) ... [2023-08-04 02:06:36,857 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-name-comparator-symm.wvr_bound2.c [2023-08-04 02:06:36,865 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:06:36,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:06:36,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:06:36,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:06:36,995 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:06:37,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,156 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 02:06:37,156 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:06:37,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 02:06:37,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:37,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 290 transitions, 602 flow [2023-08-04 02:06:37,299 INFO L124 PetriNetUnfolderBase]: 51/483 cut-off events. [2023-08-04 02:06:37,299 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:06:37,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 483 events. 51/483 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1991 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 255. Up to 8 conditions per place. [2023-08-04 02:06:37,318 INFO L119 LiptonReduction]: Number of co-enabled transitions 21798 [2023-08-04 02:06:45,458 INFO L134 LiptonReduction]: Checked pairs total: 24682 [2023-08-04 02:06:45,458 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-04 02:06:45,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:06:45,476 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;@6619d458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:45,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:06:45,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:45,483 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-08-04 02:06:45,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:06:45,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:45,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:06:45,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:06:45,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash 390905949, now seen corresponding path program 1 times [2023-08-04 02:06:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806435368] [2023-08-04 02:06:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:45,839 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 02:06:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806435368] [2023-08-04 02:06:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806435368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:45,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:45,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244226827] [2023-08-04 02:06:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:45,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 604 [2023-08-04 02:06:45,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:45,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:45,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 604 [2023-08-04 02:06:45,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:46,097 INFO L124 PetriNetUnfolderBase]: 507/864 cut-off events. [2023-08-04 02:06:46,097 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 02:06:46,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 864 events. 507/864 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3669 event pairs, 380 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 1456. Up to 830 conditions per place. [2023-08-04 02:06:46,101 INFO L140 encePairwiseOnDemand]: 598/604 looper letters, 19 selfloop transitions, 2 changer transitions 13/36 dead transitions. [2023-08-04 02:06:46,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 158 flow [2023-08-04 02:06:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2023-08-04 02:06:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519867549668874 [2023-08-04 02:06:46,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2023-08-04 02:06:46,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2023-08-04 02:06:46,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:46,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2023-08-04 02:06:46,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 604.0) internal successors, (2416), 4 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,145 INFO L175 Difference]: Start difference. First operand has 34 places, 38 transitions, 98 flow. Second operand 3 states and 819 transitions. [2023-08-04 02:06:46,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 158 flow [2023-08-04 02:06:46,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:06:46,151 INFO L231 Difference]: Finished difference. Result has 36 places, 23 transitions, 66 flow [2023-08-04 02:06:46,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2023-08-04 02:06:46,157 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-04 02:06:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 66 flow [2023-08-04 02:06:46,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:46,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:06:46,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:06:46,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1563931410, now seen corresponding path program 1 times [2023-08-04 02:06:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:46,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687748722] [2023-08-04 02:06:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:46,304 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 02:06:46,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687748722] [2023-08-04 02:06:46,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687748722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774866213] [2023-08-04 02:06:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:46,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:46,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:46,308 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 02:06:46,329 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 02:06:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:46,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:06:46,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:46,437 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 02:06:46,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:46,456 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 02:06:46,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774866213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:46,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:46,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:06:46,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703516627] [2023-08-04 02:06:46,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:46,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:06:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:06:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:06:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 604 [2023-08-04 02:06:46,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 260.5) internal successors, (2084), 8 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:46,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 604 [2023-08-04 02:06:46,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:46,611 INFO L124 PetriNetUnfolderBase]: 163/298 cut-off events. [2023-08-04 02:06:46,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 02:06:46,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 298 events. 163/298 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1031 event pairs, 124 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 610. Up to 284 conditions per place. [2023-08-04 02:06:46,613 INFO L140 encePairwiseOnDemand]: 601/604 looper letters, 19 selfloop transitions, 4 changer transitions 0/25 dead transitions. [2023-08-04 02:06:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 120 flow [2023-08-04 02:06:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:06:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:06:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1320 transitions. [2023-08-04 02:06:46,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-08-04 02:06:46,617 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1320 transitions. [2023-08-04 02:06:46,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1320 transitions. [2023-08-04 02:06:46,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:46,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1320 transitions. [2023-08-04 02:06:46,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 604.0) internal successors, (3624), 6 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,627 INFO L175 Difference]: Start difference. First operand has 36 places, 23 transitions, 66 flow. Second operand 5 states and 1320 transitions. [2023-08-04 02:06:46,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 120 flow [2023-08-04 02:06:46,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:46,628 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 88 flow [2023-08-04 02:06:46,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=604, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-04 02:06:46,629 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-04 02:06:46,630 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 88 flow [2023-08-04 02:06:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 260.5) internal successors, (2084), 8 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:46,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:46,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-04 02:06:46,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:06:46,837 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 02:06:46,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:06:46,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 562626254, now seen corresponding path program 2 times [2023-08-04 02:06:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741509060] [2023-08-04 02:06:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:46,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:06:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:46,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:06:46,895 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:06:46,896 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:06:46,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:06:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:06:46,898 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-04 02:06:46,899 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:06:46,900 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:06:46,900 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:06:46,937 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:06:46,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,175 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 02:06:47,175 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:06:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 02:06:47,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:47,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:06:47,459 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 02:06:47,460 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:06:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 02:06:47,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 77868 [2023-08-04 02:06:54,633 INFO L134 LiptonReduction]: Checked pairs total: 203839 [2023-08-04 02:06:54,633 INFO L136 LiptonReduction]: Total number