/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:33:19,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:33:19,264 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:33:19,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:33:19,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:33:19,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:33:19,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:33:19,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:33:19,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:33:19,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:33:19,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:33:19,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:33:19,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:33:19,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:33:19,297 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:33:19,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:33:19,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:33:19,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:33:19,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:33:19,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:33:19,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:33:19,300 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:33:19,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:33:19,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:33:19,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:33:19,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:33:19,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:33:19,302 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:33:19,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:33:19,303 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:33:19,303 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:33:19,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:33:19,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:33:19,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:33:19,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:33:19,486 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:33:19,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-trans.wvr_bound2.c [2023-08-04 08:33:20,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:33:20,551 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:33:20,551 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-trans.wvr_bound2.c [2023-08-04 08:33:20,557 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229ce2c41/35ce965dc708478d987761f483707271/FLAG4abd5fd11 [2023-08-04 08:33:20,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/229ce2c41/35ce965dc708478d987761f483707271 [2023-08-04 08:33:20,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:33:20,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:33:20,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:33:20,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:33:20,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:33:20,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:33:20" (1/1) ... [2023-08-04 08:33:20,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154a3edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:20, skipping insertion in model container [2023-08-04 08:33:20,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:33:20" (1/1) ... [2023-08-04 08:33:21,000 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:33:21,123 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-sre-trans.wvr_bound2.c[2515,2528] [2023-08-04 08:33:21,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:33:21,132 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:33:21,158 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-sre-trans.wvr_bound2.c[2515,2528] [2023-08-04 08:33:21,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:33:21,168 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:33:21,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21 WrapperNode [2023-08-04 08:33:21,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:33:21,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:33:21,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:33:21,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:33:21,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,191 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 121 [2023-08-04 08:33:21,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:33:21,191 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:33:21,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:33:21,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:33:21,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:33:21,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:33:21,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:33:21,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:33:21,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (1/1) ... [2023-08-04 08:33:21,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:33:21,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:21,246 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 08:33:21,254 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 08:33:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:33:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:33:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:33:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:33:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:33:21,273 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:33:21,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:33:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:33:21,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:33:21,275 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 08:33:21,337 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:33:21,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:33:21,501 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:33:21,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:33:21,507 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:33:21,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:33:21 BoogieIcfgContainer [2023-08-04 08:33:21,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:33:21,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:33:21,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:33:21,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:33:21,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:33:20" (1/3) ... [2023-08-04 08:33:21,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46277518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:33:21, skipping insertion in model container [2023-08-04 08:33:21,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:33:21" (2/3) ... [2023-08-04 08:33:21,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46277518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:33:21, skipping insertion in model container [2023-08-04 08:33:21,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:33:21" (3/3) ... [2023-08-04 08:33:21,514 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-sre-trans.wvr_bound2.c [2023-08-04 08:33:21,521 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:33:21,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:33:21,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:33:21,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:33:21,577 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:33:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 132 transitions, 306 flow [2023-08-04 08:33:21,755 INFO L124 PetriNetUnfolderBase]: 82/572 cut-off events. [2023-08-04 08:33:21,755 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:33:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 572 events. 82/572 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2876 event pairs, 0 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 325. Up to 16 conditions per place. [2023-08-04 08:33:21,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 132 transitions, 306 flow [2023-08-04 08:33:21,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 119 transitions, 274 flow [2023-08-04 08:33:21,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:21,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 119 transitions, 274 flow [2023-08-04 08:33:21,804 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 119 transitions, 274 flow [2023-08-04 08:33:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 274 flow [2023-08-04 08:33:21,849 INFO L124 PetriNetUnfolderBase]: 82/485 cut-off events. [2023-08-04 08:33:21,850 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:33:21,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 485 events. 82/485 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2217 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2023-08-04 08:33:21,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-08-04 08:33:23,850 INFO L134 LiptonReduction]: Checked pairs total: 3408 [2023-08-04 08:33:23,851 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 08:33:23,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:33:23,867 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;@668d51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:23,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:33:23,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:23,871 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 08:33:23,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:23,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:23,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:23,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:23,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 933456754, now seen corresponding path program 1 times [2023-08-04 08:33:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:23,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693675296] [2023-08-04 08:33:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:24,047 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 08:33:24,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:24,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693675296] [2023-08-04 08:33:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693675296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:24,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355853452] [2023-08-04 08:33:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:24,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:24,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:24,233 INFO L124 PetriNetUnfolderBase]: 372/747 cut-off events. [2023-08-04 08:33:24,233 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 08:33:24,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 747 events. 372/747 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3570 event pairs, 188 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 1084. Up to 687 conditions per place. [2023-08-04 08:33:24,240 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 33 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-08-04 08:33:24,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 186 flow [2023-08-04 08:33:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-04 08:33:24,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348148148148149 [2023-08-04 08:33:24,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-04 08:33:24,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-04 08:33:24,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:24,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-04 08:33:24,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,286 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 110 flow. Second operand 3 states and 361 transitions. [2023-08-04 08:33:24,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 186 flow [2023-08-04 08:33:24,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:33:24,296 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 106 flow [2023-08-04 08:33:24,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-08-04 08:33:24,300 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-04 08:33:24,300 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 106 flow [2023-08-04 08:33:24,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:24,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:24,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:33:24,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:24,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 627160707, now seen corresponding path program 1 times [2023-08-04 08:33:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441528579] [2023-08-04 08:33:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:33:24,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:24,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441528579] [2023-08-04 08:33:24,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441528579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:24,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245725778] [2023-08-04 08:33:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:24,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:24,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:24,381 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 08:33:24,384 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 08:33:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:24,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:24,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:24,453 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 08:33:24,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245725778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:24,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:24,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099056600] [2023-08-04 08:33:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:24,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:24,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:24,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:24,549 INFO L124 PetriNetUnfolderBase]: 354/713 cut-off events. [2023-08-04 08:33:24,549 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:33:24,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 713 events. 354/713 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3275 event pairs, 189 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 841. Up to 645 conditions per place. [2023-08-04 08:33:24,552 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 34 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:33:24,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 186 flow [2023-08-04 08:33:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-04 08:33:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362962962962963 [2023-08-04 08:33:24,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-04 08:33:24,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-04 08:33:24,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:24,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-04 08:33:24,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,557 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 106 flow. Second operand 3 states and 362 transitions. [2023-08-04 08:33:24,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 186 flow [2023-08-04 08:33:24,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:24,559 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 110 flow [2023-08-04 08:33:24,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2023-08-04 08:33:24,559 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-08-04 08:33:24,559 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 110 flow [2023-08-04 08:33:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:24,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:24,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:24,765 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 08:33:24,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:24,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1414446783, now seen corresponding path program 1 times [2023-08-04 08:33:24,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:24,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875139510] [2023-08-04 08:33:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:24,841 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 08:33:24,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875139510] [2023-08-04 08:33:24,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875139510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806522914] [2023-08-04 08:33:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:24,865 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 08:33:24,894 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 08:33:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:24,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:24,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:24,950 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 08:33:24,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806522914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069195060] [2023-08-04 08:33:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:24,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:24,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:24,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:24,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:24,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:25,089 INFO L124 PetriNetUnfolderBase]: 350/709 cut-off events. [2023-08-04 08:33:25,090 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:33:25,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 709 events. 