/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-match-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:24:18,995 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:24:19,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:24:19,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:24:19,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:24:19,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:24:19,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:24:19,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:24:19,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:24:19,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:24:19,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:24:19,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:24:19,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:24:19,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:24:19,110 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:24:19,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:24:19,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:24:19,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:24:19,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:24:19,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:24:19,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:24:19,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:24:19,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:24:19,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:24:19,113 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:24:19,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:24:19,113 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:24:19,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:24:19,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:24:19,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:24:19,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:24:19,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:24:19,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:24:19,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:24:19,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:24:19,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:24:19,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:24:19,117 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:24:19,117 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:24:19,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:24:19,117 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:24:19,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:24:19,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:24:19,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:24:19,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:24:19,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:24:19,383 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:24:19,384 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c [2023-08-04 08:24:20,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:24:20,726 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:24:20,727 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c [2023-08-04 08:24:20,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9734ddc5b/95b6553b04e2467da4bedb324b9bd389/FLAG87dbd5169 [2023-08-04 08:24:20,745 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9734ddc5b/95b6553b04e2467da4bedb324b9bd389 [2023-08-04 08:24:20,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:24:20,748 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:24:20,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:24:20,749 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:24:20,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:24:20,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:24:20" (1/1) ... [2023-08-04 08:24:20,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123efd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:20, skipping insertion in model container [2023-08-04 08:24:20,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:24:20" (1/1) ... [2023-08-04 08:24:20,785 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:24:20,964 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c[3197,3210] [2023-08-04 08:24:20,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:24:20,975 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:24:20,998 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-match-trans.wvr_bound2.c[3197,3210] [2023-08-04 08:24:21,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:24:21,013 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:24:21,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21 WrapperNode [2023-08-04 08:24:21,014 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:24:21,015 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:24:21,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:24:21,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:24:21,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,051 INFO L138 Inliner]: procedures = 23, calls = 33, calls flagged for inlining = 11, calls inlined = 21, statements flattened = 259 [2023-08-04 08:24:21,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:24:21,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:24:21,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:24:21,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:24:21,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,080 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:24:21,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:24:21,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:24:21,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:24:21,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (1/1) ... [2023-08-04 08:24:21,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:24:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:21,142 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 08:24:21,159 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 08:24:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:24:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:24:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:24:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:24:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:24:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:24:21,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:24:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:24:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:24:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:24:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:24:21,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:24:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:24:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:24:21,181 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 08:24:21,277 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:24:21,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:24:21,583 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:24:21,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:24:21,598 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:24:21,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:24:21 BoogieIcfgContainer [2023-08-04 08:24:21,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:24:21,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:24:21,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:24:21,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:24:21,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:24:20" (1/3) ... [2023-08-04 08:24:21,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b70ec9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:24:21, skipping insertion in model container [2023-08-04 08:24:21,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:24:21" (2/3) ... [2023-08-04 08:24:21,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b70ec9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:24:21, skipping insertion in model container [2023-08-04 08:24:21,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:24:21" (3/3) ... [2023-08-04 08:24:21,607 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-match-trans.wvr_bound2.c [2023-08-04 08:24:21,614 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:24:21,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:24:21,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:24:21,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:24:21,837 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:24:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,155 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 08:24:22,155 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:24:22,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 08:24:22,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:24:22,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:22,370 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 08:24:22,371 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:24:22,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 08:24:22,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 34968 [2023-08-04 08:24:30,332 INFO L134 LiptonReduction]: Checked pairs total: 36735 [2023-08-04 08:24:30,333 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-04 08:24:30,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:24:30,351 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;@47188683, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:24:30,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:24:30,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:24:30,356 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:24:30,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:24:30,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:30,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:30,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:30,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash 185047812, now seen corresponding path program 1 times [2023-08-04 08:24:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:30,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421003861] [2023-08-04 08:24:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:30,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:30,600 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 08:24:30,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:30,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421003861] [2023-08-04 08:24:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421003861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:24:30,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:24:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182389605] [2023-08-04 08:24:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:30,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:24:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:30,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:30,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:30,843 INFO L124 PetriNetUnfolderBase]: 372/765 cut-off events. [2023-08-04 08:24:30,844 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 08:24:30,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 765 events. 372/765 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3893 event pairs, 188 based on Foata normal form. 0/658 useless extension candidates. Maximal degree in co-relation 1116. Up to 687 conditions per place. [2023-08-04 08:24:30,848 INFO L140 encePairwiseOnDemand]: 611/615 looper letters, 33 selfloop transitions, 2 changer transitions 4/42 dead transitions. [2023-08-04 08:24:30,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 198 flow [2023-08-04 08:24:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-08-04 08:24:30,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44498644986449865 [2023-08-04 08:24:30,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-08-04 08:24:30,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-08-04 08:24:30,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:30,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-08-04 08:24:30,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:30,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:30,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:30,890 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 124 flow. Second operand 3 states and 821 transitions. [2023-08-04 08:24:30,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 198 flow [2023-08-04 08:24:30,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:24:30,897 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 118 flow [2023-08-04 08:24:30,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-04 08:24:30,902 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:24:30,902 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 118 flow [2023-08-04 08:24:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:30,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:30,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:30,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:24:30,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:30,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash 609253539, now seen corresponding path program 1 times [2023-08-04 08:24:30,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:30,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204419242] [2023-08-04 08:24:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:30,993 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 08:24:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204419242] [2023-08-04 08:24:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204419242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870669172] [2023-08-04 08:24:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:30,997 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 08:24:31,038 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 08:24:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:31,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:31,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:31,106 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 08:24:31,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870669172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:31,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:31,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712610311] [2023-08-04 08:24:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:31,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:31,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:31,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:31,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:31,285 INFO L124 PetriNetUnfolderBase]: 354/713 cut-off events. [2023-08-04 08:24:31,285 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 08:24:31,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 713 events. 354/713 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3309 event pairs, 189 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 1452. Up to 645 conditions per place. [2023-08-04 08:24:31,292 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 34 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:24:31,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 198 flow [2023-08-04 08:24:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-08-04 08:24:31,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44498644986449865 [2023-08-04 08:24:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-08-04 08:24:31,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-08-04 08:24:31,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:31,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-08-04 08:24:31,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,304 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 118 flow. Second operand 3 states and 821 transitions. [2023-08-04 08:24:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 198 flow [2023-08-04 08:24:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:24:31,306 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 110 flow [2023-08-04 08:24:31,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:31,307 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-04 08:24:31,307 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 110 flow [2023-08-04 08:24:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:31,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:31,319 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 08:24:31,513 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 08:24:31,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:31,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash -797061794, now seen corresponding path program 1 times [2023-08-04 08:24:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410291265] [2023-08-04 08:24:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:31,575 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 08:24:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410291265] [2023-08-04 08:24:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410291265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536302272] [2023-08-04 08:24:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:31,577 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 08:24:31,607 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 08:24:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:31,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:31,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:31,669 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 08:24:31,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536302272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:31,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93883770] [2023-08-04 08:24:31,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:31,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:31,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:31,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:31,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:31,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:31,812 INFO L124 PetriNetUnfolderBase]: 350/709 cut-off events. [2023-08-04 08:24:31,812 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:24:31,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 709 events. 