of compositions: 405 [2023-08-04 02:06:54,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:06:54,636 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;@6619d458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:54,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:06:54,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:54,644 INFO L124 PetriNetUnfolderBase]: 7/93 cut-off events. [2023-08-04 02:06:54,644 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-08-04 02:06:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:06:54,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:06:54,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash 22262076, now seen corresponding path program 1 times [2023-08-04 02:06:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:54,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780587721] [2023-08-04 02:06:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:54,689 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 02:06:54,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780587721] [2023-08-04 02:06:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780587721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:54,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:54,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:54,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432719566] [2023-08-04 02:06:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:54,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:54,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:54,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 827 [2023-08-04 02:06:54,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 827 [2023-08-04 02:06:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:30,494 INFO L124 PetriNetUnfolderBase]: 332806/469082 cut-off events. [2023-08-04 02:07:30,495 INFO L125 PetriNetUnfolderBase]: For 17188/17188 co-relation queries the response was YES. [2023-08-04 02:07:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885110 conditions, 469082 events. 332806/469082 cut-off events. For 17188/17188 co-relation queries the response was YES. Maximal size of possible extension queue 20448. Compared 4156238 event pairs, 223499 based on Foata normal form. 13831/348331 useless extension candidates. Maximal degree in co-relation 379266. Up to 405645 conditions per place. [2023-08-04 02:07:32,828 INFO L140 encePairwiseOnDemand]: 819/827 looper letters, 46 selfloop transitions, 2 changer transitions 17/112 dead transitions. [2023-08-04 02:07:32,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 398 flow [2023-08-04 02:07:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:07:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:07:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1197 transitions. [2023-08-04 02:07:32,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48246674727932287 [2023-08-04 02:07:32,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1197 transitions. [2023-08-04 02:07:32,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1197 transitions. [2023-08-04 02:07:32,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:32,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1197 transitions. [2023-08-04 02:07:32,840 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 02:07:32,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 827.0) internal successors, (3308), 4 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:32,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 827.0) internal successors, (3308), 4 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:32,846 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 280 flow. Second operand 3 states and 1197 transitions. [2023-08-04 02:07:32,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 398 flow [2023-08-04 02:07:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:07:32,889 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 224 flow [2023-08-04 02:07:32,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-08-04 02:07:32,891 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 02:07:32,892 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 224 flow [2023-08-04 02:07:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:32,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:32,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:32,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:07:32,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:32,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:32,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1834176920, now seen corresponding path program 1 times [2023-08-04 02:07:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:32,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698131827] [2023-08-04 02:07:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:32,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:32,989 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 02:07:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:32,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698131827] [2023-08-04 02:07:32,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698131827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:07:32,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020772498] [2023-08-04 02:07:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:07:32,992 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 02:07:32,995 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 02:07:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:33,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:07:33,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:07:33,106 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 02:07:33,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:07:33,128 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 02:07:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020772498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:07:33,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:07:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:07:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212343008] [2023-08-04 02:07:33,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:07:33,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:07:33,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:07:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:07:33,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 827 [2023-08-04 02:07:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 376.625) internal successors, (3013), 8 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 827 [2023-08-04 02:07:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:42,605 INFO L124 PetriNetUnfolderBase]: 99038/143036 cut-off events. [2023-08-04 02:07:42,605 INFO L125 PetriNetUnfolderBase]: For 2570/2570 co-relation queries the response was YES. [2023-08-04 02:07:43,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267095 conditions, 143036 events. 99038/143036 cut-off events. For 2570/2570 co-relation queries the response was YES. Maximal size of possible extension queue 6798. Compared 1184193 event pairs, 66241 based on Foata normal form. 0/107942 useless extension candidates. Maximal degree in co-relation 267080. Up to 121027 conditions per place. [2023-08-04 02:07:43,826 INFO L140 encePairwiseOnDemand]: 824/827 looper letters, 46 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-08-04 02:07:43,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 332 flow [2023-08-04 02:07:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:07:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:07:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1927 transitions. [2023-08-04 02:07:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660217654171705 [2023-08-04 02:07:43,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1927 transitions. [2023-08-04 02:07:43,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1927 transitions. [2023-08-04 02:07:43,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:43,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1927 transitions. [2023-08-04 02:07:43,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 385.4) internal successors, (1927), 5 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:43,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:43,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:43,849 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 224 flow. Second operand 5 states and 1927 transitions. [2023-08-04 02:07:43,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 332 flow [2023-08-04 02:07:43,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 324 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 02:07:43,854 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 242 flow [2023-08-04 02:07:43,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2023-08-04 02:07:43,855 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -2 predicate places. [2023-08-04 02:07:43,855 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 242 flow [2023-08-04 02:07:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 376.625) internal successors, (3013), 8 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:43,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:43,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:07:43,866 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 02:07:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:44,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:44,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -337594856, now seen corresponding path program 2 times [2023-08-04 02:07:44,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337677530] [2023-08-04 02:07:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:44,156 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 02:07:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337677530] [2023-08-04 02:07:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337677530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:07:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23596077] [2023-08-04 02:07:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:07:44,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:07:44,158 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 02:07:44,164 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 02:07:44,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:07:44,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:07:44,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:07:44,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:07:44,285 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 02:07:44,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:07:44,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23596077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:44,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:07:44,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:07:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34715982] [2023-08-04 02:07:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:44,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:07:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:07:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:07:44,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 827 [2023-08-04 02:07:44,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:44,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:44,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 827 [2023-08-04 02:07:44,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:53,421 INFO L124 PetriNetUnfolderBase]: 96718/139897 cut-off events. [2023-08-04 02:07:53,422 INFO L125 PetriNetUnfolderBase]: For 1700/1700 co-relation queries the response was YES. [2023-08-04 02:07:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261855 conditions, 139897 events. 