350/709 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3050 event pairs, 194 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 838. Up to 621 conditions per place. [2023-08-04 08:33:25,094 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 08:33:25,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 194 flow [2023-08-04 08:33:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 08:33:25,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2023-08-04 08:33:25,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 08:33:25,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 08:33:25,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:25,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 08:33:25,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,101 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 110 flow. Second operand 3 states and 363 transitions. [2023-08-04 08:33:25,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 194 flow [2023-08-04 08:33:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:25,103 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 114 flow [2023-08-04 08:33:25,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-04 08:33:25,103 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-04 08:33:25,104 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 114 flow [2023-08-04 08:33:25,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:25,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:25,126 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 08:33:25,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:33:25,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:25,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2048470192, now seen corresponding path program 1 times [2023-08-04 08:33:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:25,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398622832] [2023-08-04 08:33:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:25,382 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 08:33:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398622832] [2023-08-04 08:33:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398622832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722879344] [2023-08-04 08:33:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:25,393 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 08:33:25,425 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 08:33:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:25,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:25,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:25,503 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 08:33:25,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722879344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:25,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:25,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910881359] [2023-08-04 08:33:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:25,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:25,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:25,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:25,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:25,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:25,591 INFO L124 PetriNetUnfolderBase]: 242/513 cut-off events. [2023-08-04 08:33:25,592 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 08:33:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 513 events. 242/513 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1988 event pairs, 169 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 650. Up to 417 conditions per place. [2023-08-04 08:33:25,594 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 08:33:25,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 220 flow [2023-08-04 08:33:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 08:33:25,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437037037037037 [2023-08-04 08:33:25,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 08:33:25,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 08:33:25,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:25,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 08:33:25,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,598 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 114 flow. Second operand 3 states and 367 transitions. [2023-08-04 08:33:25,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 220 flow [2023-08-04 08:33:25,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:25,599 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 122 flow [2023-08-04 08:33:25,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-04 08:33:25,600 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 08:33:25,600 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 122 flow [2023-08-04 08:33:25,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:25,600 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] [2023-08-04 08:33:25,607 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 08:33:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:25,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:25,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1820544946, now seen corresponding path program 1 times [2023-08-04 08:33:25,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:25,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148975636] [2023-08-04 08:33:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:25,894 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 08:33:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148975636] [2023-08-04 08:33:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148975636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109545164] [2023-08-04 08:33:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:25,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:25,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:25,899 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 08:33:25,901 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 08:33:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:25,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:25,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:25,967 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 08:33:25,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109545164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015346989] [2023-08-04 08:33:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:25,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:25,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:25,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:25,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:25,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:26,047 INFO L124 PetriNetUnfolderBase]: 193/432 cut-off events. [2023-08-04 08:33:26,047 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-04 08:33:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 432 events. 193/432 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1566 event pairs, 146 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 583. Up to 319 conditions per place. [2023-08-04 08:33:26,049 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:33:26,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 230 flow [2023-08-04 08:33:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 08:33:26,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437037037037037 [2023-08-04 08:33:26,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 08:33:26,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 08:33:26,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:26,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 08:33:26,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,053 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 122 flow. Second operand 3 states and 367 transitions. [2023-08-04 08:33:26,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 230 flow [2023-08-04 08:33:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:26,055 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 132 flow [2023-08-04 08:33:26,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-04 08:33:26,057 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 08:33:26,057 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 132 flow [2023-08-04 08:33:26,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:26,057 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 08:33:26,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:33:26,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:26,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:26,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1685835761, now seen corresponding path program 1 times [2023-08-04 08:33:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:26,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081480961] [2023-08-04 08:33:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:26,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:26,368 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 08:33:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081480961] [2023-08-04 08:33:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081480961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:26,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612098868] [2023-08-04 08:33:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:26,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:26,370 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 08:33:26,372 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 08:33:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:26,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:26,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:26,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612098868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:26,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:26,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:33:26,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906042324] [2023-08-04 08:33:26,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:26,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:26,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 225 [2023-08-04 08:33:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 225 [2023-08-04 08:33:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:26,545 INFO L124 PetriNetUnfolderBase]: 189/424 cut-off events. [2023-08-04 08:33:26,546 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-04 08:33:26,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 424 events. 189/424 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1515 event pairs, 171 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 628. Up to 374 conditions per place. [2023-08-04 08:33:26,547 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 35 selfloop transitions, 2 changer transitions 3/43 dead transitions. [2023-08-04 08:33:26,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 220 flow [2023-08-04 08:33:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 08:33:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2023-08-04 08:33:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 08:33:26,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 08:33:26,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:26,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 08:33:26,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,555 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 132 flow. Second operand 3 states and 363 transitions. [2023-08-04 08:33:26,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 220 flow [2023-08-04 08:33:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:26,557 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 130 flow [2023-08-04 08:33:26,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 08:33:26,559 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-08-04 08:33:26,559 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 130 flow [2023-08-04 08:33:26,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:26,560 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] [2023-08-04 08:33:26,569 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 08:33:26,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:26,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:26,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2118844509, now seen corresponding path program 1 times [2023-08-04 08:33:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:26,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555253741] [2023-08-04 08:33:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:26,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:26,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555253741] [2023-08-04 08:33:26,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555253741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:26,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499984583] [2023-08-04 08:33:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:26,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:26,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:26,829 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 08:33:26,848 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 08:33:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:26,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:26,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:26,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:26,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499984583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:26,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:26,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104751243] [2023-08-04 08:33:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:26,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 225 [2023-08-04 08:33:26,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:26,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 225 [2023-08-04 08:33:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:26,952 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:33:26,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:33:26,952 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:33:26,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:33:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-04 08:33:26,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2023-08-04 08:33:26,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-04 08:33:26,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-04 08:33:26,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:26,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-04 08:33:26,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,957 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 130 flow. Second operand 4 states and 436 transitions. [2023-08-04 08:33:26,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:33:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:26,958 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:33:26,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:33:26,958 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -17 predicate places. [2023-08-04 08:33:26,958 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:33:26,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:26,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:33:26,981 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 08:33:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:27,170 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:27,171 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:33:27,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 132 transitions, 306 flow [2023-08-04 08:33:27,211 INFO L124 PetriNetUnfolderBase]: 82/572 cut-off events. [2023-08-04 08:33:27,211 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:33:27,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 572 events. 