350/709 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3026 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 08:24:31,815 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 08:24:31,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 194 flow [2023-08-04 08:24:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-08-04 08:24:31,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44552845528455287 [2023-08-04 08:24:31,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-08-04 08:24:31,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-08-04 08:24:31,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:31,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-08-04 08:24:31,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,824 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 110 flow. Second operand 3 states and 822 transitions. [2023-08-04 08:24:31,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 194 flow [2023-08-04 08:24:31,825 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 08:24:31,826 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 114 flow [2023-08-04 08:24:31,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:31,827 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-04 08:24:31,827 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 114 flow [2023-08-04 08:24:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:31,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:31,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:31,835 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 08:24:32,032 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 08:24:32,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:32,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash -415583484, now seen corresponding path program 1 times [2023-08-04 08:24:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108078394] [2023-08-04 08:24:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:32,126 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 08:24:32,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108078394] [2023-08-04 08:24:32,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108078394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801317441] [2023-08-04 08:24:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:32,128 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 08:24:32,130 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 08:24:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:32,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:32,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:32,214 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 08:24:32,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:32,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801317441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:32,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:32,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:32,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287711785] [2023-08-04 08:24:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:32,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:32,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:32,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:32,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:32,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:32,348 INFO L124 PetriNetUnfolderBase]: 242/513 cut-off events. [2023-08-04 08:24:32,348 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:24:32,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 513 events. 242/513 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1992 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 08:24:32,351 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 08:24:32,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 220 flow [2023-08-04 08:24:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2023-08-04 08:24:32,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44769647696476966 [2023-08-04 08:24:32,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:32,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,369 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 114 flow. Second operand 3 states and 826 transitions. [2023-08-04 08:24:32,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 220 flow [2023-08-04 08:24:32,371 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 08:24:32,373 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 122 flow [2023-08-04 08:24:32,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:32,374 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-04 08:24:32,374 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 122 flow [2023-08-04 08:24:32,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:32,375 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 08:24:32,383 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 08:24:32,580 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 08:24:32,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:32,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -221825018, now seen corresponding path program 1 times [2023-08-04 08:24:32,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:32,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412676934] [2023-08-04 08:24:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:32,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:32,687 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 08:24:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412676934] [2023-08-04 08:24:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412676934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588628296] [2023-08-04 08:24:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:32,697 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 08:24:32,700 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 08:24:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:32,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:32,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:32,787 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 08:24:32,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:32,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588628296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:32,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:32,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:32,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461553655] [2023-08-04 08:24:32,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:32,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:32,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:32,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:32,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:32,912 INFO L124 PetriNetUnfolderBase]: 193/432 cut-off events. [2023-08-04 08:24:32,913 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 08:24:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 432 events. 193/432 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1573 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 08:24:32,915 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:24:32,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 230 flow [2023-08-04 08:24:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 826 transitions. [2023-08-04 08:24:32,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44769647696476966 [2023-08-04 08:24:32,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:32,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 826 transitions. [2023-08-04 08:24:32,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,924 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 122 flow. Second operand 3 states and 826 transitions. [2023-08-04 08:24:32,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 230 flow [2023-08-04 08:24:32,926 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 08:24:32,927 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 132 flow [2023-08-04 08:24:32,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:32,929 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 08:24:32,929 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 132 flow [2023-08-04 08:24:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:32,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:32,930 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 08:24:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:33,135 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 08:24:33,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:33,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1201580562, now seen corresponding path program 1 times [2023-08-04 08:24:33,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:33,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540859320] [2023-08-04 08:24:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:33,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:33,229 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 08:24:33,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:33,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540859320] [2023-08-04 08:24:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540859320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441862277] [2023-08-04 08:24:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:33,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:33,231 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 08:24:33,256 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 08:24:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:33,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:33,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:33,334 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 08:24:33,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441862277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:33,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:33,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:24:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188383726] [2023-08-04 08:24:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:33,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 615 [2023-08-04 08:24:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 615 [2023-08-04 08:24:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:33,490 INFO L124 PetriNetUnfolderBase]: 189/424 cut-off events. [2023-08-04 08:24:33,490 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-04 08:24:33,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 424 events. 189/424 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1528 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 08:24:33,492 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 35 selfloop transitions, 2 changer transitions 3/43 dead transitions. [2023-08-04 08:24:33,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 220 flow [2023-08-04 08:24:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-08-04 08:24:33,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44552845528455287 [2023-08-04 08:24:33,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-08-04 08:24:33,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-08-04 08:24:33,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:33,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-08-04 08:24:33,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 615.0) internal successors, (2460), 4 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,501 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 132 flow. Second operand 3 states and 822 transitions. [2023-08-04 08:24:33,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 220 flow [2023-08-04 08:24:33,503 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 08:24:33,503 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 130 flow [2023-08-04 08:24:33,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:33,504 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:24:33,504 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 130 flow [2023-08-04 08:24:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:33,505 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 08:24:33,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:24:33,710 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 08:24:33,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:33,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash -455558947, now seen corresponding path program 1 times [2023-08-04 08:24:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686136543] [2023-08-04 08:24:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:33,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:33,782 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 08:24:33,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686136543] [2023-08-04 08:24:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686136543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261048502] [2023-08-04 08:24:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:33,784 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 08:24:33,787 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 08:24:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:33,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:24:33,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:33,912 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 08:24:33,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:24:33,930 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 08:24:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261048502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:24:33,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:24:33,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:24:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411370542] [2023-08-04 08:24:33,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:24:33,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:24:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:24:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:33,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 615 [2023-08-04 08:24:33,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 266.4) internal successors, (1332), 5 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:33,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 615 [2023-08-04 08:24:33,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:33,958 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:24:33,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:24:33,959 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 3. Compared 8 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 08:24:33,959 INFO L140 encePairwiseOnDemand]: 612/615 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:24:33,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:24:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:24:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:24:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1048 transitions. [2023-08-04 08:24:33,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42601626016260163 [2023-08-04 08:24:33,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1048 transitions. [2023-08-04 08:24:33,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1048 transitions. [2023-08-04 08:24:33,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:33,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1048 transitions. [2023-08-04 08:24:33,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 615.0) internal successors, (3075), 5 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 615.0) internal successors, (3075), 5 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,969 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 130 flow. Second operand 4 states and 1048 transitions. [2023-08-04 08:24:33,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:24:33,970 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 08:24:33,970 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:24:33,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=615, 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 08:24:33,971 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -21 predicate places. [2023-08-04 08:24:33,971 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:24:33,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 266.4) internal successors, (1332), 5 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:33,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:24:33,983 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 08:24:34,180 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 08:24:34,180 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:34,182 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:24:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,283 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 08:24:34,283 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:24:34,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 08:24:34,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:24:34,298 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 297 transitions, 636 flow [2023-08-04 08:24:34,395 INFO L124 PetriNetUnfolderBase]: 110/913 cut-off events. [2023-08-04 08:24:34,395 INFO L125 PetriNetUnfolderBase]: For 36/72 co-relation queries the response was YES. [2023-08-04 08:24:34,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 110/913 cut-off events. For 36/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5268 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 469. Up to 16 conditions per place. [2023-08-04 08:24:34,427 INFO L119 LiptonReduction]: Number of co-enabled transitions 34968 [2023-08-04 08:24:41,937 INFO L134 LiptonReduction]: Checked pairs total: 36500 [2023-08-04 08:24:41,937 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-04 08:24:41,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:24:41,942 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;@47188683, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:24:41,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:24:41,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:24:41,945 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:24:41,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:24:41,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:41,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:24:41,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:24:41,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1428716085, now seen corresponding path program 1 times [2023-08-04 08:24:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836376764] [2023-08-04 08:24:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:41,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:24:41,967 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:24:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:24:41,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:24:41,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:24:41,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:24:41,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:24:41,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:24:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:24:41,997 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:24:41,998 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:24:41,998 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:24:41,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:24:42,059 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:24:42,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:43,219 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 08:24:43,219 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:24:43,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44521 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 08:24:43,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:43,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:43,374 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:24:43,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:43,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:43,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:24:44,300 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 08:24:44,300 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:24:44,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44521 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 08:24:44,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 115620 [2023-08-04 08:24:55,264 INFO L134 LiptonReduction]: Checked pairs total: 131579 [2023-08-04 08:24:55,264 INFO L136 LiptonReduction]: Total number of compositions: 505 [2023-08-04 08:24:55,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:24:55,266 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;@47188683, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:24:55,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:24:55,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:24:55,269 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 08:24:55,269 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:24:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:55,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:55,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash 464873542, now seen corresponding path program 1 times [2023-08-04 08:24:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591452326] [2023-08-04 08:24:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:55,301 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 08:24:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:55,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591452326] [2023-08-04 08:24:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591452326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:55,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:24:55,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:24:55,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796417027] [2023-08-04 08:24:55,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:55,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:24:55,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:24:55,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 392.3333333333333) internal successors, (1177), 3 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:55,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:55,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:24:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:24:58,247 INFO L124 PetriNetUnfolderBase]: 19931/29965 cut-off events. [2023-08-04 08:24:58,248 INFO L125 PetriNetUnfolderBase]: For 7142/7142 co-relation queries the response was YES. [2023-08-04 08:24:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 29965 events. 