96718/139897 cut-off events. For 1700/1700 co-relation queries the response was YES. Maximal size of possible extension queue 6792. Compared 1168177 event pairs, 30766 based on Foata normal form. 0/107589 useless extension candidates. Maximal degree in co-relation 261824. Up to 118030 conditions per place. [2023-08-04 02:07:54,674 INFO L140 encePairwiseOnDemand]: 823/827 looper letters, 75 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2023-08-04 02:07:54,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 458 flow [2023-08-04 02:07:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:07:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:07:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1958 transitions. [2023-08-04 02:07:54,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735187424425635 [2023-08-04 02:07:54,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1958 transitions. [2023-08-04 02:07:54,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1958 transitions. [2023-08-04 02:07:54,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:54,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1958 transitions. [2023-08-04 02:07:54,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 02:07:54,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:54,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:54,692 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 242 flow. Second operand 5 states and 1958 transitions. [2023-08-04 02:07:54,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 458 flow [2023-08-04 02:07:54,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 447 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:54,695 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 250 flow [2023-08-04 02:07:54,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2023-08-04 02:07:54,696 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-08-04 02:07:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 250 flow [2023-08-04 02:07:54,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:54,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:54,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:54,705 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 02:07:54,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:07:54,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:54,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1034807399, now seen corresponding path program 1 times [2023-08-04 02:07:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:54,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148108087] [2023-08-04 02:07:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:54,939 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 02:07:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:54,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148108087] [2023-08-04 02:07:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148108087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:54,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358047743] [2023-08-04 02:07:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 827 [2023-08-04 02:07:54,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:54,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:54,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 827 [2023-08-04 02:07:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:04,470 INFO L124 PetriNetUnfolderBase]: 97608/141217 cut-off events. [2023-08-04 02:08:04,471 INFO L125 PetriNetUnfolderBase]: For 2386/2386 co-relation queries the response was YES. [2023-08-04 02:08:05,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263621 conditions, 141217 events. 97608/141217 cut-off events. For 2386/2386 co-relation queries the response was YES. Maximal size of possible extension queue 6804. Compared 1174588 event pairs, 49146 based on Foata normal form. 1/107604 useless extension candidates. Maximal degree in co-relation 263594. Up to 119139 conditions per place. [2023-08-04 02:08:05,460 INFO L140 encePairwiseOnDemand]: 824/827 looper letters, 59 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 02:08:05,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 107 transitions, 387 flow [2023-08-04 02:08:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:08:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:08:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1189 transitions. [2023-08-04 02:08:05,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479242241031842 [2023-08-04 02:08:05,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1189 transitions. [2023-08-04 02:08:05,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1189 transitions. [2023-08-04 02:08:05,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:05,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1189 transitions. [2023-08-04 02:08:05,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 396.3333333333333) internal successors, (1189), 3 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:05,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 827.0) internal successors, (3308), 4 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:05,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 827.0) internal successors, (3308), 4 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:05,471 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 250 flow. Second operand 3 states and 1189 transitions. [2023-08-04 02:08:05,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 107 transitions, 387 flow [2023-08-04 02:08:05,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:08:05,473 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 248 flow [2023-08-04 02:08:05,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-08-04 02:08:05,474 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-08-04 02:08:05,474 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 248 flow [2023-08-04 02:08:05,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:05,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:05,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 02:08:05,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:05,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -951914734, now seen corresponding path program 1 times [2023-08-04 02:08:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:05,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420537997] [2023-08-04 02:08:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:05,518 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 02:08:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420537997] [2023-08-04 02:08:05,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420537997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:08:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194329264] [2023-08-04 02:08:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:08:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:08:05,522 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 02:08:05,529 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 02:08:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:05,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:08:05,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:08:05,635 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 02:08:05,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:08:05,649 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 02:08:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194329264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:08:05,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:08:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:08:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656412682] [2023-08-04 02:08:05,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:08:05,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:08:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:08:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:08:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 827 [2023-08-04 02:08:05,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 379.0) internal successors, (1895), 5 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:05,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:05,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 827 [2023-08-04 02:08:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:14,507 INFO L124 PetriNetUnfolderBase]: 89784/128637 cut-off events. [2023-08-04 02:08:14,507 INFO L125 PetriNetUnfolderBase]: For 1815/1815 co-relation queries the response was YES. [2023-08-04 02:08:15,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241315 conditions, 128637 events. 89784/128637 cut-off events. For 1815/1815 co-relation queries the response was YES. Maximal size of possible extension queue 6409. Compared 1044687 event pairs, 26713 based on Foata normal form. 8/98534 useless extension candidates. Maximal degree in co-relation 241288. Up to 108927 conditions per place. [2023-08-04 02:08:15,458 INFO L140 encePairwiseOnDemand]: 824/827 looper letters, 75 selfloop transitions, 3 changer transitions 0/124 dead transitions. [2023-08-04 02:08:15,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 455 flow [2023-08-04 02:08:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:08:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:08:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1580 transitions. [2023-08-04 02:08:15,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47762998790810157 [2023-08-04 02:08:15,462 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1580 transitions. [2023-08-04 02:08:15,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1580 transitions. [2023-08-04 02:08:15,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:15,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1580 transitions. [2023-08-04 02:08:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:15,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 827.0) internal successors, (4135), 5 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:15,471 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 827.0) internal successors, (4135), 5 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:15,471 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 248 flow. Second operand 4 states and 1580 transitions. [2023-08-04 02:08:15,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 455 flow [2023-08-04 02:08:15,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:08:15,475 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 245 flow [2023-08-04 02:08:15,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2023-08-04 02:08:15,475 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 02:08:15,476 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 245 flow [2023-08-04 02:08:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 379.0) internal successors, (1895), 5 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:15,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:15,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:15,486 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 02:08:15,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:08:15,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:15,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1837683798, now