82/572 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2876 event pairs, 0 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 325. Up to 16 conditions per place. [2023-08-04 08:33:27,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 132 transitions, 306 flow [2023-08-04 08:33:27,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 76 transitions, 167 flow [2023-08-04 08:33:27,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:27,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 08:33:27,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 08:33:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 167 flow [2023-08-04 08:33:27,219 INFO L124 PetriNetUnfolderBase]: 6/172 cut-off events. [2023-08-04 08:33:27,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:27,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 172 events. 6/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 437 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:33:27,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 486 [2023-08-04 08:33:28,821 INFO L134 LiptonReduction]: Checked pairs total: 351 [2023-08-04 08:33:28,821 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-04 08:33:28,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:33:28,823 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;@668d51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:28,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:33:28,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:28,824 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 08:33:28,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:28,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:28,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:33:28,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:28,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1975203106, now seen corresponding path program 1 times [2023-08-04 08:33:28,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:28,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710922687] [2023-08-04 08:33:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:28,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:28,859 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 08:33:28,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:28,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710922687] [2023-08-04 08:33:28,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710922687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:28,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:28,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748619315] [2023-08-04 08:33:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:28,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 195 [2023-08-04 08:33:28,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:28,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:28,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 195 [2023-08-04 08:33:28,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:28,892 INFO L124 PetriNetUnfolderBase]: 45/109 cut-off events. [2023-08-04 08:33:28,892 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:33:28,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 109 events. 45/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 314 event pairs, 20 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 224. Up to 96 conditions per place. [2023-08-04 08:33:28,892 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-04 08:33:28,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 85 flow [2023-08-04 08:33:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-04 08:33:28,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582905982905983 [2023-08-04 08:33:28,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-04 08:33:28,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-04 08:33:28,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:28,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-04 08:33:28,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:28,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:28,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:28,895 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 49 flow. Second operand 3 states and 341 transitions. [2023-08-04 08:33:28,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 85 flow [2023-08-04 08:33:28,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:33:28,896 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 57 flow [2023-08-04 08:33:28,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-04 08:33:28,897 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-04 08:33:28,897 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 57 flow [2023-08-04 08:33:28,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:28,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:28,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:33:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:33:28,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:28,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1956825101, now seen corresponding path program 1 times [2023-08-04 08:33:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:28,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457071873] [2023-08-04 08:33:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:33:28,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:33:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:33:28,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:33:28,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:33:28,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:33:28,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:33:28,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:33:28,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:33:28,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:33:28,932 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:33:28,932 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:33:28,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:33:28,946 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:33:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 153 transitions, 396 flow [2023-08-04 08:33:29,187 INFO L124 PetriNetUnfolderBase]: 834/3928 cut-off events. [2023-08-04 08:33:29,187 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:33:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4602 conditions, 3928 events. 834/3928 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 31320 event pairs, 11 based on Foata normal form. 0/3338 useless extension candidates. Maximal degree in co-relation 2317. Up to 192 conditions per place. [2023-08-04 08:33:29,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 153 transitions, 396 flow [2023-08-04 08:33:29,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 140 transitions, 358 flow [2023-08-04 08:33:29,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:33:29,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 140 transitions, 358 flow [2023-08-04 08:33:29,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 140 transitions, 358 flow [2023-08-04 08:33:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 140 transitions, 358 flow [2023-08-04 08:33:29,366 INFO L124 PetriNetUnfolderBase]: 834/3275 cut-off events. [2023-08-04 08:33:29,366 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-08-04 08:33:29,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3923 conditions, 3275 events. 834/3275 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 23802 event pairs, 11 based on Foata normal form. 0/2749 useless extension candidates. Maximal degree in co-relation 1985. Up to 192 conditions per place. [2023-08-04 08:33:29,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 2988 [2023-08-04 08:33:31,303 INFO L134 LiptonReduction]: Checked pairs total: 11304 [2023-08-04 08:33:31,304 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 08:33:31,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:33:31,307 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;@668d51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:31,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:33:31,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:31,308 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 08:33:31,308 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:33:31,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:31,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:31,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:31,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 147375478, now seen corresponding path program 1 times [2023-08-04 08:33:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:31,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848342722] [2023-08-04 08:33:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:31,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:31,328 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 08:33:31,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:31,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848342722] [2023-08-04 08:33:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848342722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:33:31,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6056785] [2023-08-04 08:33:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:31,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:31,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:31,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:31,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:31,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:31,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:33,060 INFO L124 PetriNetUnfolderBase]: 19931/29893 cut-off events. [2023-08-04 08:33:33,060 INFO L125 PetriNetUnfolderBase]: For 6986/6986 co-relation queries the response was YES. [2023-08-04 08:33:33,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62676 conditions, 29893 events. 19931/29893 cut-off events. For 6986/6986 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 186644 event pairs, 13302 based on Foata normal form. 0/27327 useless extension candidates. Maximal degree in co-relation 25235. Up to 28006 conditions per place. [2023-08-04 08:33:33,195 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 50 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 08:33:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 298 flow [2023-08-04 08:33:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-04 08:33:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408299866131191 [2023-08-04 08:33:33,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-04 08:33:33,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-04 08:33:33,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:33,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-04 08:33:33,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:33,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:33,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:33,199 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 188 flow. Second operand 3 states and 404 transitions. [2023-08-04 08:33:33,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 298 flow [2023-08-04 08:33:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:33:33,227 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 188 flow [2023-08-04 08:33:33,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-04 08:33:33,228 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-04 08:33:33,228 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 188 flow [2023-08-04 08:33:33,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:33,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:33,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:33:33,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:33,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash 569702711, now seen corresponding path program 1 times [2023-08-04 08:33:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293788894] [2023-08-04 08:33:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:33:33,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293788894] [2023-08-04 08:33:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293788894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836123670] [2023-08-04 08:33:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:33,253 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 08:33:33,255 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 08:33:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:33,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:33,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:33,309 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 08:33:33,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836123670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310564455] [2023-08-04 08:33:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:33,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:33,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:33,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:33,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:33,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:34,881 INFO L124 PetriNetUnfolderBase]: 19717/29517 cut-off events. [2023-08-04 08:33:34,881 INFO L125 PetriNetUnfolderBase]: For 4002/4002 co-relation queries the response was YES. [2023-08-04 08:33:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61849 conditions, 29517 events. 19717/29517 cut-off events. For 4002/4002 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 184366 event pairs, 13229 based on Foata normal form. 0/27029 useless extension candidates. Maximal degree in co-relation 61819. Up to 27632 conditions per place. [2023-08-04 08:33:34,984 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 08:33:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 08:33:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-04 08:33:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435073627844712 [2023-08-04 08:33:34,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-04 08:33:34,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-04 08:33:34,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:34,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-04 08:33:34,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,989 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 188 flow. Second operand 3 states and 406 transitions. [2023-08-04 08:33:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 08:33:34,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:34,992 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 198 flow [2023-08-04 08:33:34,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2023-08-04 08:33:34,993 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-04 08:33:34,993 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 198 flow [2023-08-04 08:33:34,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:34,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:34,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:33:35,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:35,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:35,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 953663695, now seen corresponding path program 1 times [2023-08-04 08:33:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:35,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239455378] [2023-08-04 08:33:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:35,224 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 08:33:35,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239455378] [2023-08-04 08:33:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239455378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409410001] [2023-08-04 08:33:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:35,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:35,226 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 08:33:35,228 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 08:33:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:35,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:35,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:35,286 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 08:33:35,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409410001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:35,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:35,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:35,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144440513] [2023-08-04 08:33:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:35,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:35,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:35,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:35,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:35,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:35,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:35,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:36,994 INFO L124 PetriNetUnfolderBase]: 19681/29763 cut-off events. [2023-08-04 08:33:36,994 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 08:33:37,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 29763 events. 