19931/29965 cut-off events. For 7142/7142 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 188221 event pairs, 13302 based on Foata normal form. 0/27397 useless extension candidates. Maximal degree in co-relation 25306. Up to 28006 conditions per place. [2023-08-04 08:24:58,408 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 50 selfloop transitions, 2 changer transitions 3/61 dead transitions. [2023-08-04 08:24:58,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 316 flow [2023-08-04 08:24:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:24:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:24:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1224 transitions. [2023-08-04 08:24:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272251308900524 [2023-08-04 08:24:58,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1224 transitions. [2023-08-04 08:24:58,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1224 transitions. [2023-08-04 08:24:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:24:58,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1224 transitions. [2023-08-04 08:24:58,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.0) internal successors, (1224), 3 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,421 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 3 states and 1224 transitions. [2023-08-04 08:24:58,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 316 flow [2023-08-04 08:24:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:24:58,431 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 200 flow [2023-08-04 08:24:58,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-04 08:24:58,432 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 08:24:58,432 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 200 flow [2023-08-04 08:24:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 392.3333333333333) internal successors, (1177), 3 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:24:58,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:24:58,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:24:58,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:24:58,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:24:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1858279499, now seen corresponding path program 1 times [2023-08-04 08:24:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:24:58,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219348049] [2023-08-04 08:24:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:58,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:24:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:58,474 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 08:24:58,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:24:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219348049] [2023-08-04 08:24:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219348049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:24:58,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728824159] [2023-08-04 08:24:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:24:58,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:24:58,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:24:58,476 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 08:24:58,479 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 08:24:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:24:58,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:24:58,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:24:58,569 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 08:24:58,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:24:58,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728824159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:24:58,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:24:58,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:24:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098426885] [2023-08-04 08:24:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:24:58,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:24:58,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:24:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:24:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:24:58,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:24:58,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 393.3333333333333) internal successors, (1180), 3 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:24:58,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:24:58,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:24:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:01,283 INFO L124 PetriNetUnfolderBase]: 19717/29517 cut-off events. [2023-08-04 08:25:01,283 INFO L125 PetriNetUnfolderBase]: For 6665/6665 co-relation queries the response was YES. [2023-08-04 08:25:01,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61935 conditions, 29517 events. 19717/29517 cut-off events. For 6665/6665 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 184892 event pairs, 13229 based on Foata normal form. 0/27029 useless extension candidates. Maximal degree in co-relation 61905. Up to 27632 conditions per place. [2023-08-04 08:25:01,407 INFO L140 encePairwiseOnDemand]: 952/955 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 08:25:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 320 flow [2023-08-04 08:25:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1225 transitions. [2023-08-04 08:25:01,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42757417102966844 [2023-08-04 08:25:01,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1225 transitions. [2023-08-04 08:25:01,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1225 transitions. [2023-08-04 08:25:01,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:01,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1225 transitions. [2023-08-04 08:25:01,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:01,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:01,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:01,419 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 200 flow. Second operand 3 states and 1225 transitions. [2023-08-04 08:25:01,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 320 flow [2023-08-04 08:25:01,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:25:01,439 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 198 flow [2023-08-04 08:25:01,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:01,441 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-04 08:25:01,441 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 198 flow [2023-08-04 08:25:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 393.3333333333333) internal successors, (1180), 3 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:01,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:01,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:01,452 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 08:25:01,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:01,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:01,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1496568672, now seen corresponding path program 1 times [2023-08-04 08:25:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:01,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961795911] [2023-08-04 08:25:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:01,682 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 08:25:01,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:01,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961795911] [2023-08-04 08:25:01,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961795911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:01,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072330556] [2023-08-04 08:25:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:01,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:01,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:01,684 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 08:25:01,687 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 08:25:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:01,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:01,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:01,773 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 08:25:01,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:01,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072330556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:01,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:01,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:25:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375540120] [2023-08-04 08:25:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:01,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:01,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:01,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:25:01,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:01,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:01,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:25:01,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:04,660 INFO L124 PetriNetUnfolderBase]: 19681/29763 cut-off events. [2023-08-04 08:25:04,660 INFO L125 PetriNetUnfolderBase]: For 2898/2898 co-relation queries the response was YES. [2023-08-04 08:25:04,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 29763 events. 19681/29763 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 190281 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 08:25:04,775 INFO L140 encePairwiseOnDemand]: 952/955 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 08:25:04,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 328 flow [2023-08-04 08:25:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1227 transitions. [2023-08-04 08:25:04,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282722513089005 [2023-08-04 08:25:04,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1227 transitions. [2023-08-04 08:25:04,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1227 transitions. [2023-08-04 08:25:04,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:04,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1227 transitions. [2023-08-04 08:25:04,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:04,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:04,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:04,787 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 198 flow. Second operand 3 states and 1227 transitions. [2023-08-04 08:25:04,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 328 flow [2023-08-04 08:25:04,790 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 08:25:04,791 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 208 flow [2023-08-04 08:25:04,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:04,791 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-04 08:25:04,791 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 208 flow [2023-08-04 08:25:04,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:04,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:04,792 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 08:25:04,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:04,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:25:04,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:04,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -331537895, now seen corresponding path program 1 times [2023-08-04 08:25:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920523340] [2023-08-04 08:25:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:05,033 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 08:25:05,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920523340] [2023-08-04 08:25:05,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920523340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923239515] [2023-08-04 08:25:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:05,035 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 08:25:05,037 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 08:25:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:05,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:05,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:05,126 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 08:25:05,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923239515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:05,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:25:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116622749] [2023-08-04 08:25:05,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:05,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:05,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:25:05,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:05,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:05,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:25:05,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:07,983 INFO L124 PetriNetUnfolderBase]: 18785/28651 cut-off events. [2023-08-04 08:25:07,983 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:25:08,021 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 183831 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 08:25:08,081 INFO L140 encePairwiseOnDemand]: 952/955 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 08:25:08,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 383 flow [2023-08-04 08:25:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 08:25:08,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307155322862129 [2023-08-04 08:25:08,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 08:25:08,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 08:25:08,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:08,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 08:25:08,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:08,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:08,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:08,092 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 208 flow. Second operand 3 states and 1234 transitions. [2023-08-04 08:25:08,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 383 flow [2023-08-04 08:25:08,096 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 08:25:08,097 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 218 flow [2023-08-04 08:25:08,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:08,097 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 08:25:08,098 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 218 flow [2023-08-04 08:25:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:08,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:08,098 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 08:25:08,109 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 08:25:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:08,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:08,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash 341534196, now seen corresponding path program 1 times [2023-08-04 08:25:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:08,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613503954] [2023-08-04 08:25:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:08,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:08,342 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 08:25:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613503954] [2023-08-04 08:25:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613503954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694126837] [2023-08-04 08:25:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:08,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:08,344 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 08:25:08,355 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 08:25:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:08,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:08,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:08,448 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 08:25:08,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:08,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694126837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:08,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:08,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:25:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343049993] [2023-08-04 08:25:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:08,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:08,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:08,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:25:08,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 