seen corresponding path program 1 times [2023-08-04 02:08:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699065192] [2023-08-04 02:08:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:15,752 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 02:08:15,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:15,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699065192] [2023-08-04 02:08:15,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699065192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:08:15,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289359235] [2023-08-04 02:08:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:15,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:08:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:08:15,754 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 02:08:15,757 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 02:08:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:15,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:08:15,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:08:15,880 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 02:08:15,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:08:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289359235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:15,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:08:15,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:08:15,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632906919] [2023-08-04 02:08:15,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:15,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:08:15,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:08:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:08:15,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 827 [2023-08-04 02:08:15,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 97 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 379.0) internal successors, (1895), 5 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:15,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:15,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 827 [2023-08-04 02:08:15,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:21,369 INFO L124 PetriNetUnfolderBase]: 60216/82975 cut-off events. [2023-08-04 02:08:21,370 INFO L125 PetriNetUnfolderBase]: For 2088/2088 co-relation queries the response was YES. [2023-08-04 02:08:21,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159442 conditions, 82975 events. 60216/82975 cut-off events. For 2088/2088 co-relation queries the response was YES. Maximal size of possible extension queue 4250. Compared 590518 event pairs, 5578 based on Foata normal form. 5760/68468 useless extension candidates. Maximal degree in co-relation 159415. Up to 35304 conditions per place. [2023-08-04 02:08:21,726 INFO L140 encePairwiseOnDemand]: 824/827 looper letters, 0 selfloop transitions, 0 changer transitions 178/178 dead transitions. [2023-08-04 02:08:21,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 178 transitions, 671 flow [2023-08-04 02:08:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:08:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:08:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2010 transitions. [2023-08-04 02:08:21,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860943168077388 [2023-08-04 02:08:21,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2010 transitions. [2023-08-04 02:08:21,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2010 transitions. [2023-08-04 02:08:21,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:21,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2010 transitions. [2023-08-04 02:08:21,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 402.0) internal successors, (2010), 5 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:21,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:21,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 827.0) internal successors, (4962), 6 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:21,741 INFO L175 Difference]: Start difference. First operand has 106 places, 97 transitions, 245 flow. Second operand 5 states and 2010 transitions. [2023-08-04 02:08:21,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 178 transitions, 671 flow [2023-08-04 02:08:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 178 transitions, 664 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:08:21,790 INFO L231 Difference]: Finished difference. Result has 105 places, 0 transitions, 0 flow [2023-08-04 02:08:21,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=827, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=105, PETRI_TRANSITIONS=0} [2023-08-04 02:08:21,791 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-08-04 02:08:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 0 transitions, 0 flow [2023-08-04 02:08:21,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 379.0) internal successors, (1895), 5 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:21,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:08:21,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:08:21,797 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 02:08:21,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:08:21,996 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-04 02:08:21,997 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:08:22,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,180 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 02:08:22,180 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:08:22,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 02:08:22,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,211 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:08:22,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 892 flow [2023-08-04 02:08:22,416 INFO L124 PetriNetUnfolderBase]: 177/1323 cut-off events. [2023-08-04 02:08:22,416 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:08:22,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1323 events. 177/1323 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8163 event pairs, 1 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-04 02:08:22,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 77868 [2023-08-04 02:08:29,590 INFO L134 LiptonReduction]: Checked pairs total: 208950 [2023-08-04 02:08:29,590 INFO L136 LiptonReduction]: Total number of compositions: 412 [2023-08-04 02:08:29,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:08:29,592 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;@6619d458, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:08:29,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:08:29,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:08:29,594 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 02:08:29,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:08:29,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:29,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:08:29,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:08:29,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1936214593, now seen corresponding path program 1 times [2023-08-04 02:08:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593685762] [2023-08-04 02:08:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:29,642 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 02:08:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593685762] [2023-08-04 02:08:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593685762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:29,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:08:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:08:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903929185] [2023-08-04 02:08:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:29,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:08:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:08:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:08:29,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 834 [2023-08-04 02:08:29,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 834 [2023-08-04 02:08:29,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:02,431 INFO L124 PetriNetUnfolderBase]: 332806/469082 cut-off events. [2023-08-04 02:09:02,431 INFO L125 PetriNetUnfolderBase]: For 17188/17188 co-relation queries the response was YES. [2023-08-04 02:09:03,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885110 conditions, 469082 events. 332806/469082 cut-off events. For 17188/17188 co-relation queries the response was YES. Maximal size of possible extension queue 20448. Compared 4156583 event pairs, 223499 based on Foata normal form. 13831/348331 useless extension candidates. Maximal degree in co-relation 379266. Up to 405645 conditions per place. [2023-08-04 02:09:05,485 INFO L140 encePairwiseOnDemand]: 823/834 looper letters, 61 selfloop transitions, 2 changer transitions 2/112 dead transitions. [2023-08-04 02:09:05,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 398 flow [2023-08-04 02:09:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:09:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:09:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1203 transitions. [2023-08-04 02:09:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48081534772182255 [2023-08-04 02:09:05,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1203 transitions. [2023-08-04 02:09:05,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1203 transitions. [2023-08-04 02:09:05,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:05,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1203 transitions. [2023-08-04 02:09:05,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:05,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:05,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:05,494 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 286 flow. Second operand 3 states and 1203 transitions. [2023-08-04 02:09:05,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 398 flow [2023-08-04 02:09:05,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:09:05,520 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 270 flow [2023-08-04 02:09:05,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-08-04 02:09:05,521 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 02:09:05,521 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 270 flow [2023-08-04 02:09:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:05,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:05,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 02:09:05,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:09:05,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 880262163, now seen corresponding path program 1 times [2023-08-04 02:09:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790332829] [2023-08-04 02:09:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:05,546 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 02:09:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790332829] [2023-08-04 02:09:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790332829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:09:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:09:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676108197] [2023-08-04 02:09:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:09:05,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 834 [2023-08-04 02:09:05,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 379.3333333333333) internal successors, (1138), 3 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:05,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:05,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 834 [2023-08-04 02:09:05,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:37,532 INFO L124 PetriNetUnfolderBase]: 331498/466578 cut-off events. [2023-08-04 02:09:37,533 INFO L125 PetriNetUnfolderBase]: For 16982/16982 co-relation queries the response was YES. [2023-08-04 02:09:39,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880498 conditions, 466578 events. 