19681/29763 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 189628 event pairs, 13174 based on Foata normal form. 0/27359 useless extension candidates. Maximal degree in co-relation 27274. Up to 27256 conditions per place. [2023-08-04 08:33:37,097 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 08:33:37,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 328 flow [2023-08-04 08:33:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-04 08:33:37,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461847389558233 [2023-08-04 08:33:37,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-04 08:33:37,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-04 08:33:37,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:37,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-04 08:33:37,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:37,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:37,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:37,100 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 198 flow. Second operand 3 states and 408 transitions. [2023-08-04 08:33:37,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 328 flow [2023-08-04 08:33:37,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:37,105 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 208 flow [2023-08-04 08:33:37,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-04 08:33:37,106 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-08-04 08:33:37,106 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 208 flow [2023-08-04 08:33:37,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:37,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:37,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:37,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:33:37,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:33:37,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:37,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2078782903, now seen corresponding path program 1 times [2023-08-04 08:33:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:37,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025586629] [2023-08-04 08:33:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:37,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:37,350 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 08:33:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:37,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025586629] [2023-08-04 08:33:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025586629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413632808] [2023-08-04 08:33:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:37,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:37,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:37,373 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 08:33:37,375 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 08:33:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:37,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:37,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:37,439 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 08:33:37,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413632808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:37,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593484650] [2023-08-04 08:33:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:37,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:37,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:37,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:37,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:37,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:39,263 INFO L124 PetriNetUnfolderBase]: 18785/28651 cut-off events. [2023-08-04 08:33:39,264 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:33:39,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60517 conditions, 28651 events. 18785/28651 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 183899 event pairs, 13063 based on Foata normal form. 0/26655 useless extension candidates. Maximal degree in co-relation 28822. Up to 23580 conditions per place. [2023-08-04 08:33:39,365 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 08:33:39,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 383 flow [2023-08-04 08:33:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 08:33:39,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 08:33:39,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 08:33:39,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 08:33:39,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:39,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 08:33:39,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:39,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:39,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:39,369 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 208 flow. Second operand 3 states and 415 transitions. [2023-08-04 08:33:39,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 383 flow [2023-08-04 08:33:39,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:39,372 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 218 flow [2023-08-04 08:33:39,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-04 08:33:39,373 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2023-08-04 08:33:39,373 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 218 flow [2023-08-04 08:33:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:39,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:39,378 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 08:33:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:33:39,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:39,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1607868201, now seen corresponding path program 1 times [2023-08-04 08:33:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:39,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72420741] [2023-08-04 08:33:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:39,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:39,610 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 08:33:39,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72420741] [2023-08-04 08:33:39,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72420741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654787192] [2023-08-04 08:33:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:39,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:39,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:39,611 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 08:33:39,614 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 08:33:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:39,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:39,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:39,674 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 08:33:39,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654787192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:33:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239430232] [2023-08-04 08:33:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:39,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:39,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:39,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:39,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:39,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:39,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:41,399 INFO L124 PetriNetUnfolderBase]: 18576/28798 cut-off events. [2023-08-04 08:33:41,399 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:33:41,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63359 conditions, 28798 events. 18576/28798 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 186691 event pairs, 12252 based on Foata normal form. 0/27851 useless extension candidates. Maximal degree in co-relation 32424. Up to 20868 conditions per place. [2023-08-04 08:33:41,477 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:33:41,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 395 flow [2023-08-04 08:33:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 08:33:41,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 08:33:41,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 08:33:41,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 08:33:41,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:41,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 08:33:41,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:41,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:41,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:41,481 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 218 flow. Second operand 3 states and 415 transitions. [2023-08-04 08:33:41,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 395 flow [2023-08-04 08:33:41,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:41,491 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 228 flow [2023-08-04 08:33:41,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 08:33:41,492 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-04 08:33:41,492 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 228 flow [2023-08-04 08:33:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:41,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:41,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:41,496 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 08:33:41,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:33:41,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:41,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2087406905, now seen corresponding path program 1 times [2023-08-04 08:33:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:41,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486025282] [2023-08-04 08:33:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:41,726 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 08:33:41,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:41,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486025282] [2023-08-04 08:33:41,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486025282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:41,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228052357] [2023-08-04 08:33:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:41,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:41,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:41,727 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 08:33:41,729 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 08:33:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:41,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:33:41,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:41,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:41,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228052357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:41,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:41,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:33:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186198216] [2023-08-04 08:33:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:41,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:41,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:41,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 249 [2023-08-04 08:33:41,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:41,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:41,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 249 [2023-08-04 08:33:41,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:43,895 INFO L124 PetriNetUnfolderBase]: 18847/29441 cut-off events. [2023-08-04 08:33:43,895 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:33:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66720 conditions, 29441 events. 18847/29441 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 191015 event pairs, 14123 based on Foata normal form. 0/29207 useless extension candidates. Maximal degree in co-relation 35088. Up to 23742 conditions per place. [2023-08-04 08:33:44,038 INFO L140 encePairwiseOnDemand]: 246/249 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:33:44,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 407 flow [2023-08-04 08:33:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 08:33:44,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 08:33:44,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 08:33:44,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 08:33:44,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:44,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 08:33:44,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:44,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:44,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:44,042 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 228 flow. Second operand 3 states and 415 transitions. [2023-08-04 08:33:44,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 407 flow [2023-08-04 08:33:44,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:44,216 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 238 flow [2023-08-04 08:33:44,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-04 08:33:44,216 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2023-08-04 08:33:44,216 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 238 flow [2023-08-04 08:33:44,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:44,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:44,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:44,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:44,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:33:44,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:44,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash -453992844, now seen corresponding path program 1 times [2023-08-04 08:33:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:44,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588323189] [2023-08-04 08:33:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588323189] [2023-08-04 08:33:44,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588323189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132106606] [2023-08-04 08:33:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:44,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:44,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:44,467 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 08:33:44,468 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 08:33:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:44,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:44,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:44,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:33:44,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132106606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:44,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:44,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:44,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599923889] [2023-08-04 08:33:44,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:44,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:44,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:44,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:44,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:44,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:44,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:44,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:46,216 INFO L124 PetriNetUnfolderBase]: 17691/27603 cut-off events. [2023-08-04 08:33:46,217 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:33:46,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63363 conditions, 27603 events. 