396.6666666666667) internal successors, (1190), 3 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:08,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:08,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:25:08,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:11,303 INFO L124 PetriNetUnfolderBase]: 18576/28798 cut-off events. [2023-08-04 08:25:11,303 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:25:11,344 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 186654 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 08:25:11,409 INFO L140 encePairwiseOnDemand]: 952/955 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:25:11,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 395 flow [2023-08-04 08:25:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 08:25:11,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307155322862129 [2023-08-04 08:25:11,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 08:25:11,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 08:25:11,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:11,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 08:25:11,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:11,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:11,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:11,420 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 218 flow. Second operand 3 states and 1234 transitions. [2023-08-04 08:25:11,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 395 flow [2023-08-04 08:25:11,440 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 08:25:11,441 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 228 flow [2023-08-04 08:25:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:11,441 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 08:25:11,442 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 228 flow [2023-08-04 08:25:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 396.6666666666667) internal successors, (1190), 3 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:11,442 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 08:25:11,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 08:25:11,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:25:11,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:11,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2142011212, now seen corresponding path program 1 times [2023-08-04 08:25:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668314096] [2023-08-04 08:25:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:11,704 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 08:25:11,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668314096] [2023-08-04 08:25:11,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668314096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950706666] [2023-08-04 08:25:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:11,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:11,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:11,707 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 08:25:11,710 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 08:25:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:11,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:11,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:11,825 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 08:25:11,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:11,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950706666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:11,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:11,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:25:11,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015615526] [2023-08-04 08:25:11,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:11,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 955 [2023-08-04 08:25:11,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:11,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:11,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 955 [2023-08-04 08:25:11,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:14,760 INFO L124 PetriNetUnfolderBase]: 18847/29441 cut-off events. [2023-08-04 08:25:14,760 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:25:14,824 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 191057 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 08:25:14,900 INFO L140 encePairwiseOnDemand]: 952/955 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:25:14,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 407 flow [2023-08-04 08:25:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1234 transitions. [2023-08-04 08:25:14,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307155322862129 [2023-08-04 08:25:14,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1234 transitions. [2023-08-04 08:25:14,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1234 transitions. [2023-08-04 08:25:14,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:14,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1234 transitions. [2023-08-04 08:25:14,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 411.3333333333333) internal successors, (1234), 3 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:14,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:14,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 955.0) internal successors, (3820), 4 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:14,912 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 228 flow. Second operand 3 states and 1234 transitions. [2023-08-04 08:25:14,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 407 flow [2023-08-04 08:25:15,041 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 08:25:15,042 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 238 flow [2023-08-04 08:25:15,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:15,043 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 08:25:15,043 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 238 flow [2023-08-04 08:25:15,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:15,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:15,043 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 08:25:15,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:25:15,247 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,SelfDestructingSolverStorable13 [2023-08-04 08:25:15,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:15,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 181694586, now seen corresponding path program 1 times [2023-08-04 08:25:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349649700] [2023-08-04 08:25:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:15,302 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 08:25:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349649700] [2023-08-04 08:25:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349649700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242682282] [2023-08-04 08:25:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:15,304 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 08:25:15,330 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 08:25:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:15,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:15,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:15,443 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 08:25:15,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:15,460 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 08:25:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242682282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:15,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:15,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:25:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612357495] [2023-08-04 08:25:15,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:15,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 395.4) internal successors, (1977), 5 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:18,467 INFO L124 PetriNetUnfolderBase]: 17691/27603 cut-off events. [2023-08-04 08:25:18,467 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:25:18,519 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 179966 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 08:25:18,596 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 08:25:18,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 368 flow [2023-08-04 08:25:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1612 transitions. [2023-08-04 08:25:18,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42198952879581153 [2023-08-04 08:25:18,601 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1612 transitions. [2023-08-04 08:25:18,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1612 transitions. [2023-08-04 08:25:18,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:18,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1612 transitions. [2023-08-04 08:25:18,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:18,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:18,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:18,610 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 238 flow. Second operand 4 states and 1612 transitions. [2023-08-04 08:25:18,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 368 flow [2023-08-04 08:25:18,882 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 08:25:18,883 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 250 flow [2023-08-04 08:25:18,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:18,884 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 08:25:18,884 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 250 flow [2023-08-04 08:25:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.4) internal successors, (1977), 5 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:18,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:18,885 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 08:25:18,889 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 08:25:19,085 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,SelfDestructingSolverStorable14 [2023-08-04 08:25:19,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:19,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1913934970, now seen corresponding path program 1 times [2023-08-04 08:25:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162709517] [2023-08-04 08:25:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:19,147 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 08:25:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162709517] [2023-08-04 08:25:19,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162709517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291219479] [2023-08-04 08:25:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:19,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:19,149 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 08:25:19,172 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 08:25:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:19,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:19,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:19,279 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 08:25:19,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:19,292 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 08:25:19,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291219479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:19,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:25:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676958377] [2023-08-04 08:25:19,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:19,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:19,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:19,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:19,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:19,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:19,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:19,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:22,148 INFO L124 PetriNetUnfolderBase]: 16839/26275 cut-off events. [2023-08-04 08:25:22,149 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:25:22,198 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 171205 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 08:25:22,256 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 08:25:22,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 396 flow [2023-08-04 08:25:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1616 transitions. [2023-08-04 08:25:22,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42303664921465967 [2023-08-04 08:25:22,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1616 transitions. [2023-08-04 08:25:22,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1616 transitions. [2023-08-04 08:25:22,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:22,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1616 transitions. [2023-08-04 08:25:22,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 404.0) internal successors, (1616), 4 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:22,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:22,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:22,269 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 250 flow. Second operand 4 states and 1616 transitions. [2023-08-04 08:25:22,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 396 flow [2023-08-04 08:25:22,422 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 08:25:22,423 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 254 flow [2023-08-04 08:25:22,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:22,423 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 08:25:22,423 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 254 flow [2023-08-04 08:25:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.6) internal successors, (1978), 5 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:22,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:22,424 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 08:25:22,431 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 08:25:22,624 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,SelfDestructingSolverStorable15 [2023-08-04 08:25:22,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:22,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2018314070, now seen corresponding path program 1 times [2023-08-04 08:25:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171779679] [2023-08-04 08:25:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:22,723 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 08:25:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171779679] [2023-08-04 08:25:22,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171779679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181676973] [2023-08-04 08:25:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:22,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:22,725 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 08:25:22,728 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 08:25:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:22,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:22,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:22,863 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 08:25:22,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:22,877 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 08:25:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181676973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:22,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:25:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537644521] [2023-08-04 08:25:22,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:22,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:22,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:22,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 395.8) internal successors, (1979), 5 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:22,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:22,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:22,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:25,502 INFO L124 PetriNetUnfolderBase]: 16407/25603 cut-off events. [2023-08-04 08:25:25,503 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:25:25,538 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 165236 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 08:25:25,593 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 64 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 08:25:25,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 416 flow [2023-08-04 08:25:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1620 transitions. [2023-08-04 08:25:25,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408376963350786 [2023-08-04 08:25:25,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1620 transitions. [2023-08-04 08:25:25,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1620 transitions. [2023-08-04 08:25:25,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:25,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1620 transitions. [2023-08-04 08:25:25,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:25,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:25,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:25,608 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 254 flow. Second operand 4 states and 1620 transitions. [2023-08-04 08:25:25,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 416 flow [2023-08-04 08:25:25,788 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 08:25:25,789 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 258 flow [2023-08-04 08:25:25,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:25,790 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 08:25:25,790 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 258 flow [2023-08-04 08:25:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 395.8) internal successors, (1979), 5 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:25,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:25,791 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 08:25:25,801 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 08:25:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:26,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:26,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 233010952, now seen corresponding path program 1 times [2023-08-04 08:25:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:26,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142918340] [2023-08-04 08:25:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:26,099 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 08:25:26,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142918340] [2023-08-04 08:25:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142918340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596830948] [2023-08-04 08:25:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:26,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:26,101 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 08:25:26,104 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 08:25:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:26,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:26,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:26,250 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 08:25:26,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:26,263 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 08:25:26,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596830948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:26,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:26,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:25:26,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787911751] [2023-08-04 08:25:26,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:26,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:26,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:26,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:26,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:27,942 INFO L124 PetriNetUnfolderBase]: 10315/16383 cut-off events. [2023-08-04 08:25:27,942 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:25:27,973 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 98904 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 08:25:28,010 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 71 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 08:25:28,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 461 flow [2023-08-04 08:25:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 08:25:28,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259162303664921 [2023-08-04 08:25:28,014 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 08:25:28,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 08:25:28,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:28,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 08:25:28,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,022 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,022 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 258 flow. Second operand 4 states and 1627 transitions. [2023-08-04 08:25:28,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 461 flow [2023-08-04 08:25:28,116 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 08:25:28,117 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 268 flow [2023-08-04 08:25:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:28,117 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-04 08:25:28,117 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 268 flow [2023-08-04 08:25:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:28,119 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 08:25:28,126 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 08:25:28,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:25:28,325 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:28,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash 880219107, now seen corresponding path program 1 times [2023-08-04 08:25:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507103444] [2023-08-04 08:25:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:28,388 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 08:25:28,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:28,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507103444] [2023-08-04 08:25:28,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507103444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:28,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759897768] [2023-08-04 08:25:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:28,390 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 08:25:28,415 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 08:25:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:28,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:28,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:28,524 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 08:25:28,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:28,535 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 08:25:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759897768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:28,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:25:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834216028] [2023-08-04 08:25:28,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:28,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:28,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 396.4) internal successors, (1982), 5 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:28,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:28,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:29,908 INFO L124 PetriNetUnfolderBase]: 9415/14912 cut-off events. [2023-08-04 08:25:29,909 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:25:29,929 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 87973 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 08:25:29,957 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 08:25:29,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 472 flow [2023-08-04 08:25:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 08:25:29,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259162303664921 [2023-08-04 08:25:29,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 08:25:29,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 08:25:29,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:29,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 08:25:29,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:29,971 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 268 flow. Second operand 4 states and 1627 transitions. [2023-08-04 08:25:29,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 472 flow [2023-08-04 08:25:30,049 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 08:25:30,050 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 284 flow [2023-08-04 08:25:30,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:30,051 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-08-04 08:25:30,051 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 284 flow [2023-08-04 08:25:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.4) internal successors, (1982), 5 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:30,052 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 08:25:30,058 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 08:25:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:30,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:30,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1334939939, now seen corresponding path program 1 times [2023-08-04 08:25:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:30,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161383676] [2023-08-04 08:25:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,326 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 08:25:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161383676] [2023-08-04 08:25:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161383676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030995224] [2023-08-04 08:25:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:30,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:30,328 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 08:25:30,337 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 08:25:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:30,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:25:30,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:30,483 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 08:25:30,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:30,499 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 08:25:30,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030995224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:30,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:30,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:25:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836776991] [2023-08-04 08:25:30,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:25:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:25:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:30,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 955 [2023-08-04 08:25:30,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:30,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:30,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 955 [2023-08-04 08:25:30,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:31,833 INFO L124 PetriNetUnfolderBase]: 9409/14895 cut-off events. [2023-08-04 08:25:31,833 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:25:31,860 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 87825 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 08:25:31,882 INFO L140 encePairwiseOnDemand]: 951/955 looper letters, 71 selfloop transitions, 3 changer transitions 3/83 dead transitions. [2023-08-04 08:25:31,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 490 flow [2023-08-04 08:25:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:25:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:25:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1627 transitions. [2023-08-04 08:25:31,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259162303664921 [2023-08-04 08:25:31,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1627 transitions. [2023-08-04 08:25:31,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1627 transitions. [2023-08-04 08:25:31,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:31,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1627 transitions. [2023-08-04 08:25:31,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 406.75) internal successors, (1627), 4 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:31,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:31,892 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 955.0) internal successors, (4775), 5 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:31,892 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 284 flow. Second operand 4 states and 1627 transitions. [2023-08-04 08:25:31,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 490 flow [2023-08-04 08:25:32,074 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 08:25:32,075 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 282 flow [2023-08-04 08:25:32,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, 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 08:25:32,076 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-08-04 08:25:32,076 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 282 flow [2023-08-04 08:25:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:32,077 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 08:25:32,081 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 08:25:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:32,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:32,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1217361252, now seen corresponding path program 1 times [2023-08-04 08:25:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317255219] [2023-08-04 08:25:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:33,118 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 08:25:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317255219] [2023-08-04 08:25:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317255219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627041672] [2023-08-04 08:25:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:33,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:33,121 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 08:25:33,146 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 08:25:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:33,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 08:25:33,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:36,244 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 08:25:36,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:37,214 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 08:25:37,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627041672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:37,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:37,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 08:25:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374558834] [2023-08-04 08:25:37,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:37,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:25:37,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:25:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:25:37,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:25:37,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 282 flow. Second operand has 11 states, 11 states have (on average 376.0) internal successors, (4136), 11 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:37,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:37,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:25:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:40,394 INFO L124 PetriNetUnfolderBase]: 14536/22947 cut-off events. [2023-08-04 08:25:40,394 INFO L125 PetriNetUnfolderBase]: For 13625/13625 co-relation queries the response was YES. [2023-08-04 08:25:40,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56454 conditions, 22947 events. 14536/22947 cut-off events. For 13625/13625 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 149942 event pairs, 2518 based on Foata normal form. 1/22869 useless extension candidates. Maximal degree in co-relation 56039. Up to 9029 conditions per place. [2023-08-04 08:25:40,579 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 216 selfloop transitions, 29 changer transitions 1/252 dead transitions. [2023-08-04 08:25:40,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 252 transitions, 1676 flow [2023-08-04 08:25:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:25:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:25:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3523 transitions. [2023-08-04 08:25:40,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098894706224549 [2023-08-04 08:25:40,587 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3523 transitions. [2023-08-04 08:25:40,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3523 transitions. [2023-08-04 08:25:40,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:40,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3523 transitions. [2023-08-04 08:25:40,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 391.44444444444446) internal successors, (3523), 9 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:40,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:40,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:40,596 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 282 flow. Second operand 9 states and 3523 transitions. [2023-08-04 08:25:40,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 252 transitions, 1676 flow [2023-08-04 08:25:40,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 252 transitions, 1630 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 08:25:40,955 INFO L231 Difference]: Finished difference. Result has 86 places, 91 transitions, 447 flow [2023-08-04 08:25:40,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=447, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2023-08-04 08:25:40,955 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-04 08:25:40,955 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 447 flow [2023-08-04 08:25:40,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 376.0) internal successors, (4136), 11 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:40,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:40,956 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 08:25:40,962 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 08:25:41,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:41,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:41,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash -950147012, now seen corresponding path program 1 times [2023-08-04 08:25:41,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:41,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726884124] [2023-08-04 08:25:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 08:25:41,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:41,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726884124] [2023-08-04 08:25:41,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726884124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:41,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756807417] [2023-08-04 08:25:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:41,821 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 08:25:41,847 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 08:25:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:41,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 08:25:41,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 08:25:44,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 08:25:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756807417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:45,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:45,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 08:25:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352512215] [2023-08-04 08:25:45,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:45,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:25:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:25:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:25:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:25:45,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 447 flow. Second operand has 11 states, 11 states have (on average 376.54545454545456) internal successors, (4142), 11 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:45,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:45,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:25:45,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:50,204 INFO L124 PetriNetUnfolderBase]: 21992/34808 cut-off events. [2023-08-04 08:25:50,205 INFO L125 PetriNetUnfolderBase]: For 56947/56947 co-relation queries the response was YES. [2023-08-04 08:25:50,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117521 conditions, 34808 events. 21992/34808 cut-off events. For 56947/56947 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 249188 event pairs, 2098 based on Foata normal form. 1/34626 useless extension candidates. Maximal degree in co-relation 117387. Up to 14922 conditions per place. [2023-08-04 08:25:50,454 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 200 selfloop transitions, 35 changer transitions 1/242 dead transitions. [2023-08-04 08:25:50,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 242 transitions, 1696 flow [2023-08-04 08:25:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:25:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:25:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3135 transitions. [2023-08-04 08:25:50,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41034031413612565 [2023-08-04 08:25:50,458 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3135 transitions. [2023-08-04 08:25:50,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3135 transitions. [2023-08-04 08:25:50,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:50,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3135 transitions. [2023-08-04 08:25:50,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 391.875) internal successors, (3135), 8 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 955.0) internal successors, (8595), 9 states have internal predecessors, (8595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,467 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 955.0) internal successors, (8595), 9 states have internal predecessors, (8595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,467 INFO L175 Difference]: Start difference. First operand has 86 places, 91 transitions, 447 flow. Second operand 8 states and 3135 transitions. [2023-08-04 08:25:50,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 242 transitions, 1696 flow [2023-08-04 08:25:51,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 242 transitions, 1695 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:51,309 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 630 flow [2023-08-04 08:25:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=630, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2023-08-04 08:25:51,309 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2023-08-04 08:25:51,310 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 630 flow [2023-08-04 08:25:51,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 376.54545454545456) internal successors, (4142), 11 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:51,310 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 08:25:51,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-04 08:25:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:51,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:51,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 709296612, now seen corresponding path program 2 times [2023-08-04 08:25:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:51,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825557275] [2023-08-04 08:25:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:51,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:52,132 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 08:25:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825557275] [2023-08-04 08:25:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825557275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:52,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918965948] [2023-08-04 08:25:52,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:25:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:52,137 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 08:25:52,140 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 08:25:52,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:25:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:25:52,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 08:25:52,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:54,705 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 08:25:54,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:55,256 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 08:25:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918965948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:55,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:55,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-04 08:25:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591920622] [2023-08-04 08:25:55,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:25:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:25:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:25:55,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:25:55,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 630 flow. Second operand has 11 states, 11 states have (on average 374.1818181818182) internal successors, (4116), 11 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:55,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:55,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:25:55,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:00,554 INFO L124 PetriNetUnfolderBase]: 21992/35114 cut-off events. [2023-08-04 08:26:00,554 INFO L125 PetriNetUnfolderBase]: For 128903/128903 co-relation queries the response was YES. [2023-08-04 08:26:00,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143276 conditions, 35114 events. 21992/35114 cut-off events. For 128903/128903 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 251924 event pairs, 2963 based on Foata normal form. 1/35008 useless extension candidates. Maximal degree in co-relation 143127. Up to 18000 conditions per place. [2023-08-04 08:26:00,724 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 225 selfloop transitions, 37 changer transitions 4/272 dead transitions. [2023-08-04 08:26:00,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 272 transitions, 2104 flow [2023-08-04 08:26:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:26:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:26:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3523 transitions. [2023-08-04 08:26:00,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098894706224549 [2023-08-04 08:26:00,730 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3523 transitions. [2023-08-04 08:26:00,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3523 transitions. [2023-08-04 08:26:00,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:00,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3523 transitions. [2023-08-04 08:26:00,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 391.44444444444446) internal successors, (3523), 9 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:00,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:00,741 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:00,742 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 630 flow. Second operand 9 states and 3523 transitions. [2023-08-04 08:26:00,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 272 transitions, 2104 flow [2023-08-04 08:26:02,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 272 transitions, 2058 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-04 08:26:02,288 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 738 flow [2023-08-04 08:26:02,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2023-08-04 08:26:02,288 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2023-08-04 08:26:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 738 flow [2023-08-04 08:26:02,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 374.1818181818182) internal successors, (4116), 11 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:02,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:02,289 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 08:26:02,294 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 08:26:02,489 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,SelfDestructingSolverStorable22 [2023-08-04 08:26:02,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:02,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1679894014, now seen corresponding path program 1 times [2023-08-04 08:26:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457488015] [2023-08-04 08:26:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 08:26:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457488015] [2023-08-04 08:26:03,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457488015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:03,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:03,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:26:03,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156261598] [2023-08-04 08:26:03,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:03,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:26:03,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 738 flow. Second operand has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:03,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:03,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:26:03,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:07,658 INFO L124 PetriNetUnfolderBase]: 21992/34684 cut-off events. [2023-08-04 08:26:07,658 INFO L125 PetriNetUnfolderBase]: For 137261/137261 co-relation queries the response was YES. [2023-08-04 08:26:07,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150920 conditions, 34684 events. 21992/34684 cut-off events. For 137261/137261 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 247400 event pairs, 1725 based on Foata normal form. 1/34486 useless extension candidates. Maximal degree in co-relation 150032. Up to 17734 conditions per place. [2023-08-04 08:26:07,819 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 185 selfloop transitions, 39 changer transitions 11/241 dead transitions. [2023-08-04 08:26:07,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 241 transitions, 1930 flow [2023-08-04 08:26:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:26:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:26:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2370 transitions. [2023-08-04 08:26:07,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41361256544502617 [2023-08-04 08:26:07,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2370 transitions. [2023-08-04 08:26:07,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2370 transitions. [2023-08-04 08:26:07,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:07,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2370 transitions. [2023-08-04 08:26:07,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:07,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 955.0) internal successors, (6685), 7 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:07,828 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 955.0) internal successors, (6685), 7 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:07,828 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 738 flow. Second operand 6 states and 2370 transitions. [2023-08-04 08:26:07,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 241 transitions, 1930 flow [2023-08-04 08:26:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 241 transitions, 1836 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-04 08:26:09,099 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 925 flow [2023-08-04 08:26:09,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=925, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2023-08-04 08:26:09,100 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2023-08-04 08:26:09,100 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 925 flow [2023-08-04 08:26:09,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:09,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:09,101 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 08:26:09,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 08:26:09,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:09,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash -79433428, now seen corresponding path program 1 times [2023-08-04 08:26:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013882237] [2023-08-04 08:26:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:26:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:09,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013882237] [2023-08-04 08:26:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013882237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:09,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797374930] [2023-08-04 08:26:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:09,965 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 08:26:09,996 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 08:26:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:10,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 08:26:10,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:26:12,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 08:26:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797374930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:12,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 08:26:12,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489921200] [2023-08-04 08:26:12,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:12,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 08:26:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 08:26:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-04 08:26:13,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:26:13,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 925 flow. Second operand has 12 states, 12 states have (on average 374.75) internal successors, (4497), 12 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:13,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:13,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:26:13,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:19,138 INFO L124 PetriNetUnfolderBase]: 25078/40289 cut-off events. [2023-08-04 08:26:19,138 INFO L125 PetriNetUnfolderBase]: For 221692/221692 co-relation queries the response was YES. [2023-08-04 08:26:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181493 conditions, 40289 events. 25078/40289 cut-off events. For 221692/221692 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 299550 event pairs, 2531 based on Foata normal form. 1/40119 useless extension candidates. Maximal degree in co-relation 181325. Up to 18997 conditions per place. [2023-08-04 08:26:19,353 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 191 selfloop transitions, 47 changer transitions 37/281 dead transitions. [2023-08-04 08:26:19,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 2333 flow [2023-08-04 08:26:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:26:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:26:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3517 transitions. [2023-08-04 08:26:19,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091913903432228 [2023-08-04 08:26:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3517 transitions. [2023-08-04 08:26:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3517 transitions. [2023-08-04 08:26:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3517 transitions. [2023-08-04 08:26:19,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 390.77777777777777) internal successors, (3517), 9 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,369 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 955.0) internal successors, (9550), 10 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:19,369 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 925 flow. Second operand 9 states and 3517 transitions. [2023-08-04 08:26:19,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 2333 flow [2023-08-04 08:26:22,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 281 transitions, 2322 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:22,764 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 998 flow [2023-08-04 08:26:22,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=112, PETRI_TRANSITIONS=119} [2023-08-04 08:26:22,765 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2023-08-04 08:26:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 998 flow [2023-08-04 08:26:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 374.75) internal successors, (4497), 12 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:22,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:22,765 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 08:26:22,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-04 08:26:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 08:26:22,966 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:22,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash -343954340, now seen corresponding path program 2 times [2023-08-04 08:26:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051652338] [2023-08-04 08:26:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:26:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051652338] [2023-08-04 08:26:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051652338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396725669] [2023-08-04 08:26:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:26:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:23,821 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 08:26:23,828 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 08:26:23,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:26:23,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:26:23,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-04 08:26:23,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:25,890 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 08:26:25,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396725669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:25,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-08-04 08:26:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204664167] [2023-08-04 08:26:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-04 08:26:26,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 955 [2023-08-04 08:26:26,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 119 transitions, 998 flow. Second operand has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:26,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:26,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 955 [2023-08-04 08:26:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:30,890 INFO L124 PetriNetUnfolderBase]: 23096/37952 cut-off events. [2023-08-04 08:26:30,890 INFO L125 PetriNetUnfolderBase]: For 238677/238677 co-relation queries the response was YES. [2023-08-04 08:26:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176087 conditions, 37952 events. 23096/37952 cut-off events. For 238677/238677 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 293951 event pairs, 1841 based on Foata normal form. 1/37699 useless extension candidates. Maximal degree in co-relation 175038. Up to 16684 conditions per place. [2023-08-04 08:26:31,061 INFO L140 encePairwiseOnDemand]: 947/955 looper letters, 0 selfloop transitions, 0 changer transitions 234/234 dead transitions. [2023-08-04 08:26:31,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 234 transitions, 2020 flow [2023-08-04 08:26:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:26:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:26:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2369 transitions. [2023-08-04 08:26:31,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41343804537521817 [2023-08-04 08:26:31,064 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2369 transitions. [2023-08-04 08:26:31,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2369 transitions. [2023-08-04 08:26:31,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:31,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2369 transitions. [2023-08-04 08:26:31,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 394.8333333333333) internal successors, (2369), 6 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:31,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 955.0) internal successors, (6685), 7 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:31,070 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 955.0) internal successors, (6685), 7 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:31,070 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 998 flow. Second operand 6 states and 2369 transitions. [2023-08-04 08:26:31,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 234 transitions, 2020 flow [2023-08-04 08:26:34,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 234 transitions, 1889 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-04 08:26:34,956 INFO L231 Difference]: Finished difference. Result has 104 places, 0 transitions, 0 flow [2023-08-04 08:26:34,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=955, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=104, PETRI_TRANSITIONS=0} [2023-08-04 08:26:34,956 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2023-08-04 08:26:34,956 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 0 transitions, 0 flow [2023-08-04 08:26:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 374.6) internal successors, (1873), 5 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:34,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:26:34,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-04 08:26:35,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 08:26:35,158 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:35,158 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:26:35,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,047 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 08:26:36,047 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:26:36,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44521 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 08:26:36,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:36,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 450 transitions, 990 flow [2023-08-04 08:26:36,955 INFO L124 PetriNetUnfolderBase]: 938/5105 cut-off events. [2023-08-04 08:26:36,955 INFO L125 PetriNetUnfolderBase]: For 602/926 co-relation queries the response was YES. [2023-08-04 08:26:37,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 938/5105 cut-off events. For 602/926 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 44521 event pairs, 26 based on Foata normal form. 0/4291 useless extension candidates. Maximal degree in co-relation 3089. Up to 192 conditions per place. [2023-08-04 08:26:37,305 INFO L119 LiptonReduction]: Number of co-enabled transitions 115620 [2023-08-04 08:26:47,676 INFO L134 LiptonReduction]: Checked pairs total: 133598 [2023-08-04 08:26:47,677 INFO L136 LiptonReduction]: Total number of compositions: 509 [2023-08-04 08:26:47,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:26:47,678 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;@47188683, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:47,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:26:47,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:47,682 INFO L124 PetriNetUnfolderBase]: 6/98 cut-off events. [2023-08-04 08:26:47,682 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:26:47,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:47,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:26:47,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:47,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash 754819369, now seen corresponding path program 1 times [2023-08-04 08:26:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319780833] [2023-08-04 08:26:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:47,713 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 08:26:47,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319780833] [2023-08-04 08:26:47,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319780833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:47,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:47,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:26:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608435212] [2023-08-04 08:26:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:47,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 959 [2023-08-04 08:26:47,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 390.6) internal successors, (1953), 5 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:47,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:47,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 959 [2023-08-04 08:26:47,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:50,282 INFO L124 PetriNetUnfolderBase]: 20172/30607 cut-off events. [2023-08-04 08:26:50,282 INFO L125 PetriNetUnfolderBase]: For 6657/6657 co-relation queries the response was YES. [2023-08-04 08:26:50,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64019 conditions, 30607 events. 20172/30607 cut-off events. For 6657/6657 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 195058 event pairs, 10808 based on Foata normal form. 0/28017 useless extension candidates. Maximal degree in co-relation 25445. Up to 28390 conditions per place. [2023-08-04 08:26:50,346 INFO L140 encePairwiseOnDemand]: 954/959 looper letters, 23 selfloop transitions, 5 changer transitions 31/64 dead transitions. [2023-08-04 08:26:50,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 326 flow [2023-08-04 08:26:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2003 transitions. [2023-08-04 08:26:50,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41772679874869656 [2023-08-04 08:26:50,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2003 transitions. [2023-08-04 08:26:50,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2003 transitions. [2023-08-04 08:26:50,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:50,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2003 transitions. [2023-08-04 08:26:50,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 400.6) internal successors, (2003), 5 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,355 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 5 states and 2003 transitions. [2023-08-04 08:26:50,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 326 flow [2023-08-04 08:26:50,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:50,363 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 105 flow [2023-08-04 08:26:50,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2023-08-04 08:26:50,364 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-04 08:26:50,364 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 105 flow [2023-08-04 08:26:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 390.6) internal successors, (1953), 5 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:50,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 08:26:50,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-04 08:26:50,364 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 08:26:50,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2054851514, now seen corresponding path program 1 times [2023-08-04 08:26:50,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:50,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696736665] [2023-08-04 08:26:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:50,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:26:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696736665] [2023-08-04 08:26:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696736665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:50,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:26:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496676441] [2023-08-04 08:26:50,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 959 [2023-08-04 08:26:50,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:50,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 959 [2023-08-04 08:26:50,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:50,700 INFO L124 PetriNetUnfolderBase]: 1984/3137 cut-off events. [2023-08-04 08:26:50,700 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-08-04 08:26:50,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 3137 events. 1984/3137 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15218 event pairs, 1498 based on Foata normal form. 1/3089 useless extension candidates. Maximal degree in co-relation 2832. Up to 2957 conditions per place. [2023-08-04 08:26:50,710 INFO L140 encePairwiseOnDemand]: 956/959 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 08:26:50,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 08:26:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1195 transitions. [2023-08-04 08:26:50,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153632255822037 [2023-08-04 08:26:50,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1195 transitions. [2023-08-04 08:26:50,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1195 transitions. [2023-08-04 08:26:50,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:50,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1195 transitions. [2023-08-04 08:26:50,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 398.3333333333333) internal successors, (1195), 3 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 959.0) internal successors, (3836), 4 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 959.0) internal successors, (3836), 4 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,715 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 105 flow. Second operand 3 states and 1195 transitions. [2023-08-04 08:26:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 08:26:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:50,716 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 08:26:50,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 08:26:50,716 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-04 08:26:50,716 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 08:26:50,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 392.0) internal successors, (1176), 3 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:50,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 08:26:50,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:50,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash -519793042, now seen corresponding path program 1 times [2023-08-04 08:26:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388508597] [2023-08-04 08:26:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:50,739 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 08:26:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388508597] [2023-08-04 08:26:50,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388508597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:50,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585278135] [2023-08-04 08:26:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:50,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:50,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:50,741 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 08:26:50,757 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 08:26:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:50,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:26:50,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:50,873 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 08:26:50,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:50,882 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 08:26:50,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585278135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:50,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:50,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 08:26:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669350508] [2023-08-04 08:26:50,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:50,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:26:50,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:26:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:26:50,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 959 [2023-08-04 08:26:50,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 391.25) internal successors, (1565), 4 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:50,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:50,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 959 [2023-08-04 08:26:50,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:51,113 INFO L124 PetriNetUnfolderBase]: 1432/2207 cut-off events. [2023-08-04 08:26:51,113 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 08:26:51,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4631 conditions, 2207 events. 1432/2207 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9515 event pairs, 784 based on Foata normal form. 2/2176 useless extension candidates. Maximal degree in co-relation 2626. Up to 2073 conditions per place. [2023-08-04 08:26:51,120 INFO L140 encePairwiseOnDemand]: 956/959 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:26:51,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 08:26:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1583 transitions. [2023-08-04 08:26:51,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126694473409802 [2023-08-04 08:26:51,122 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1583 transitions. [2023-08-04 08:26:51,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1583 transitions. [2023-08-04 08:26:51,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:51,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1583 transitions. [2023-08-04 08:26:51,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 395.75) internal successors, (1583), 4 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 959.0) internal successors, (4795), 5 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 959.0) internal successors, (4795), 5 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,128 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1583 transitions. [2023-08-04 08:26:51,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 08:26:51,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:51,129 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 08:26:51,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 08:26:51,129 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 08:26:51,130 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 08:26:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 391.25) internal successors, (1565), 4 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:51,130 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:51,136 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 08:26:51,336 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 08:26:51,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:51,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1799352513, now seen corresponding path program 1 times [2023-08-04 08:26:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:51,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061053427] [2023-08-04 08:26:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:51,379 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 08:26:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061053427] [2023-08-04 08:26:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061053427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122728590] [2023-08-04 08:26:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:51,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:51,381 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 08:26:51,406 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 08:26:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:51,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:26:51,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:51,520 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 08:26:51,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:51,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122728590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:51,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:51,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:26:51,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863728881] [2023-08-04 08:26:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:51,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:51,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 959 [2023-08-04 08:26:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 959 [2023-08-04 08:26:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:51,822 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 08:26:51,822 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 08:26:51,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9738 event pairs, 344 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 08:26:51,833 INFO L140 encePairwiseOnDemand]: 955/959 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 08:26:51,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 08:26:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1980 transitions. [2023-08-04 08:26:51,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129301355578728 [2023-08-04 08:26:51,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1980 transitions. [2023-08-04 08:26:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1980 transitions. [2023-08-04 08:26:51,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:51,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1980 transitions. [2023-08-04 08:26:51,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,844 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1980 transitions. [2023-08-04 08:26:51,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 08:26:51,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:26:51,846 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 08:26:51,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 08:26:51,848 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 08:26:51,848 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 08:26:51,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 391.6) internal successors, (1958), 5 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:51,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:51,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:51,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:52,055 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 08:26:52,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:52,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash -490588901, now seen corresponding path program 1 times [2023-08-04 08:26:52,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652579601] [2023-08-04 08:26:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:52,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:26:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652579601] [2023-08-04 08:26:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652579601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:52,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795353200] [2023-08-04 08:26:52,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 390 out of 959 [2023-08-04 08:26:52,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 393.6666666666667) internal successors, (1181), 3 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:52,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 390 of 959 [2023-08-04 08:26:52,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:52,358 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 08:26:52,358 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 08:26:52,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8202 event pairs, 992 based on Foata normal form. 4/1970 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 08:26:52,367 INFO L140 encePairwiseOnDemand]: 956/959 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:26:52,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 08:26:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1197 transitions. [2023-08-04 08:26:52,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-08-04 08:26:52,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1197 transitions. [2023-08-04 08:26:52,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1197 transitions. [2023-08-04 08:26:52,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:52,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1197 transitions. [2023-08-04 08:26:52,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 959.0) internal successors, (3836), 4 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 959.0) internal successors, (3836), 4 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,373 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 1197 transitions. [2023-08-04 08:26:52,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 08:26:52,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:52,375 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 08:26:52,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 08:26:52,375 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 08:26:52,375 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 08:26:52,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 393.6666666666667) internal successors, (1181), 3 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:52,376 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:52,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-04 08:26:52,376 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 08:26:52,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash -314682683, now seen corresponding path program 1 times [2023-08-04 08:26:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:52,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846882706] [2023-08-04 08:26:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:52,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:26:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846882706] [2023-08-04 08:26:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846882706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778859814] [2023-08-04 08:26:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:52,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:52,408 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:52,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:26:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:52,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:26:52,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:26:52,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 08:26:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778859814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:52,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:52,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:26:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559794965] [2023-08-04 08:26:52,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 959 [2023-08-04 08:26:52,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:52,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 959 [2023-08-04 08:26:52,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:52,798 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 08:26:52,798 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 08:26:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5344 event pairs, 536 based on Foata normal form. 8/1438 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 08:26:52,803 INFO L140 encePairwiseOnDemand]: 956/959 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 08:26:52,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 08:26:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:26:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:26:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1587 transitions. [2023-08-04 08:26:52,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137122002085506 [2023-08-04 08:26:52,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1587 transitions. [2023-08-04 08:26:52,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1587 transitions. [2023-08-04 08:26:52,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:52,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1587 transitions. [2023-08-04 08:26:52,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 396.75) internal successors, (1587), 4 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 959.0) internal successors, (4795), 5 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,811 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 959.0) internal successors, (4795), 5 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,811 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1587 transitions. [2023-08-04 08:26:52,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 08:26:52,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:52,812 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 08:26:52,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 08:26:52,813 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-04 08:26:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 08:26:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:52,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-04 08:26:53,020 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 08:26:53,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -576891634, now seen corresponding path program 1 times [2023-08-04 08:26:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137241508] [2023-08-04 08:26:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:26:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137241508] [2023-08-04 08:26:53,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137241508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786051458] [2023-08-04 08:26:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:53,059 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:53,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:26:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:53,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:26:53,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:26:53,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:53,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786051458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:53,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:53,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:26:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271315681] [2023-08-04 08:26:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:26:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:26:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:26:53,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 959 [2023-08-04 08:26:53,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:53,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:53,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 959 [2023-08-04 08:26:53,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:53,419 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 08:26:53,419 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 08:26:53,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3987 event pairs, 104 based on Foata normal form. 64/1206 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 08:26:53,422 INFO L140 encePairwiseOnDemand]: 956/959 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 08:26:53,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 08:26:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1984 transitions. [2023-08-04 08:26:53,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137643378519291 [2023-08-04 08:26:53,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1984 transitions. [2023-08-04 08:26:53,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1984 transitions. [2023-08-04 08:26:53,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:53,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1984 transitions. [2023-08-04 08:26:53,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 396.8) internal successors, (1984), 5 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:53,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:53,430 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 959.0) internal successors, (5754), 6 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:53,431 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1984 transitions. [2023-08-04 08:26:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 08:26:53,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:26:53,433 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 08:26:53,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=959, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 08:26:53,433 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 08:26:53,433 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 08:26:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 392.6) internal successors, (1963), 5 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:53,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:26:53,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:26:53,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:26:53,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:53,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-04 08:26:53,641 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:53,641 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:26:53,641 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:26:53,641 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:26:53,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:26:53 BasicIcfg [2023-08-04 08:26:53,646 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:26:53,646 INFO L158 Benchmark]: Toolchain (without parser) took 152898.06ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 449.7MB in the beginning and 10.1GB in the end (delta: -9.6GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-04 08:26:53,647 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 358.6MB. Free memory was 311.6MB in the beginning and 311.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:26:53,651 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.57ms. Allocated memory is still 497.0MB. Free memory was 449.4MB in the beginning and 437.6MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:26:53,651 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.28ms. Allocated memory is still 497.0MB. Free memory was 437.6MB in the beginning and 435.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 08:26:53,652 INFO L158 Benchmark]: Boogie Preprocessor took 30.61ms. Allocated memory is still 497.0MB. Free memory was 435.0MB in the beginning and 432.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:26:53,652 INFO L158 Benchmark]: RCFGBuilder took 516.43ms. Allocated memory is still 497.0MB. Free memory was 432.9MB in the beginning and 410.3MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 08:26:53,653 INFO L158 Benchmark]: TraceAbstraction took 152044.10ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 409.9MB in the beginning and 10.1GB in the end (delta: -9.7GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-04 08:26:53,654 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 358.6MB. Free memory was 311.6MB in the beginning and 311.5MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 264.57ms. Allocated memory is still 497.0MB. Free memory was 449.4MB in the beginning and 437.6MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.28ms. Allocated memory is still 497.0MB. Free memory was 437.6MB in the beginning and 435.0MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.61ms. Allocated memory is still 497.0MB. Free memory was 435.0MB in the beginning and 432.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 516.43ms. Allocated memory is still 497.0MB. Free memory was 432.9MB in the beginning and 410.3MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 152044.10ms. Allocated memory was 497.0MB in the beginning and 13.3GB in the end (delta: 12.8GB). Free memory was 409.9MB in the beginning and 10.1GB in the end (delta: -9.7GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.1s, 276 PlacesBefore, 39 PlacesAfterwards, 297 TransitionsBefore, 41 TransitionsAfterwards, 34968 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 176 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 63 ConcurrentYvCompositions, 19 ChoiceCompositions, 318 TotalNumberOfCompositions, 36735 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 36256, independent: 36220, independent conditional: 0, independent unconditional: 36220, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 20344, independent: 20329, independent conditional: 0, independent unconditional: 20329, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 36256, independent: 15891, independent conditional: 0, independent unconditional: 15891, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 20344, unknown conditional: 0, unknown unconditional: 20344] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 77, Positive conditional cache size: 0, Positive unconditional cache size: 77, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.6s, 276 PlacesBefore, 39 PlacesAfterwards, 297 TransitionsBefore, 41 TransitionsAfterwards, 34968 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 174 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 61 ConcurrentYvCompositions, 19 ChoiceCompositions, 314 TotalNumberOfCompositions, 36500 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 35564, independent: 35524, independent conditional: 0, independent unconditional: 35524, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 20318, independent: 20306, independent conditional: 0, independent unconditional: 20306, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 35564, independent: 15218, independent conditional: 0, independent unconditional: 15218, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 20318, unknown conditional: 0, unknown unconditional: 20318] , Statistics on independence cache: Total cache size (in pairs): 81, Positive cache size: 78, Positive conditional cache size: 0, Positive unconditional cache size: 78, 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: 11.9s, 414 PlacesBefore, 54 PlacesAfterwards, 450 TransitionsBefore, 59 TransitionsAfterwards, 115620 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 297 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 117 ConcurrentYvCompositions, 31 ChoiceCompositions, 505 TotalNumberOfCompositions, 131579 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 127592, independent: 127526, independent conditional: 0, independent unconditional: 127526, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 68760, independent: 68736, independent conditional: 0, independent unconditional: 68736, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 127592, independent: 58790, independent conditional: 0, independent unconditional: 58790, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 68760, unknown conditional: 0, unknown unconditional: 68760] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 211, Positive conditional cache size: 0, Positive unconditional cache size: 211, 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: 11.6s, 414 PlacesBefore, 54 PlacesAfterwards, 450 TransitionsBefore, 59 TransitionsAfterwards, 115620 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 292 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 126 ConcurrentYvCompositions, 31 ChoiceCompositions, 509 TotalNumberOfCompositions, 133598 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 128769, independent: 128694, independent conditional: 0, independent unconditional: 128694, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 69189, independent: 69164, independent conditional: 0, independent unconditional: 69164, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 128769, independent: 59530, independent conditional: 0, independent unconditional: 59530, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 69189, unknown conditional: 0, unknown unconditional: 69189] , Statistics on independence cache: Total cache size (in pairs): 209, Positive cache size: 206, Positive conditional cache size: 0, Positive unconditional cache size: 206, 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 - PositiveResult [Line: 88]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.3s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 128 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 485 IncrementalHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 5 mSDtfsCounter, 485 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, 0.6s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 344 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1029 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, 534 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 113.1s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 74.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2851 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2492 mSDsluCounter, 927 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 829 mSDsCounter, 147 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6825 IncrementalHoareTripleChecker+Invalid, 6972 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 147 mSolverCounterUnsat, 98 mSDtfsCounter, 6825 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1271 GetRequests, 1136 SyntacticMatches, 21 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=998occurred in iteration=17, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 1408 NumberOfCodeBlocks, 1408 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1875 ConstructedInterpolants, 0 QuantifiedInterpolants, 21202 SizeOfPredicates, 186 NumberOfNonLiveVariables, 4600 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 44 InterpolantComputations, 8 PerfectInterpolantSequences, 761/849 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, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 534 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.5s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 12.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 276 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 202 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 513 IncrementalHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 21 mSDtfsCounter, 513 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 406 SizeOfPredicates, 0 NumberOfNonLiveVariables, 638 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 154/170 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 08:26:53,696 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...