331498/466578 cut-off events. For 16982/16982 co-relation queries the response was YES. Maximal size of possible extension queue 20431. Compared 4118929 event pairs, 173554 based on Foata normal form. 0/337164 useless extension candidates. Maximal degree in co-relation 880483. Up to 403957 conditions per place. [2023-08-04 02:09:40,693 INFO L140 encePairwiseOnDemand]: 831/834 looper letters, 71 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 02:09:40,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 120 transitions, 436 flow [2023-08-04 02:09:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:09:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:09:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1204 transitions. [2023-08-04 02:09:40,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812150279776179 [2023-08-04 02:09:40,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1204 transitions. [2023-08-04 02:09:40,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1204 transitions. [2023-08-04 02:09:40,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:40,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1204 transitions. [2023-08-04 02:09:40,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.3333333333333) internal successors, (1204), 3 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:40,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:40,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:40,703 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 270 flow. Second operand 3 states and 1204 transitions. [2023-08-04 02:09:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 120 transitions, 436 flow [2023-08-04 02:09:40,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 120 transitions, 426 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:09:40,819 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 272 flow [2023-08-04 02:09:40,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2023-08-04 02:09:40,819 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-08-04 02:09:40,820 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 272 flow [2023-08-04 02:09:40,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 379.3333333333333) internal successors, (1138), 3 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:40,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:40,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:40,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 02:09:40,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:09:40,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1506873232, now seen corresponding path program 1 times [2023-08-04 02:09:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460616699] [2023-08-04 02:09:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:40,856 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 02:09:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460616699] [2023-08-04 02:09:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460616699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101524440] [2023-08-04 02:09:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:40,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:40,860 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 02:09:40,861 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 02:09:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:40,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:09:40,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:40,957 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 02:09:40,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:09:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101524440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:40,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:09:40,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:09:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860798252] [2023-08-04 02:09:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:09:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 834 [2023-08-04 02:09:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:40,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:40,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 834 [2023-08-04 02:09:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:10:13,456 INFO L124 PetriNetUnfolderBase]: 330430/451749 cut-off events. [2023-08-04 02:10:13,457 INFO L125 PetriNetUnfolderBase]: For 10749/10749 co-relation queries the response was YES. [2023-08-04 02:10:14,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863810 conditions, 451749 events. 330430/451749 cut-off events. For 10749/10749 co-relation queries the response was YES. Maximal size of possible extension queue 20040. Compared 3768586 event pairs, 135884 based on Foata normal form. 0/324225 useless extension candidates. Maximal degree in co-relation 863789. Up to 399144 conditions per place. [2023-08-04 02:10:16,447 INFO L140 encePairwiseOnDemand]: 831/834 looper letters, 91 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2023-08-04 02:10:16,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 516 flow [2023-08-04 02:10:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:10:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:10:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1223 transitions. [2023-08-04 02:10:16,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888089528377298 [2023-08-04 02:10:16,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1223 transitions. [2023-08-04 02:10:16,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1223 transitions. [2023-08-04 02:10:16,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:10:16,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1223 transitions. [2023-08-04 02:10:16,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.6666666666667) internal successors, (1223), 3 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:16,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:16,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:16,455 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 272 flow. Second operand 3 states and 1223 transitions. [2023-08-04 02:10:16,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 516 flow [2023-08-04 02:10:16,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 514 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:10:16,469 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 282 flow [2023-08-04 02:10:16,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2023-08-04 02:10:16,470 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-08-04 02:10:16,470 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 282 flow [2023-08-04 02:10:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:16,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:10:16,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:10:16,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:10:16,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:10:16,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:10:16,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:10:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash 56134999, now seen corresponding path program 1 times [2023-08-04 02:10:16,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:10:16,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854546375] [2023-08-04 02:10:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:16,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:10:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:16,715 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 02:10:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:10:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854546375] [2023-08-04 02:10:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854546375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:10:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673456772] [2023-08-04 02:10:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:16,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:10:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:10:16,717 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 02:10:16,719 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 02:10:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:16,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:10:16,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:10:16,830 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 02:10:16,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:10:16,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673456772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:10:16,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:10:16,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:10:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127712696] [2023-08-04 02:10:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:10:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:10:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:10:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:10:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:10:16,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 834 [2023-08-04 02:10:16,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:16,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:10:16,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 834 [2023-08-04 02:10:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:10:38,366 INFO L124 PetriNetUnfolderBase]: 240442/322356 cut-off events. [2023-08-04 02:10:38,367 INFO L125 PetriNetUnfolderBase]: For 18542/18542 co-relation queries the response was YES. [2023-08-04 02:10:39,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640575 conditions, 322356 events. 