17691/27603 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 179991 event pairs, 10191 based on Foata normal form. 2/27604 useless extension candidates. Maximal degree in co-relation 48888. Up to 25640 conditions per place. [2023-08-04 08:33:46,368 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 08:33:46,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 368 flow [2023-08-04 08:33:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-04 08:33:46,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220883534136547 [2023-08-04 08:33:46,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-04 08:33:46,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-04 08:33:46,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:46,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-04 08:33:46,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:46,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:46,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:46,373 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 238 flow. Second operand 4 states and 520 transitions. [2023-08-04 08:33:46,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 368 flow [2023-08-04 08:33:46,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:46,634 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 250 flow [2023-08-04 08:33:46,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-04 08:33:46,634 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-08-04 08:33:46,634 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 250 flow [2023-08-04 08:33:46,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:46,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:46,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:46,642 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 08:33:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:33:46,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:46,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1759412338, now seen corresponding path program 1 times [2023-08-04 08:33:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238820244] [2023-08-04 08:33:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:33:46,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238820244] [2023-08-04 08:33:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238820244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368880103] [2023-08-04 08:33:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:46,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:46,917 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 08:33:46,944 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 08:33:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:46,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:46,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:33:47,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:33:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368880103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:47,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:47,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331201629] [2023-08-04 08:33:47,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:47,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:47,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:47,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:47,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:47,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:49,045 INFO L124 PetriNetUnfolderBase]: 16839/26275 cut-off events. [2023-08-04 08:33:49,045 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:33:49,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60198 conditions, 26275 events. 16839/26275 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 171212 event pairs, 9864 based on Foata normal form. 8/26282 useless extension candidates. Maximal degree in co-relation 45955. Up to 24296 conditions per place. [2023-08-04 08:33:49,191 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 08:33:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 396 flow [2023-08-04 08:33:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-04 08:33:49,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261044176706827 [2023-08-04 08:33:49,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-04 08:33:49,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-04 08:33:49,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:49,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-04 08:33:49,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:49,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:49,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:49,195 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 250 flow. Second operand 4 states and 524 transitions. [2023-08-04 08:33:49,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 396 flow [2023-08-04 08:33:49,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 386 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:33:49,369 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 254 flow [2023-08-04 08:33:49,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-04 08:33:49,370 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2023-08-04 08:33:49,370 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 254 flow [2023-08-04 08:33:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:49,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:49,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 08:33:49,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:49,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1824154551, now seen corresponding path program 1 times [2023-08-04 08:33:49,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:49,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306201989] [2023-08-04 08:33:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:49,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:33:49,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:49,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306201989] [2023-08-04 08:33:49,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306201989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:49,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478775434] [2023-08-04 08:33:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:49,639 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 08:33:49,642 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 08:33:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:49,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:49,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:33:49,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:33:49,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478775434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:49,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:49,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378437739] [2023-08-04 08:33:49,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:49,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:49,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:49,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:49,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:49,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:49,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:51,529 INFO L124 PetriNetUnfolderBase]: 16407/25603 cut-off events. [2023-08-04 08:33:51,530 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:33:51,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58010 conditions, 25603 events. 16407/25603 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 165199 event pairs, 9523 based on Foata normal form. 32/25634 useless extension candidates. Maximal degree in co-relation 43949. Up to 22968 conditions per place. [2023-08-04 08:33:51,613 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 64 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 08:33:51,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 416 flow [2023-08-04 08:33:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-08-04 08:33:51,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5301204819277109 [2023-08-04 08:33:51,615 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-08-04 08:33:51,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-08-04 08:33:51,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:51,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-08-04 08:33:51,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:51,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:51,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:51,617 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 254 flow. Second operand 4 states and 528 transitions. [2023-08-04 08:33:51,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 416 flow [2023-08-04 08:33:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 406 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:33:51,735 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 258 flow [2023-08-04 08:33:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-04 08:33:51,736 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-08-04 08:33:51,736 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 258 flow [2023-08-04 08:33:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:51,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:51,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:51,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:51,937 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:51,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1171152424, now seen corresponding path program 1 times [2023-08-04 08:33:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701096526] [2023-08-04 08:33:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:33:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701096526] [2023-08-04 08:33:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701096526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798254838] [2023-08-04 08:33:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:52,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:52,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:52,045 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:52,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:33:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:52,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:52,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:33:52,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:33:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798254838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:52,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663585224] [2023-08-04 08:33:52,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:52,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:52,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:52,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:53,131 INFO L124 PetriNetUnfolderBase]: 10315/16383 cut-off events. [2023-08-04 08:33:53,131 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:33:53,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 16383 events. 10315/16383 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 98869 event pairs, 5374 based on Foata normal form. 192/16574 useless extension candidates. Maximal degree in co-relation 32048. Up to 9425 conditions per place. [2023-08-04 08:33:53,191 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 71 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 08:33:53,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 461 flow [2023-08-04 08:33:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2023-08-04 08:33:53,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371485943775101 [2023-08-04 08:33:53,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 535 transitions. [2023-08-04 08:33:53,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 535 transitions. [2023-08-04 08:33:53,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:53,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 535 transitions. [2023-08-04 08:33:53,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:53,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:53,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:53,195 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 258 flow. Second operand 4 states and 535 transitions. [2023-08-04 08:33:53,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 461 flow [2023-08-04 08:33:53,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:33:53,262 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 268 flow [2023-08-04 08:33:53,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-04 08:33:53,263 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2023-08-04 08:33:53,263 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 268 flow [2023-08-04 08:33:53,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:53,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:53,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:53,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:53,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:53,464 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:53,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 459901308, now seen corresponding path program 1 times [2023-08-04 08:33:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:53,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241139461] [2023-08-04 08:33:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:53,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:33:53,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241139461] [2023-08-04 08:33:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241139461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:53,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649807998] [2023-08-04 08:33:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:53,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:53,515 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:53,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:33:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:53,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:33:53,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:33:53,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649807998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:53,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:53,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109001726] [2023-08-04 08:33:53,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:53,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:53,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:53,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:53,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:53,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:54,466 INFO L124 PetriNetUnfolderBase]: 9415/14912 cut-off events. [2023-08-04 08:33:54,466 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:33:54,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35765 conditions, 14912 events. 9415/14912 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87964 event pairs, 5942 based on Foata normal form. 233/15144 useless extension candidates. Maximal degree in co-relation 34698. Up to 8732 conditions per place. [2023-08-04 08:33:54,521 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 08:33:54,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 472 flow [2023-08-04 08:33:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2023-08-04 08:33:54,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371485943775101 [2023-08-04 08:33:54,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 535 transitions. [2023-08-04 08:33:54,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 535 transitions. [2023-08-04 08:33:54,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:54,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 535 transitions. [2023-08-04 08:33:54,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:54,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:54,525 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:54,525 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 268 flow. Second operand 4 states and 535 transitions. [2023-08-04 08:33:54,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 472 flow [2023-08-04 08:33:54,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 468 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:54,584 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 284 flow [2023-08-04 08:33:54,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-08-04 08:33:54,585 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-08-04 08:33:54,585 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 284 flow [2023-08-04 08:33:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:54,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:54,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:54,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:54,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:54,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:54,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash 751132093, now seen corresponding path program 1 times [2023-08-04 08:33:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733574853] [2023-08-04 08:33:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:33:54,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:54,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733574853] [2023-08-04 08:33:54,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733574853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:54,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573673634] [2023-08-04 08:33:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:54,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:54,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:54,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:54,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:33:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:54,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:54,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:33:54,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:33:54,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573673634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:54,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:54,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975845991] [2023-08-04 08:33:54,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:54,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:54,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 249 [2023-08-04 08:33:54,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:54,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:54,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 249 [2023-08-04 08:33:54,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:55,823 INFO L124 PetriNetUnfolderBase]: 9409/14895 cut-off events. [2023-08-04 08:33:55,823 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:33:55,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37434 conditions, 14895 events. 9409/14895 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87815 event pairs, 8414 based on Foata normal form. 13/14907 useless extension candidates. Maximal degree in co-relation 36338. Up to 13453 conditions per place. [2023-08-04 08:33:55,875 INFO L140 encePairwiseOnDemand]: 245/249 looper letters, 71 selfloop transitions, 3 changer transitions 3/83 dead transitions. [2023-08-04 08:33:55,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 490 flow [2023-08-04 08:33:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2023-08-04 08:33:55,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371485943775101 [2023-08-04 08:33:55,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 535 transitions. [2023-08-04 08:33:55,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 535 transitions. [2023-08-04 08:33:55,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:55,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 535 transitions. [2023-08-04 08:33:55,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:55,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:55,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:55,879 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 284 flow. Second operand 4 states and 535 transitions. [2023-08-04 08:33:55,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 490 flow [2023-08-04 08:33:56,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:56,001 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 282 flow [2023-08-04 08:33:56,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-04 08:33:56,001 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2023-08-04 08:33:56,001 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 282 flow [2023-08-04 08:33:56,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:56,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:56,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:56,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:56,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:56,206 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:56,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1021054770, now seen corresponding path program 1 times [2023-08-04 08:33:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:56,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549855181] [2023-08-04 08:33:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:56,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:33:56,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549855181] [2023-08-04 08:33:56,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549855181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599923252] [2023-08-04 08:33:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:56,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:56,732 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:56,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:33:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:56,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:33:56,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:33:58,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:33:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599923252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:58,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 08:33:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811923087] [2023-08-04 08:33:58,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:58,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 08:33:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 08:33:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-04 08:33:58,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-04 08:33:58,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 114.33333333333333) internal successors, (1372), 12 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:58,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:58,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-04 08:33:58,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:01,621 INFO L124 PetriNetUnfolderBase]: 18628/29522 cut-off events. [2023-08-04 08:34:01,621 INFO L125 PetriNetUnfolderBase]: For 17077/17077 co-relation queries the response was YES. [2023-08-04 08:34:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72750 conditions, 29522 events. 18628/29522 cut-off events. For 17077/17077 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 202278 event pairs, 2018 based on Foata normal form. 3/29402 useless extension candidates. Maximal degree in co-relation 72210. Up to 8862 conditions per place. [2023-08-04 08:34:01,757 INFO L140 encePairwiseOnDemand]: 241/249 looper letters, 107 selfloop transitions, 13 changer transitions 147/273 dead transitions. [2023-08-04 08:34:01,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 273 transitions, 1818 flow [2023-08-04 08:34:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:34:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:34:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1195 transitions. [2023-08-04 08:34:01,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533244087460955 [2023-08-04 08:34:01,760 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1195 transitions. [2023-08-04 08:34:01,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1195 transitions. [2023-08-04 08:34:01,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:01,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1195 transitions. [2023-08-04 08:34:01,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.77777777777777) internal successors, (1195), 9 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:01,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:01,766 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:01,766 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 282 flow. Second operand 9 states and 1195 transitions. [2023-08-04 08:34:01,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 273 transitions, 1818 flow [2023-08-04 08:34:02,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 273 transitions, 1765 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:02,331 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 340 flow [2023-08-04 08:34:02,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=340, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-08-04 08:34:02,331 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-08-04 08:34:02,331 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 340 flow [2023-08-04 08:34:02,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.33333333333333) internal successors, (1372), 12 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:02,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:02,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:02,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:02,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:02,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:02,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1625628022, now seen corresponding path program 2 times [2023-08-04 08:34:02,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:02,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765657007] [2023-08-04 08:34:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:02,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:34:02,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:02,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765657007] [2023-08-04 08:34:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765657007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:02,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:02,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:34:02,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271964660] [2023-08-04 08:34:02,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:02,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:02,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:02,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-04 08:34:02,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:02,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-04 08:34:02,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:03,723 INFO L124 PetriNetUnfolderBase]: 5273/10967 cut-off events. [2023-08-04 08:34:03,723 INFO L125 PetriNetUnfolderBase]: For 10779/10779 co-relation queries the response was YES. [2023-08-04 08:34:03,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32402 conditions, 10967 events. 5273/10967 cut-off events. For 10779/10779 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 91751 event pairs, 1305 based on Foata normal form. 1/10924 useless extension candidates. Maximal degree in co-relation 32374. Up to 4891 conditions per place. [2023-08-04 08:34:03,754 INFO L140 encePairwiseOnDemand]: 241/249 looper letters, 101 selfloop transitions, 11 changer transitions 55/173 dead transitions. [2023-08-04 08:34:03,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 173 transitions, 1171 flow [2023-08-04 08:34:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:34:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:34:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 782 transitions. [2023-08-04 08:34:03,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234270414993306 [2023-08-04 08:34:03,756 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 782 transitions. [2023-08-04 08:34:03,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 782 transitions. [2023-08-04 08:34:03,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:03,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 782 transitions. [2023-08-04 08:34:03,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:03,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:03,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:03,759 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 340 flow. Second operand 6 states and 782 transitions. [2023-08-04 08:34:03,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 173 transitions, 1171 flow [2023-08-04 08:34:03,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 173 transitions, 1164 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:03,999 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 357 flow [2023-08-04 08:34:03,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-04 08:34:03,999 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-08-04 08:34:03,999 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 357 flow [2023-08-04 08:34:04,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:04,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:04,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:04,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:34:04,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:04,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 181150334, now seen corresponding path program 1 times [2023-08-04 08:34:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:04,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37196383] [2023-08-04 08:34:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:34:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37196383] [2023-08-04 08:34:04,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37196383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658348282] [2023-08-04 08:34:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:04,405 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:04,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:34:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:04,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:34:04,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:34:05,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:34:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658348282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:05,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:05,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 08:34:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714911846] [2023-08-04 08:34:05,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:34:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:34:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:34:05,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-08-04 08:34:05,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 113.36363636363636) internal successors, (1247), 11 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:05,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:05,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-08-04 08:34:05,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:06,917 INFO L124 PetriNetUnfolderBase]: 2957/6053 cut-off events. [2023-08-04 08:34:06,917 INFO L125 PetriNetUnfolderBase]: For 6733/6733 co-relation queries the response was YES. [2023-08-04 08:34:06,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18413 conditions, 6053 events. 2957/6053 cut-off events. For 6733/6733 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 45267 event pairs, 415 based on Foata normal form. 1/6003 useless extension candidates. Maximal degree in co-relation 18394. Up to 3837 conditions per place. [2023-08-04 08:34:06,929 INFO L140 encePairwiseOnDemand]: 241/249 looper letters, 0 selfloop transitions, 0 changer transitions 158/158 dead transitions. [2023-08-04 08:34:06,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 158 transitions, 1095 flow [2023-08-04 08:34:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:34:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:34:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 874 transitions. [2023-08-04 08:34:06,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014343086632244 [2023-08-04 08:34:06,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 874 transitions. [2023-08-04 08:34:06,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 874 transitions. [2023-08-04 08:34:06,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:06,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 874 transitions. [2023-08-04 08:34:06,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:06,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:06,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:06,933 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 357 flow. Second operand 7 states and 874 transitions. [2023-08-04 08:34:06,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 158 transitions, 1095 flow [2023-08-04 08:34:06,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 158 transitions, 1073 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:06,982 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-04 08:34:06,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-04 08:34:06,982 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-08-04 08:34:06,982 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-04 08:34:06,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 113.36363636363636) internal successors, (1247), 11 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:06,983 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:34:06,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:07,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:07,183 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:07,185 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:34:07,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 153 transitions, 396 flow [2023-08-04 08:34:07,340 INFO L124 PetriNetUnfolderBase]: 834/3928 cut-off events. [2023-08-04 08:34:07,340 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:34:07,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4602 conditions, 3928 events. 834/3928 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 31320 event pairs, 11 based on Foata normal form. 0/3338 useless extension candidates. Maximal degree in co-relation 2317. Up to 192 conditions per place. [2023-08-04 08:34:07,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 153 transitions, 396 flow [2023-08-04 08:34:07,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 88 transitions, 212 flow [2023-08-04 08:34:07,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:34:07,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 88 transitions, 212 flow [2023-08-04 08:34:07,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 88 transitions, 212 flow [2023-08-04 08:34:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 88 transitions, 212 flow [2023-08-04 08:34:07,363 INFO L124 PetriNetUnfolderBase]: 12/467 cut-off events. [2023-08-04 08:34:07,363 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 08:34:07,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 467 events. 