240442/322356 cut-off events. For 18542/18542 co-relation queries the response was YES. Maximal size of possible extension queue 13448. Compared 2534937 event pairs, 106666 based on Foata normal form. 0/237622 useless extension candidates. Maximal degree in co-relation 640553. Up to 198015 conditions per place. [2023-08-04 02:10:40,672 INFO L140 encePairwiseOnDemand]: 831/834 looper letters, 104 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2023-08-04 02:10:40,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 586 flow [2023-08-04 02:10:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:10:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:10:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1235 transitions. [2023-08-04 02:10:40,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936051159072742 [2023-08-04 02:10:40,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1235 transitions. [2023-08-04 02:10:40,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1235 transitions. [2023-08-04 02:10:40,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:10:40,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1235 transitions. [2023-08-04 02:10:40,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.6666666666667) internal successors, (1235), 3 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:40,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:40,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:40,679 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 282 flow. Second operand 3 states and 1235 transitions. [2023-08-04 02:10:40,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 586 flow [2023-08-04 02:10:40,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 153 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:10:40,695 INFO L231 Difference]: Finished difference. Result has 108 places, 113 transitions, 292 flow [2023-08-04 02:10:40,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=108, PETRI_TRANSITIONS=113} [2023-08-04 02:10:40,695 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 4 predicate places. [2023-08-04 02:10:40,695 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 113 transitions, 292 flow [2023-08-04 02:10:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:40,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:10:40,696 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] [2023-08-04 02:10:40,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:10:40,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:10:40,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:10:40,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:10:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash 538286992, now seen corresponding path program 1 times [2023-08-04 02:10:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:10:40,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017012088] [2023-08-04 02:10:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:10:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:40,984 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 02:10:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:10:40,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017012088] [2023-08-04 02:10:40,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017012088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:10:40,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762185467] [2023-08-04 02:10:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:40,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:10:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:10:40,986 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 02:10:40,989 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 02:10:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:41,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:10:41,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:10:41,102 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 02:10:41,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:10:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762185467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:10:41,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:10:41,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:10:41,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639346876] [2023-08-04 02:10:41,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:10:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:10:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:10:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:10:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:10:41,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 834 [2023-08-04 02:10:41,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 113 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:41,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:10:41,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 834 [2023-08-04 02:10:41,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:11:03,470 INFO L124 PetriNetUnfolderBase]: 232314/323117 cut-off events. [2023-08-04 02:11:03,470 INFO L125 PetriNetUnfolderBase]: For 56478/56478 co-relation queries the response was YES. [2023-08-04 02:11:04,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647783 conditions, 323117 events. 232314/323117 cut-off events. For 56478/56478 co-relation queries the response was YES. Maximal size of possible extension queue 13495. Compared 2710960 event pairs, 140827 based on Foata normal form. 0/248131 useless extension candidates. Maximal degree in co-relation 647760. Up to 254922 conditions per place. [2023-08-04 02:11:05,528 INFO L140 encePairwiseOnDemand]: 831/834 looper letters, 105 selfloop transitions, 2 changer transitions 0/154 dead transitions. [2023-08-04 02:11:05,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 598 flow [2023-08-04 02:11:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:11:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:11:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1235 transitions. [2023-08-04 02:11:05,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936051159072742 [2023-08-04 02:11:05,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1235 transitions. [2023-08-04 02:11:05,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1235 transitions. [2023-08-04 02:11:05,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:11:05,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1235 transitions. [2023-08-04 02:11:05,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.6666666666667) internal successors, (1235), 3 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:05,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:05,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 834.0) internal successors, (3336), 4 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:05,537 INFO L175 Difference]: Start difference. First operand has 108 places, 113 transitions, 292 flow. Second operand 3 states and 1235 transitions. [2023-08-04 02:11:05,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 598 flow [2023-08-04 02:11:07,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:11:07,142 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 302 flow [2023-08-04 02:11:07,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2023-08-04 02:11:07,143 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2023-08-04 02:11:07,143 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 302 flow [2023-08-04 02:11:07,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:07,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:11:07,144 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, 1, 1, 1] [2023-08-04 02:11:07,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:11:07,344 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,SelfDestructingSolverStorable13 [2023-08-04 02:11:07,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:11:07,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:11:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1294103256, now seen corresponding path program 1 times [2023-08-04 02:11:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:11:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519818864] [2023-08-04 02:11:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:11:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:11:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:11:07,408 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 02:11:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:11:07,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519818864] [2023-08-04 02:11:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519818864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:11:07,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101806687] [2023-08-04 02:11:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:11:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:11:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:11:07,411 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 02:11:07,413 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 02:11:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:11:07,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:11:07,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:11:07,552 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 02:11:07,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:11:07,567 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 02:11:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101806687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:11:07,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:11:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:11:07,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242312731] [2023-08-04 02:11:07,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:11:07,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:11:07,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:11:07,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:11:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:11:07,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 834 [2023-08-04 02:11:07,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 374.5) internal successors, (2996), 8 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:07,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:11:07,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 834 [2023-08-04 02:11:07,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:11:29,331 INFO L124 PetriNetUnfolderBase]: 218959/302286 cut-off events. [2023-08-04 02:11:29,331 INFO L125 PetriNetUnfolderBase]: For 35652/35652 co-relation queries the response was YES. [2023-08-04 02:11:30,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608862 conditions, 302286 events. 218959/302286 cut-off events. For 35652/35652 co-relation queries the response was YES. Maximal size of possible extension queue 12950. Compared 2493457 event pairs, 71059 based on Foata normal form. 10/232832 useless extension candidates. Maximal degree in co-relation 608832. Up to 268859 conditions per place. [2023-08-04 02:11:31,370 INFO L140 encePairwiseOnDemand]: 828/834 looper letters, 89 selfloop transitions, 7 changer transitions 1/144 dead transitions. [2023-08-04 02:11:31,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 144 transitions, 560 flow [2023-08-04 02:11:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:11:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:11:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2687 transitions. [2023-08-04 02:11:31,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46026036313806096 [2023-08-04 02:11:31,374 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2687 transitions. [2023-08-04 02:11:31,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2687 transitions. [2023-08-04 02:11:31,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:11:31,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2687 transitions. [2023-08-04 02:11:31,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 383.85714285714283) internal successors, (2687), 7 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:31,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 834.0) internal successors, (6672), 8 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:31,381 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 834.0) internal successors, (6672), 8 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:31,382 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 302 flow. Second operand 7 states and 2687 transitions. [2023-08-04 02:11:31,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 144 transitions, 560 flow [2023-08-04 02:11:35,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 144 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:11:35,596 