12/467 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2107 event pairs, 0 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 387. Up to 27 conditions per place. [2023-08-04 08:34:07,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-04 08:34:08,753 INFO L134 LiptonReduction]: Checked pairs total: 1351 [2023-08-04 08:34:08,753 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-04 08:34:08,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:34:08,754 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;@668d51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:34:08,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:34:08,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:34:08,757 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2023-08-04 08:34:08,757 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 08:34:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:08,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:08,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:08,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash 481039537, now seen corresponding path program 1 times [2023-08-04 08:34:08,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561962382] [2023-08-04 08:34:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:08,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:08,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:08,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561962382] [2023-08-04 08:34:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561962382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:08,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:34:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854812274] [2023-08-04 08:34:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:34:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 219 [2023-08-04 08:34:08,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:08,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 219 [2023-08-04 08:34:08,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:08,887 INFO L124 PetriNetUnfolderBase]: 1323/2188 cut-off events. [2023-08-04 08:34:08,888 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-08-04 08:34:08,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 2188 events. 1323/2188 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10914 event pairs, 982 based on Foata normal form. 0/2139 useless extension candidates. Maximal degree in co-relation 2029. Up to 2006 conditions per place. [2023-08-04 08:34:08,894 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 08:34:08,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 140 flow [2023-08-04 08:34:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 08:34:08,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707762557077626 [2023-08-04 08:34:08,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 08:34:08,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 08:34:08,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:08,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 08:34:08,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,897 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 88 flow. Second operand 3 states and 375 transitions. [2023-08-04 08:34:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 140 flow [2023-08-04 08:34:08,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 29 transitions, 134 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 08:34:08,898 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 94 flow [2023-08-04 08:34:08,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-04 08:34:08,899 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:34:08,899 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 94 flow [2023-08-04 08:34:08,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:08,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:34:08,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 08:34:08,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:08,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 27358981, now seen corresponding path program 1 times [2023-08-04 08:34:08,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:08,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686012794] [2023-08-04 08:34:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:08,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:34:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686012794] [2023-08-04 08:34:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686012794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095819270] [2023-08-04 08:34:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:08,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:08,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:08,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:34:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:08,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:34:08,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:34:09,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095819270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:09,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:09,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:34:09,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805701258] [2023-08-04 08:34:09,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:09,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:09,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:34:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-04 08:34:09,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:09,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-04 08:34:09,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:09,131 INFO L124 PetriNetUnfolderBase]: 1319/2178 cut-off events. [2023-08-04 08:34:09,132 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:34:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 2178 events. 1319/2178 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10844 event pairs, 756 based on Foata normal form. 4/2139 useless extension candidates. Maximal degree in co-relation 2658. Up to 1985 conditions per place. [2023-08-04 08:34:09,139 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 22 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-04 08:34:09,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 154 flow [2023-08-04 08:34:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:34:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:34:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-08-04 08:34:09,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554337899543379 [2023-08-04 08:34:09,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-08-04 08:34:09,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-08-04 08:34:09,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:09,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-08-04 08:34:09,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,142 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,142 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 94 flow. Second operand 5 states and 607 transitions. [2023-08-04 08:34:09,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 154 flow [2023-08-04 08:34:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:09,143 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 108 flow [2023-08-04 08:34:09,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 08:34:09,144 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 08:34:09,144 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 108 flow [2023-08-04 08:34:09,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:09,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:09,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-04 08:34:09,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 08:34:09,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:09,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash -591916341, now seen corresponding path program 1 times [2023-08-04 08:34:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879866387] [2023-08-04 08:34:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:34:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:09,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879866387] [2023-08-04 08:34:09,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879866387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:09,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241335990] [2023-08-04 08:34:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:09,368 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:09,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:34:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:09,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:09,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:34:09,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241335990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:09,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:09,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:34:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116014127] [2023-08-04 08:34:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:09,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:09,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 219 [2023-08-04 08:34:09,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:09,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 219 [2023-08-04 08:34:09,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:09,651 INFO L124 PetriNetUnfolderBase]: 1212/2017 cut-off events. [2023-08-04 08:34:09,651 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-04 08:34:09,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4307 conditions, 2017 events. 1212/2017 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9824 event pairs, 910 based on Foata normal form. 0/1980 useless extension candidates. Maximal degree in co-relation 1896. Up to 1773 conditions per place. [2023-08-04 08:34:09,657 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 08:34:09,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 172 flow [2023-08-04 08:34:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-04 08:34:09,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573820395738204 [2023-08-04 08:34:09,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-04 08:34:09,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-04 08:34:09,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:09,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-04 08:34:09,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,662 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 108 flow. Second operand 3 states and 377 transitions. [2023-08-04 08:34:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 172 flow [2023-08-04 08:34:09,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 165 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:09,663 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 116 flow [2023-08-04 08:34:09,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 08:34:09,664 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-04 08:34:09,664 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 116 flow [2023-08-04 08:34:09,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:09,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:09,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:09,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:09,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 08:34:09,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:09,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 387685897, now seen corresponding path program 1 times [2023-08-04 08:34:09,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:09,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862713973] [2023-08-04 08:34:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:09,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:09,893 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 08:34:09,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862713973] [2023-08-04 08:34:09,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862713973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898631068] [2023-08-04 08:34:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:09,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:09,909 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:09,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:34:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:09,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:09,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:09,988 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 08:34:09,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:09,996 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 08:34:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898631068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:09,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:34:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735617683] [2023-08-04 08:34:09,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:10,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-04 08:34:10,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:10,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-04 08:34:10,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:10,110 INFO L124 PetriNetUnfolderBase]: 876/1419 cut-off events. [2023-08-04 08:34:10,110 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-04 08:34:10,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3087 conditions, 1419 events. 876/1419 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6171 event pairs, 476 based on Foata normal form. 2/1412 useless extension candidates. Maximal degree in co-relation 1717. Up to 1269 conditions per place. [2023-08-04 08:34:10,114 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:34:10,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2023-08-04 08:34:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 08:34:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593607305936074 [2023-08-04 08:34:10,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 08:34:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 08:34:10,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:10,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 08:34:10,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,117 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 116 flow. Second operand 4 states and 490 transitions. [2023-08-04 08:34:10,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2023-08-04 08:34:10,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 31 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:10,118 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 111 flow [2023-08-04 08:34:10,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-08-04 08:34:10,118 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:34:10,118 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 111 flow [2023-08-04 08:34:10,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:10,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:10,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:10,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-04 08:34:10,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:10,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 317778498, now seen corresponding path program 1 times [2023-08-04 08:34:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:10,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480666055] [2023-08-04 08:34:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,373 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 08:34:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480666055] [2023-08-04 08:34:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480666055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006719325] [2023-08-04 08:34:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:10,375 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:10,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:34:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:34:10,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:10,462 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 08:34:10,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:10,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006719325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:10,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:10,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:34:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694176988] [2023-08-04 08:34:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:34:10,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-04 08:34:10,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:10,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-04 08:34:10,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:10,592 INFO L124 PetriNetUnfolderBase]: 844/1371 cut-off events. [2023-08-04 08:34:10,592 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-04 08:34:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2982 conditions, 1371 events. 844/1371 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5880 event pairs, 176 based on Foata normal form. 16/1386 useless extension candidates. Maximal degree in co-relation 1655. Up to 1100 conditions per place. [2023-08-04 08:34:10,596 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-04 08:34:10,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 197 flow [2023-08-04 08:34:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:34:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:34:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-04 08:34:10,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598173515981735 [2023-08-04 08:34:10,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-04 08:34:10,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-04 08:34:10,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:10,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-04 08:34:10,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,600 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 111 flow. Second operand 5 states and 613 transitions. [2023-08-04 08:34:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 197 flow [2023-08-04 08:34:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:10,601 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 121 flow [2023-08-04 08:34:10,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2023-08-04 08:34:10,601 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-04 08:34:10,602 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 121 flow [2023-08-04 08:34:10,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:10,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:10,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:10,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:10,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1849804159, now seen corresponding path program 1 times [2023-08-04 08:34:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100182162] [2023-08-04 08:34:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:34:10,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:10,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100182162] [2023-08-04 08:34:10,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100182162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:10,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913151463] [2023-08-04 08:34:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:10,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:10,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:10,849 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:10,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:34:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:10,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:10,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:34:10,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:34:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913151463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:10,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:34:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959881662] [2023-08-04 08:34:10,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:10,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-04 08:34:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-04 08:34:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:11,067 INFO L124 PetriNetUnfolderBase]: 632/1015 cut-off events. [2023-08-04 08:34:11,068 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:34:11,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1015 events. 632/1015 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3911 event pairs, 344 based on Foata normal form. 8/1022 useless extension candidates. Maximal degree in co-relation 1257. Up to 809 conditions per place. [2023-08-04 08:34:11,072 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 27 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-04 08:34:11,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 191 flow [2023-08-04 08:34:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2023-08-04 08:34:11,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5639269406392694 [2023-08-04 08:34:11,073 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2023-08-04 08:34:11,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2023-08-04 08:34:11,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:11,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2023-08-04 08:34:11,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,076 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 121 flow. Second operand 4 states and 494 transitions. [2023-08-04 08:34:11,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 191 flow [2023-08-04 08:34:11,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:34:11,077 INFO L231 Difference]: Finished difference. Result has 50 places, 26 transitions, 114 flow [2023-08-04 08:34:11,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=26} [2023-08-04 08:34:11,078 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-08-04 08:34:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 26 transitions, 114 flow [2023-08-04 08:34:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:11,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:11,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-04 08:34:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:11,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:34:11,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash 582782715, now seen corresponding path program 1 times [2023-08-04 08:34:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:11,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454976212] [2023-08-04 08:34:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:34:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454976212] [2023-08-04 08:34:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454976212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:34:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:34:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185166716] [2023-08-04 08:34:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:34:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:34:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:34:11,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 219 [2023-08-04 08:34:11,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 26 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:11,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 219 [2023-08-04 08:34:11,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:11,407 INFO L124 PetriNetUnfolderBase]: 440/727 cut-off events. [2023-08-04 08:34:11,407 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:34:11,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 727 events. 440/727 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2565 event pairs, 104 based on Foata normal form. 64/790 useless extension candidates. Maximal degree in co-relation 1131. Up to 336 conditions per place. [2023-08-04 08:34:11,408 INFO L140 encePairwiseOnDemand]: 217/219 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 08:34:11,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 190 flow [2023-08-04 08:34:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-04 08:34:11,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684931506849316 [2023-08-04 08:34:11,410 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-04 08:34:11,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-04 08:34:11,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:11,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-04 08:34:11,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,413 INFO L175 Difference]: Start difference. First operand has 50 places, 26 transitions, 114 flow. Second operand 4 states and 498 transitions. [2023-08-04 08:34:11,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 190 flow [2023-08-04 08:34:11,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:34:11,414 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-04 08:34:11,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-04 08:34:11,415 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:34:11,415 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-04 08:34:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:11,415 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:34:11,415 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:34:11,415 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:34:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-04 08:34:11,415 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:11,416 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:34:11,416 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:34:11,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:34:11,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:34:11 BasicIcfg [2023-08-04 08:34:11,422 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:34:11,422 INFO L158 Benchmark]: Toolchain (without parser) took 50444.19ms. Allocated memory was 545.3MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 503.9MB in the beginning and 4.2GB in the end (delta: -3.7GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-04 08:34:11,422 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 348.1MB. Free memory is still 297.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:34:11,422 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.37ms. Allocated memory is still 545.3MB. Free memory was 503.5MB in the beginning and 492.3MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:34:11,422 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.20ms. Allocated memory is still 545.3MB. Free memory was 492.3MB in the beginning and 490.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:34:11,423 INFO L158 Benchmark]: Boogie Preprocessor took 32.39ms. Allocated memory is still 545.3MB. Free memory was 490.6MB in the beginning and 489.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:34:11,423 INFO L158 Benchmark]: RCFGBuilder took 284.62ms. Allocated memory is still 545.3MB. Free memory was 489.2MB in the beginning and 474.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 08:34:11,424 INFO L158 Benchmark]: TraceAbstraction took 49911.44ms. Allocated memory was 545.3MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 473.8MB in the beginning and 4.2GB in the end (delta: -3.7GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-04 08:34:11,425 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 348.1MB. Free memory is still 297.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 188.37ms. Allocated memory is still 545.3MB. Free memory was 503.5MB in the beginning and 492.3MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.20ms. Allocated memory is still 545.3MB. Free memory was 492.3MB in the beginning and 490.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.39ms. Allocated memory is still 545.3MB. Free memory was 490.6MB in the beginning and 489.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 284.62ms. Allocated memory is still 545.3MB. Free memory was 489.2MB in the beginning and 474.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 49911.44ms. Allocated memory was 545.3MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 473.8MB in the beginning and 4.2GB in the end (delta: -3.7GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 110 PlacesBefore, 35 PlacesAfterwards, 119 TransitionsBefore, 37 TransitionsAfterwards, 1224 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 7 ChoiceCompositions, 93 TotalNumberOfCompositions, 3408 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2725, independent: 2680, independent conditional: 0, independent unconditional: 2680, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 718, independent: 703, independent conditional: 0, independent unconditional: 703, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2725, independent: 1977, independent conditional: 0, independent unconditional: 1977, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 718, unknown conditional: 0, unknown unconditional: 718] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 69, Positive conditional cache size: 0, Positive unconditional cache size: 69, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 81 PlacesBefore, 24 PlacesAfterwards, 76 TransitionsBefore, 17 TransitionsAfterwards, 486 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 63 TotalNumberOfCompositions, 351 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 351, independent: 351, independent conditional: 0, independent unconditional: 351, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 235, independent: 235, independent conditional: 0, independent unconditional: 235, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 351, independent: 116, independent conditional: 0, independent unconditional: 116, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 235, unknown conditional: 0, unknown unconditional: 235] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 128 PlacesBefore, 50 PlacesAfterwards, 140 TransitionsBefore, 55 TransitionsAfterwards, 2988 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 7 ChoiceCompositions, 96 TotalNumberOfCompositions, 11304 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9143, independent: 9039, independent conditional: 0, independent unconditional: 9039, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1730, independent: 1712, independent conditional: 0, independent unconditional: 1712, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9143, independent: 7327, independent conditional: 0, independent unconditional: 7327, dependent: 86, dependent conditional: 0, dependent unconditional: 86, unknown: 1730, unknown conditional: 0, unknown unconditional: 1730] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 197, Positive conditional cache size: 0, Positive unconditional cache size: 197, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 99 PlacesBefore, 39 PlacesAfterwards, 88 TransitionsBefore, 26 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 66 TotalNumberOfCompositions, 1351 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1216, independent: 1207, independent conditional: 0, independent unconditional: 1207, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 638, independent: 633, independent conditional: 0, independent unconditional: 633, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1216, independent: 574, independent conditional: 0, independent unconditional: 574, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 638, unknown conditional: 0, unknown unconditional: 638] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 137 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 495 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 17 mSDtfsCounter, 495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 344 SizeOfPredicates, 0 NumberOfNonLiveVariables, 789 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 141 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.2s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 27.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1270 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1162 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39 mSDsCounter, 137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2881 IncrementalHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 137 mSolverCounterUnsat, 23 mSDtfsCounter, 2881 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 936 GetRequests, 854 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=14, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1042 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1395 ConstructedInterpolants, 0 QuantifiedInterpolants, 10302 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2365 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 36 InterpolantComputations, 7 PerfectInterpolantSequences, 541/585 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 141 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 215 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 150 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 457 IncrementalHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 17 mSDtfsCounter, 457 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 624 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 124/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:34:11,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...