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 334 flow [2023-08-04 02:11:35,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2023-08-04 02:11:35,596 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 13 predicate places. [2023-08-04 02:11:35,597 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 334 flow [2023-08-04 02:11:35,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 374.5) internal successors, (2996), 8 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:35,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:11:35,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2023-08-04 02:11:35,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:11:35,798 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,SelfDestructingSolverStorable14 [2023-08-04 02:11:35,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:11:35,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:11:35,799 INFO L85 PathProgramCache]: Analyzing trace with hash 603276098, now seen corresponding path program 1 times [2023-08-04 02:11:35,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:11:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060274210] [2023-08-04 02:11:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:11:35,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:11:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:11:35,885 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 02:11:35,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:11:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060274210] [2023-08-04 02:11:35,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060274210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:11:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961643460] [2023-08-04 02:11:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:11:35,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:11:35,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:11:35,888 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 02:11:35,890 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 02:11:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:11:36,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:11:36,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:11:36,039 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 02:11:36,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:11:36,052 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 02:11:36,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961643460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:11:36,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:11:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:11:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672427595] [2023-08-04 02:11:36,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:11:36,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:11:36,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:11:36,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:11:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:11:36,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 834 [2023-08-04 02:11:36,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:11:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 834 [2023-08-04 02:11:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:11:56,912 INFO L124 PetriNetUnfolderBase]: 212294/292179 cut-off events. [2023-08-04 02:11:56,913 INFO L125 PetriNetUnfolderBase]: For 35504/35504 co-relation queries the response was YES. [2023-08-04 02:11:57,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588169 conditions, 292179 events. 212294/292179 cut-off events. For 35504/35504 co-relation queries the response was YES. Maximal size of possible extension queue 12531. Compared 2371118 event pairs, 83974 based on Foata normal form. 720/224548 useless extension candidates. Maximal degree in co-relation 588130. Up to 187331 conditions per place. [2023-08-04 02:11:59,076 INFO L140 encePairwiseOnDemand]: 830/834 looper letters, 129 selfloop transitions, 3 changer transitions 1/180 dead transitions. [2023-08-04 02:11:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 728 flow [2023-08-04 02:11:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:11:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:11:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1632 transitions. [2023-08-04 02:11:59,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892086330935252 [2023-08-04 02:11:59,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1632 transitions. [2023-08-04 02:11:59,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1632 transitions. [2023-08-04 02:11:59,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:11:59,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1632 transitions. [2023-08-04 02:11:59,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:59,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:59,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:11:59,084 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 334 flow. Second operand 4 states and 1632 transitions. [2023-08-04 02:11:59,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 728 flow [2023-08-04 02:12:01,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 180 transitions, 705 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-04 02:12:01,701 INFO L231 Difference]: Finished difference. Result has 118 places, 116 transitions, 325 flow [2023-08-04 02:12:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2023-08-04 02:12:01,702 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 14 predicate places. [2023-08-04 02:12:01,702 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 325 flow [2023-08-04 02:12:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:01,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1] [2023-08-04 02:12:01,711 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 02:12:01,908 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,SelfDestructingSolverStorable15 [2023-08-04 02:12:01,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:01,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1136276478, now seen corresponding path program 1 times [2023-08-04 02:12:01,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:01,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316339609] [2023-08-04 02:12:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:12:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316339609] [2023-08-04 02:12:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316339609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829330509] [2023-08-04 02:12:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:02,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:02,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:02,053 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 02:12:02,056 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 02:12:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:02,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:12:02,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:12:02,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:12:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:12:02,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829330509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:12:02,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:12:02,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:12:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629135766] [2023-08-04 02:12:02,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:12:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:02,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 834 [2023-08-04 02:12:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 382.2) internal successors, (1911), 5 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:02,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 834 [2023-08-04 02:12:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:16,795 INFO L124 PetriNetUnfolderBase]: 157206/210386 cut-off events. [2023-08-04 02:12:16,795 INFO L125 PetriNetUnfolderBase]: For 74474/74474 co-relation queries the response was YES. [2023-08-04 02:12:17,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448526 conditions, 210386 events. 157206/210386 cut-off events. For 74474/74474 co-relation queries the response was YES. Maximal size of possible extension queue 9248. Compared 1589274 event pairs, 42636 based on Foata normal form. 2656/162084 useless extension candidates. Maximal degree in co-relation 439661. Up to 83544 conditions per place. [2023-08-04 02:12:18,546 INFO L140 encePairwiseOnDemand]: 830/834 looper letters, 141 selfloop transitions, 4 changer transitions 0/192 dead transitions. [2023-08-04 02:12:18,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 776 flow [2023-08-04 02:12:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:12:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:12:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1644 transitions. [2023-08-04 02:12:18,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-08-04 02:12:18,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1644 transitions. [2023-08-04 02:12:18,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1644 transitions. [2023-08-04 02:12:18,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:18,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1644 transitions. [2023-08-04 02:12:18,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:18,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:18,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:18,554 INFO L175 Difference]: Start difference. First operand has 118 places, 116 transitions, 325 flow. Second operand 4 states and 1644 transitions. [2023-08-04 02:12:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 776 flow [2023-08-04 02:12:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 192 transitions, 766 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:12:20,263 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 336 flow [2023-08-04 02:12:20,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-08-04 02:12:20,263 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 16 predicate places. [2023-08-04 02:12:20,263 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 336 flow [2023-08-04 02:12:20,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 382.2) internal successors, (1911), 5 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:20,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:20,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:20,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 02:12:20,464 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,SelfDestructingSolverStorable16 [2023-08-04 02:12:20,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:20,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:20,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2043259201, now seen corresponding path program 1 times [2023-08-04 02:12:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:20,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157083690] [2023-08-04 02:12:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:12:20,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:20,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157083690] [2023-08-04 02:12:20,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157083690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:20,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883437197] [2023-08-04 02:12:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:20,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:20,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:20,597 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 02:12:20,604 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 02:12:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:20,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:12:20,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:12:20,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:12:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:12:20,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883437197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:12:20,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:12:20,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:12:20,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799721181] [2023-08-04 02:12:20,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:12:20,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:20,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 834 [2023-08-04 02:12:20,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 383.0) internal successors, (1915), 5 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:20,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:20,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 834 [2023-08-04 02:12:20,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:37,174 INFO L124 PetriNetUnfolderBase]: 157161/217372 cut-off events. [2023-08-04 02:12:37,175 INFO L125 PetriNetUnfolderBase]: For 97870/97870 co-relation queries the response was YES. [2023-08-04 02:12:38,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468481 conditions, 217372 events. 157161/217372 cut-off events. For 97870/97870 co-relation queries the response was YES. Maximal size of possible extension queue 9487. Compared 1741609 event pairs, 104929 based on Foata normal form. 36/165923 useless extension candidates. Maximal degree in co-relation 459344. Up to 189152 conditions per place. [2023-08-04 02:12:38,933 INFO L140 encePairwiseOnDemand]: 830/834 looper letters, 135 selfloop transitions, 3 changer transitions 8/193 dead transitions. [2023-08-04 02:12:38,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 193 transitions, 788 flow [2023-08-04 02:12:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:12:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:12:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1644 transitions. [2023-08-04 02:12:38,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-08-04 02:12:38,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1644 transitions. [2023-08-04 02:12:38,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1644 transitions. [2023-08-04 02:12:38,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:38,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1644 transitions. [2023-08-04 02:12:38,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:38,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:38,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 834.0) internal successors, (4170), 5 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:38,941 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 336 flow. Second operand 4 states and 1644 transitions. [2023-08-04 02:12:38,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 193 transitions, 788 flow [2023-08-04 02:12:43,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 193 transitions, 784 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:43,007 INFO L231 Difference]: Finished difference. Result has 124 places, 114 transitions, 336 flow [2023-08-04 02:12:43,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2023-08-04 02:12:43,007 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 20 predicate places. [2023-08-04 02:12:43,007 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 336 flow [2023-08-04 02:12:43,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 383.0) internal successors, (1915), 5 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:43,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:43,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:43,014 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 02:12:43,209 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,SelfDestructingSolverStorable17 [2023-08-04 02:12:43,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:43,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1858048472, now seen corresponding path program 1 times [2023-08-04 02:12:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:43,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430547897] [2023-08-04 02:12:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:12:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430547897] [2023-08-04 02:12:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430547897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353719182] [2023-08-04 02:12:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:43,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:43,497 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 02:12:43,499 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 02:12:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:43,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:12:43,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:12:43,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:43,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353719182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:43,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:43,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-08-04 02:12:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708367656] [2023-08-04 02:12:43,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:43,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-04 02:12:43,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 834 [2023-08-04 02:12:43,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 114 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 367.6) internal successors, (1838), 5 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:12:43,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:43,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 834 [2023-08-04 02:12:43,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:50,305 INFO L124 PetriNetUnfolderBase]: 570100/787919 cut-off events. [2023-08-04 02:13:50,305 INFO L125 PetriNetUnfolderBase]: For 415218/415218 co-relation queries the response was YES. [2023-08-04 02:13:53,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720340 conditions, 787919 events. 570100/787919 cut-off events. For 415218/415218 co-relation queries the response was YES. Maximal size of possible extension queue 26425. Compared 7031867 event pairs, 162663 based on Foata normal form. 1862/687362 useless extension candidates. Maximal degree in co-relation 1718140. Up to 288739 conditions per place. [2023-08-04 02:13:56,994 INFO L140 encePairwiseOnDemand]: 822/834 looper letters, 322 selfloop transitions, 13 changer transitions 0/372 dead transitions. [2023-08-04 02:13:56,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 372 transitions, 1961 flow [2023-08-04 02:13:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:13:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:13:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2831 transitions. [2023-08-04 02:13:56,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48492634463857487 [2023-08-04 02:13:56,999 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2831 transitions. [2023-08-04 02:13:56,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2831 transitions. [2023-08-04 02:13:57,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:57,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2831 transitions. [2023-08-04 02:13:57,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 404.42857142857144) internal successors, (2831), 7 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:13:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 834.0) internal successors, (6672), 8 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:13:57,007 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 834.0) internal successors, (6672), 8 states have internal predecessors, (6672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:13:57,007 INFO L175 Difference]: Start difference. First operand has 124 places, 114 transitions, 336 flow. Second operand 7 states and 2831 transitions. [2023-08-04 02:13:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 372 transitions, 1961 flow [2023-08-04 02:14:22,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 372 transitions, 1913 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-04 02:14:22,082 INFO L231 Difference]: Finished difference. Result has 131 places, 127 transitions, 442 flow [2023-08-04 02:14:22,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=834, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=131, PETRI_TRANSITIONS=127} [2023-08-04 02:14:22,083 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 27 predicate places. [2023-08-04 02:14:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 127 transitions, 442 flow [2023-08-04 02:14:22,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 367.6) internal successors, (1838), 5 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:14:22,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:22,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:22,088 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 02:14:22,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:22,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:22,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1668408620, now seen corresponding path program 1 times [2023-08-04 02:14:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:22,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173737494] [2023-08-04 02:14:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:14:22,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173737494] [2023-08-04 02:14:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173737494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313804835] [2023-08-04 02:14:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:22,518 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 02:14:22,525 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 02:14:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:22,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:14:22,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:14:22,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:14:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313804835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:14:22,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:14:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2023-08-04 02:14:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376515969] [2023-08-04 02:14:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:14:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:14:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:14:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:14:22,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 834 [2023-08-04 02:14:22,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 442 flow. Second operand has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:14:22,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:22,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 834 [2023-08-04 02:14:22,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand