/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_11_fmaxsymopt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:54:38,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:54:38,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:54:38,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:54:38,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:54:38,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:54:38,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:54:39,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:54:39,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:54:39,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:54:39,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:54:39,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:54:39,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:54:39,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:54:39,011 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:54:39,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:54:39,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:54:39,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:54:39,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:54:39,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:54:39,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:54:39,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:54:39,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:54:39,014 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:54:39,014 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:54:39,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:54:39,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:54:39,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:54:39,015 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:54:39,016 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:54:39,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:54:39,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:54:39,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:54:39,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:54:39,187 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:54:39,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_11_fmaxsymopt_bound2.i [2023-08-03 21:54:40,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:54:40,325 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:54:40,326 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_11_fmaxsymopt_bound2.i [2023-08-03 21:54:40,336 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8a13183/6d92bbd987f34defa103d68deffdd194/FLAGed94b56fd [2023-08-03 21:54:40,346 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8a13183/6d92bbd987f34defa103d68deffdd194 [2023-08-03 21:54:40,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:54:40,348 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:54:40,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:54:40,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:54:40,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:54:40,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78157e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40, skipping insertion in model container [2023-08-03 21:54:40,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,381 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:54:40,563 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_11_fmaxsymopt_bound2.i[30540,30553] [2023-08-03 21:54:40,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:54:40,574 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:54:40,586 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 21:54:40,587 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 21:54:40,596 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_11_fmaxsymopt_bound2.i[30540,30553] [2023-08-03 21:54:40,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:54:40,623 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:54:40,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40 WrapperNode [2023-08-03 21:54:40,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:54:40,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:54:40,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:54:40,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:54:40,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,650 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2023-08-03 21:54:40,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:54:40,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:54:40,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:54:40,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:54:40,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,657 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:54:40,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:54:40,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:54:40,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:54:40,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (1/1) ... [2023-08-03 21:54:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:54:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:40,709 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) [2023-08-03 21:54:40,713 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 [2023-08-03 21:54:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:54:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 21:54:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 21:54:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:54:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:54:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:54:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:54:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:54:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:54:40,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:54:40,732 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:54:40,816 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:54:40,817 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:54:40,925 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:54:40,949 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:54:40,949 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 21:54:40,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:54:40 BoogieIcfgContainer [2023-08-03 21:54:40,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:54:40,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:54:40,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:54:40,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:54:40,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:54:40" (1/3) ... [2023-08-03 21:54:40,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c105e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:54:40, skipping insertion in model container [2023-08-03 21:54:40,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:54:40" (2/3) ... [2023-08-03 21:54:40,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c105e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:54:40, skipping insertion in model container [2023-08-03 21:54:40,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:54:40" (3/3) ... [2023-08-03 21:54:40,956 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_11_fmaxsymopt_bound2.i [2023-08-03 21:54:40,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:54:40,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:54:40,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:54:40,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:54:41,022 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:54:41,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,075 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-08-03 21:54:41,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:54:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 92 events. 9/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 59. Up to 4 conditions per place. [2023-08-03 21:54:41,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:54:41,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 82 transitions, 169 flow [2023-08-03 21:54:41,132 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-08-03 21:54:41,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:54:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 92 events. 9/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 59. Up to 4 conditions per place. [2023-08-03 21:54:41,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 1408 [2023-08-03 21:54:43,310 INFO L134 LiptonReduction]: Checked pairs total: 1293 [2023-08-03 21:54:43,310 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-03 21:54:43,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:54:43,323 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;@2e2f1144, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:54:43,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:54:43,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:54:43,325 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 21:54:43,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:54:43,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:43,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:54:43,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:54:43,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1184283211, now seen corresponding path program 1 times [2023-08-03 21:54:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:43,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505432815] [2023-08-03 21:54:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:54:43,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:54:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:54:43,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:54:43,476 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:54:43,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:54:43,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:54:43,478 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:54:43,480 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:54:43,480 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:54:43,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:54:43,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:54:43,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,516 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-03 21:54:43,516 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:54:43,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 152 events. 17/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 276 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-03 21:54:43,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:54:43,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:43,553 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-03 21:54:43,553 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:54:43,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 152 events. 17/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 276 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-03 21:54:43,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 6776 [2023-08-03 21:54:45,592 INFO L134 LiptonReduction]: Checked pairs total: 9882 [2023-08-03 21:54:45,593 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-03 21:54:45,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:54:45,595 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;@2e2f1144, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:54:45,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:54:45,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:54:45,598 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-08-03 21:54:45,598 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:54:45,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:45,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:54:45,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:54:45,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 761061786, now seen corresponding path program 1 times [2023-08-03 21:54:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:45,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493154442] [2023-08-03 21:54:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:54:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493154442] [2023-08-03 21:54:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493154442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:54:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167426983] [2023-08-03 21:54:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:45,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:45,720 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) [2023-08-03 21:54:45,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:54:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:45,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:54:45,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:54:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:54:45,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:54:45,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167426983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:45,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:54:45,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:54:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127199461] [2023-08-03 21:54:45,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:45,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:54:45,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 243 [2023-08-03 21:54:45,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 32 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:45,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:45,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 243 [2023-08-03 21:54:45,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:45,914 INFO L124 PetriNetUnfolderBase]: 152/280 cut-off events. [2023-08-03 21:54:45,914 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 21:54:45,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 280 events. 152/280 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 990 event pairs, 0 based on Foata normal form. 34/268 useless extension candidates. Maximal degree in co-relation 116. Up to 161 conditions per place. [2023-08-03 21:54:45,915 INFO L140 encePairwiseOnDemand]: 235/243 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2023-08-03 21:54:45,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 170 flow [2023-08-03 21:54:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:54:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:54:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2023-08-03 21:54:45,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47818930041152263 [2023-08-03 21:54:45,926 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2023-08-03 21:54:45,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2023-08-03 21:54:45,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:45,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2023-08-03 21:54:45,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:45,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:45,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 243.0) internal successors, (1458), 6 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:45,937 INFO L175 Difference]: Start difference. First operand has 29 places, 32 transitions, 76 flow. Second operand 5 states and 581 transitions. [2023-08-03 21:54:45,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 170 flow [2023-08-03 21:54:45,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 169 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:54:45,939 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-03 21:54:45,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-03 21:54:45,942 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 21:54:45,943 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-03 21:54:45,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:45,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:54:45,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:54:46,152 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 [2023-08-03 21:54:46,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:54:46,153 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:54:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,164 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-03 21:54:46,164 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:54:46,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 152 events. 17/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 276 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-03 21:54:46,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:54:46,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,166 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 266 flow [2023-08-03 21:54:46,173 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-03 21:54:46,173 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:54:46,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 152 events. 17/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 276 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-03 21:54:46,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 6776 [2023-08-03 21:54:48,242 INFO L134 LiptonReduction]: Checked pairs total: 9963 [2023-08-03 21:54:48,243 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-03 21:54:48,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:54:48,245 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;@2e2f1144, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:54:48,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:54:48,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:54:48,246 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-03 21:54:48,246 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:54:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1954676281, now seen corresponding path program 1 times [2023-08-03 21:54:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090290012] [2023-08-03 21:54:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:54:48,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090290012] [2023-08-03 21:54:48,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090290012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:48,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:48,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:54:48,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731574780] [2023-08-03 21:54:48,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 21:54:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 21:54:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 21:54:48,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 245 [2023-08-03 21:54:48,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 32 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 245 [2023-08-03 21:54:48,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:48,315 INFO L124 PetriNetUnfolderBase]: 220/448 cut-off events. [2023-08-03 21:54:48,315 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-03 21:54:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 448 events. 220/448 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2003 event pairs, 152 based on Foata normal form. 43/392 useless extension candidates. Maximal degree in co-relation 223. Up to 320 conditions per place. [2023-08-03 21:54:48,317 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 16 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-08-03 21:54:48,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 100 flow [2023-08-03 21:54:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 21:54:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 21:54:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 244 transitions. [2023-08-03 21:54:48,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49795918367346936 [2023-08-03 21:54:48,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 244 transitions. [2023-08-03 21:54:48,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 244 transitions. [2023-08-03 21:54:48,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:48,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 244 transitions. [2023-08-03 21:54:48,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 122.0) internal successors, (244), 2 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,321 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,321 INFO L175 Difference]: Start difference. First operand has 29 places, 32 transitions, 76 flow. Second operand 2 states and 244 transitions. [2023-08-03 21:54:48,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 100 flow [2023-08-03 21:54:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 98 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 21:54:48,322 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 66 flow [2023-08-03 21:54:48,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-03 21:54:48,323 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-03 21:54:48,323 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 66 flow [2023-08-03 21:54:48,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:54:48,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -648782117, now seen corresponding path program 1 times [2023-08-03 21:54:48,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333224426] [2023-08-03 21:54:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:54:48,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333224426] [2023-08-03 21:54:48,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333224426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:48,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:48,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:54:48,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312231668] [2023-08-03 21:54:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:54:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:54:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:54:48,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 245 [2023-08-03 21:54:48,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 245 [2023-08-03 21:54:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:48,428 INFO L124 PetriNetUnfolderBase]: 255/491 cut-off events. [2023-08-03 21:54:48,428 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 21:54:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 491 events. 255/491 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2205 event pairs, 152 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 897. Up to 320 conditions per place. [2023-08-03 21:54:48,430 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 24 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-03 21:54:48,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 38 transitions, 143 flow [2023-08-03 21:54:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:54:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:54:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-03 21:54:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2023-08-03 21:54:48,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-03 21:54:48,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-03 21:54:48,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:48,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-03 21:54:48,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,433 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 66 flow. Second operand 3 states and 345 transitions. [2023-08-03 21:54:48,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 38 transitions, 143 flow [2023-08-03 21:54:48,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 143 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:54:48,436 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 78 flow [2023-08-03 21:54:48,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-03 21:54:48,440 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-08-03 21:54:48,441 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 78 flow [2023-08-03 21:54:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:54:48,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1042944355, now seen corresponding path program 1 times [2023-08-03 21:54:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990910507] [2023-08-03 21:54:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:54:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990910507] [2023-08-03 21:54:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990910507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:48,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:48,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:54:48,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060942552] [2023-08-03 21:54:48,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:54:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:54:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:54:48,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 245 [2023-08-03 21:54:48,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 245 [2023-08-03 21:54:48,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:48,570 INFO L124 PetriNetUnfolderBase]: 428/800 cut-off events. [2023-08-03 21:54:48,570 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-03 21:54:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 800 events. 428/800 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3810 event pairs, 196 based on Foata normal form. 0/625 useless extension candidates. Maximal degree in co-relation 1625. Up to 444 conditions per place. [2023-08-03 21:54:48,573 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 29 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-08-03 21:54:48,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 175 flow [2023-08-03 21:54:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:54:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:54:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-03 21:54:48,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-08-03 21:54:48,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-03 21:54:48,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-03 21:54:48,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:48,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-03 21:54:48,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,577 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 78 flow. Second operand 3 states and 340 transitions. [2023-08-03 21:54:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 175 flow [2023-08-03 21:54:48,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 171 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:54:48,578 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 100 flow [2023-08-03 21:54:48,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-03 21:54:48,578 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-03 21:54:48,579 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 100 flow [2023-08-03 21:54:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:54:48,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1260165945, now seen corresponding path program 1 times [2023-08-03 21:54:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618982015] [2023-08-03 21:54:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:54:48,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618982015] [2023-08-03 21:54:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618982015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:48,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:48,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:54:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426971789] [2023-08-03 21:54:48,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:54:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:54:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:54:48,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 245 [2023-08-03 21:54:48,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 245 [2023-08-03 21:54:48,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:48,691 INFO L124 PetriNetUnfolderBase]: 335/689 cut-off events. [2023-08-03 21:54:48,691 INFO L125 PetriNetUnfolderBase]: For 139/143 co-relation queries the response was YES. [2023-08-03 21:54:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 689 events. 335/689 cut-off events. For 139/143 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3377 event pairs, 213 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 1420. Up to 445 conditions per place. [2023-08-03 21:54:48,694 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-03 21:54:48,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 184 flow [2023-08-03 21:54:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:54:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:54:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-03 21:54:48,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46802721088435373 [2023-08-03 21:54:48,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-03 21:54:48,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-03 21:54:48,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:48,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-03 21:54:48,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,698 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 100 flow. Second operand 3 states and 344 transitions. [2023-08-03 21:54:48,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 184 flow [2023-08-03 21:54:48,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:48,700 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 104 flow [2023-08-03 21:54:48,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-03 21:54:48,701 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-03 21:54:48,701 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 104 flow [2023-08-03 21:54:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:54:48,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2067131259, now seen corresponding path program 1 times [2023-08-03 21:54:48,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045769106] [2023-08-03 21:54:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-03 21:54:48,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045769106] [2023-08-03 21:54:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045769106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:48,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:48,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:54:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415316726] [2023-08-03 21:54:48,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:54:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:54:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:54:48,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 245 [2023-08-03 21:54:48,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 245 [2023-08-03 21:54:48,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:48,827 INFO L124 PetriNetUnfolderBase]: 580/954 cut-off events. [2023-08-03 21:54:48,827 INFO L125 PetriNetUnfolderBase]: For 249/253 co-relation queries the response was YES. [2023-08-03 21:54:48,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 954 events. 580/954 cut-off events. For 249/253 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4111 event pairs, 262 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 2282. Up to 566 conditions per place. [2023-08-03 21:54:48,831 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 30 selfloop transitions, 4 changer transitions 3/44 dead transitions. [2023-08-03 21:54:48,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 44 transitions, 212 flow [2023-08-03 21:54:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:54:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:54:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-03 21:54:48,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46122448979591835 [2023-08-03 21:54:48,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-03 21:54:48,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-03 21:54:48,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:48,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-03 21:54:48,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,834 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 104 flow. Second operand 3 states and 339 transitions. [2023-08-03 21:54:48,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 44 transitions, 212 flow [2023-08-03 21:54:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:54:48,836 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 122 flow [2023-08-03 21:54:48,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-03 21:54:48,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-08-03 21:54:48,837 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 122 flow [2023-08-03 21:54:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:48,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:48,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:54:48,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:48,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1412286596, now seen corresponding path program 1 times [2023-08-03 21:54:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239358573] [2023-08-03 21:54:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:54:48,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:48,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239358573] [2023-08-03 21:54:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239358573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:54:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784137192] [2023-08-03 21:54:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:48,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:48,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:48,882 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) [2023-08-03 21:54:48,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:54:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:48,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:54:48,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:54:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:54:48,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:54:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:54:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784137192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:54:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:54:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:54:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70379157] [2023-08-03 21:54:48,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:54:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:54:48,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 245 [2023-08-03 21:54:48,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:48,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:48,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 245 [2023-08-03 21:54:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:49,065 INFO L124 PetriNetUnfolderBase]: 395/743 cut-off events. [2023-08-03 21:54:49,066 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-08-03 21:54:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 743 events. 395/743 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3522 event pairs, 207 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 1842. Up to 475 conditions per place. [2023-08-03 21:54:49,069 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 34 selfloop transitions, 3 changer transitions 2/53 dead transitions. [2023-08-03 21:54:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 270 flow [2023-08-03 21:54:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:54:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:54:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-08-03 21:54:49,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663265306122449 [2023-08-03 21:54:49,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-08-03 21:54:49,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-08-03 21:54:49,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:49,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-08-03 21:54:49,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 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) [2023-08-03 21:54:49,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 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) [2023-08-03 21:54:49,073 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 122 flow. Second operand 4 states and 457 transitions. [2023-08-03 21:54:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 270 flow [2023-08-03 21:54:49,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:49,075 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 130 flow [2023-08-03 21:54:49,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-03 21:54:49,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-03 21:54:49,076 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 130 flow [2023-08-03 21:54:49,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:49,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:49,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:54:49,281 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,SelfDestructingSolverStorable7 [2023-08-03 21:54:49,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:49,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:49,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1168507434, now seen corresponding path program 2 times [2023-08-03 21:54:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:49,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109514170] [2023-08-03 21:54:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 21:54:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:49,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109514170] [2023-08-03 21:54:49,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109514170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:54:49,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346141255] [2023-08-03 21:54:49,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:54:49,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:49,358 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) [2023-08-03 21:54:49,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:54:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 21:54:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:54:49,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:54:49,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:54:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:54:49,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:54:49,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346141255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:49,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:54:49,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-08-03 21:54:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066709240] [2023-08-03 21:54:49,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:49,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:49,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:54:49,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 245 [2023-08-03 21:54:49,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:49,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 245 [2023-08-03 21:54:49,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:49,606 INFO L124 PetriNetUnfolderBase]: 745/1249 cut-off events. [2023-08-03 21:54:49,607 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2023-08-03 21:54:49,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3361 conditions, 1249 events. 745/1249 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5776 event pairs, 345 based on Foata normal form. 12/1071 useless extension candidates. Maximal degree in co-relation 3350. Up to 709 conditions per place. [2023-08-03 21:54:49,611 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 34 selfloop transitions, 5 changer transitions 15/58 dead transitions. [2023-08-03 21:54:49,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 311 flow [2023-08-03 21:54:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:54:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:54:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 525 transitions. [2023-08-03 21:54:49,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-03 21:54:49,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 525 transitions. [2023-08-03 21:54:49,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 525 transitions. [2023-08-03 21:54:49,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:49,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 525 transitions. [2023-08-03 21:54:49,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,615 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 130 flow. Second operand 5 states and 525 transitions. [2023-08-03 21:54:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 311 flow [2023-08-03 21:54:49,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 303 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:49,617 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 141 flow [2023-08-03 21:54:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-03 21:54:49,618 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-08-03 21:54:49,618 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 141 flow [2023-08-03 21:54:49,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:49,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:49,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:54:49,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:49,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:49,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1708281686, now seen corresponding path program 3 times [2023-08-03 21:54:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004971841] [2023-08-03 21:54:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 21:54:49,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004971841] [2023-08-03 21:54:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004971841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:54:49,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240763542] [2023-08-03 21:54:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:54:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:49,875 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) [2023-08-03 21:54:49,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:54:49,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-03 21:54:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:54:49,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:54:49,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:54:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:54:49,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:54:49,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240763542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:49,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:54:49,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-08-03 21:54:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269548701] [2023-08-03 21:54:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:49,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:54:49,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 245 [2023-08-03 21:54:49,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:49,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:49,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 245 [2023-08-03 21:54:49,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:50,116 INFO L124 PetriNetUnfolderBase]: 732/1240 cut-off events. [2023-08-03 21:54:50,116 INFO L125 PetriNetUnfolderBase]: For 884/884 co-relation queries the response was YES. [2023-08-03 21:54:50,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1240 events. 732/1240 cut-off events. For 884/884 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5644 event pairs, 514 based on Foata normal form. 12/1061 useless extension candidates. Maximal degree in co-relation 3368. Up to 1014 conditions per place. [2023-08-03 21:54:50,120 INFO L140 encePairwiseOnDemand]: 238/245 looper letters, 37 selfloop transitions, 5 changer transitions 12/58 dead transitions. [2023-08-03 21:54:50,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 336 flow [2023-08-03 21:54:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:54:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:54:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 524 transitions. [2023-08-03 21:54:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42775510204081635 [2023-08-03 21:54:50,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 524 transitions. [2023-08-03 21:54:50,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 524 transitions. [2023-08-03 21:54:50,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:50,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 524 transitions. [2023-08-03 21:54:50,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,124 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,124 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 141 flow. Second operand 5 states and 524 transitions. [2023-08-03 21:54:50,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 336 flow [2023-08-03 21:54:50,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 327 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:50,127 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 155 flow [2023-08-03 21:54:50,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2023-08-03 21:54:50,127 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-08-03 21:54:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 155 flow [2023-08-03 21:54:50,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:50,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:50,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:54:50,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:50,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:50,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 415830534, now seen corresponding path program 1 times [2023-08-03 21:54:50,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:50,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716768651] [2023-08-03 21:54:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:50,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 21:54:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716768651] [2023-08-03 21:54:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716768651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:54:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053041325] [2023-08-03 21:54:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:54:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:54:50,369 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) [2023-08-03 21:54:50,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:54:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:50,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:54:50,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:54:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 21:54:50,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:54:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 21:54:50,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053041325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:54:50,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:54:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:54:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498840170] [2023-08-03 21:54:50,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:54:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:54:50,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 245 [2023-08-03 21:54:50,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:50,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 245 [2023-08-03 21:54:50,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:50,525 INFO L124 PetriNetUnfolderBase]: 347/695 cut-off events. [2023-08-03 21:54:50,525 INFO L125 PetriNetUnfolderBase]: For 444/444 co-relation queries the response was YES. [2023-08-03 21:54:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917 conditions, 695 events. 347/695 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3167 event pairs, 213 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 1902. Up to 441 conditions per place. [2023-08-03 21:54:50,528 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 34 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 21:54:50,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 289 flow [2023-08-03 21:54:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:54:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:54:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-03 21:54:50,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602040816326531 [2023-08-03 21:54:50,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-03 21:54:50,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-03 21:54:50,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:50,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-03 21:54:50,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 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) [2023-08-03 21:54:50,532 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 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) [2023-08-03 21:54:50,532 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 155 flow. Second operand 4 states and 451 transitions. [2023-08-03 21:54:50,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 289 flow [2023-08-03 21:54:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 266 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-03 21:54:50,535 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 148 flow [2023-08-03 21:54:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-03 21:54:50,535 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-08-03 21:54:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 148 flow [2023-08-03 21:54:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:50,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:50,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:54:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 21:54:50,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:50,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -401928990, now seen corresponding path program 2 times [2023-08-03 21:54:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:50,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926816940] [2023-08-03 21:54:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:54:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926816940] [2023-08-03 21:54:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926816940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:50,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:54:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662883723] [2023-08-03 21:54:50,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:54:50,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 245 [2023-08-03 21:54:50,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:50,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 245 [2023-08-03 21:54:50,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:50,940 INFO L124 PetriNetUnfolderBase]: 591/1027 cut-off events. [2023-08-03 21:54:50,940 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2023-08-03 21:54:50,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 1027 events. 591/1027 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4452 event pairs, 277 based on Foata normal form. 12/874 useless extension candidates. Maximal degree in co-relation 2877. Up to 577 conditions per place. [2023-08-03 21:54:50,944 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 35 selfloop transitions, 5 changer transitions 13/57 dead transitions. [2023-08-03 21:54:50,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 322 flow [2023-08-03 21:54:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:54:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:54:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 521 transitions. [2023-08-03 21:54:50,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253061224489796 [2023-08-03 21:54:50,946 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 521 transitions. [2023-08-03 21:54:50,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 521 transitions. [2023-08-03 21:54:50,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:50,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 521 transitions. [2023-08-03 21:54:50,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,948 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,948 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 148 flow. Second operand 5 states and 521 transitions. [2023-08-03 21:54:50,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 322 flow [2023-08-03 21:54:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:50,951 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 159 flow [2023-08-03 21:54:50,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-08-03 21:54:50,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-03 21:54:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 159 flow [2023-08-03 21:54:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:50,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:50,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 21:54:50,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:50,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 509426184, now seen corresponding path program 3 times [2023-08-03 21:54:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820372921] [2023-08-03 21:54:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:54:50,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:50,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820372921] [2023-08-03 21:54:50,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820372921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:50,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:50,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:54:50,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696973903] [2023-08-03 21:54:50,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:54:50,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:54:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:54:51,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 245 [2023-08-03 21:54:51,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:51,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 245 [2023-08-03 21:54:51,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:51,166 INFO L124 PetriNetUnfolderBase]: 578/1018 cut-off events. [2023-08-03 21:54:51,166 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-08-03 21:54:51,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 1018 events. 578/1018 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4516 event pairs, 388 based on Foata normal form. 12/864 useless extension candidates. Maximal degree in co-relation 2935. Up to 784 conditions per place. [2023-08-03 21:54:51,170 INFO L140 encePairwiseOnDemand]: 238/245 looper letters, 39 selfloop transitions, 5 changer transitions 12/60 dead transitions. [2023-08-03 21:54:51,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 369 flow [2023-08-03 21:54:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:54:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:54:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 524 transitions. [2023-08-03 21:54:51,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42775510204081635 [2023-08-03 21:54:51,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 524 transitions. [2023-08-03 21:54:51,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 524 transitions. [2023-08-03 21:54:51,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:51,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 524 transitions. [2023-08-03 21:54:51,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,174 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 159 flow. Second operand 5 states and 524 transitions. [2023-08-03 21:54:51,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 369 flow [2023-08-03 21:54:51,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 358 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:54:51,177 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 172 flow [2023-08-03 21:54:51,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2023-08-03 21:54:51,178 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-08-03 21:54:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 172 flow [2023-08-03 21:54:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:54:51,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:54:51,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:54:51,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:54:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash -502996633, now seen corresponding path program 1 times [2023-08-03 21:54:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:54:51,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163209145] [2023-08-03 21:54:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:54:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:54:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:54:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:54:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:54:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163209145] [2023-08-03 21:54:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163209145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:54:51,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:54:51,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:54:51,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053513438] [2023-08-03 21:54:51,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:54:51,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:54:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:54:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:54:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:54:51,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 245 [2023-08-03 21:54:51,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:54:51,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 245 [2023-08-03 21:54:51,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:54:51,273 INFO L124 PetriNetUnfolderBase]: 189/353 cut-off events. [2023-08-03 21:54:51,273 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2023-08-03 21:54:51,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 353 events. 189/353 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1386 event pairs, 93 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 986. Up to 213 conditions per place. [2023-08-03 21:54:51,274 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-03 21:54:51,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 182 flow [2023-08-03 21:54:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:54:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:54:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-03 21:54:51,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2023-08-03 21:54:51,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-03 21:54:51,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-03 21:54:51,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:54:51,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-03 21:54:51,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,277 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 172 flow. Second operand 3 states and 355 transitions. [2023-08-03 21:54:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 182 flow [2023-08-03 21:54:51,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 177 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-03 21:54:51,278 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-03 21:54:51,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-03 21:54:51,279 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-03 21:54:51,279 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-03 21:54:51,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:54:51,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:54:51,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:54:51,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 21:54:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 21:54:51,279 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1] [2023-08-03 21:54:51,279 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 21:54:51,281 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:54:51,281 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:54:51,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:54:51 BasicIcfg [2023-08-03 21:54:51,284 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:54:51,284 INFO L158 Benchmark]: Toolchain (without parser) took 10935.81ms. Allocated memory was 543.2MB in the beginning and 664.8MB in the end (delta: 121.6MB). Free memory was 505.0MB in the beginning and 523.6MB in the end (delta: -18.5MB). Peak memory consumption was 105.5MB. Max. memory is 16.0GB. [2023-08-03 21:54:51,284 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 381.7MB. Free memory is still 334.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:54:51,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.06ms. Allocated memory is still 543.2MB. Free memory was 504.6MB in the beginning and 485.0MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 21:54:51,284 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.59ms. Allocated memory is still 543.2MB. Free memory was 485.0MB in the beginning and 482.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:54:51,285 INFO L158 Benchmark]: Boogie Preprocessor took 27.53ms. Allocated memory is still 543.2MB. Free memory was 482.9MB in the beginning and 481.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:54:51,285 INFO L158 Benchmark]: RCFGBuilder took 272.14ms. Allocated memory is still 543.2MB. Free memory was 481.2MB in the beginning and 466.1MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-03 21:54:51,285 INFO L158 Benchmark]: TraceAbstraction took 10331.83ms. Allocated memory was 543.2MB in the beginning and 664.8MB in the end (delta: 121.6MB). Free memory was 465.3MB in the beginning and 523.6MB in the end (delta: -58.2MB). Peak memory consumption was 65.6MB. Max. memory is 16.0GB. [2023-08-03 21:54:51,286 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 381.7MB. Free memory is still 334.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 275.06ms. Allocated memory is still 543.2MB. Free memory was 504.6MB in the beginning and 485.0MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.59ms. Allocated memory is still 543.2MB. Free memory was 485.0MB in the beginning and 482.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.53ms. Allocated memory is still 543.2MB. Free memory was 482.9MB in the beginning and 481.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 272.14ms. Allocated memory is still 543.2MB. Free memory was 481.2MB in the beginning and 466.1MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 10331.83ms. Allocated memory was 543.2MB in the beginning and 664.8MB in the end (delta: 121.6MB). Free memory was 465.3MB in the beginning and 523.6MB in the end (delta: -58.2MB). Peak memory consumption was 65.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 77 PlacesBefore, 12 PlacesAfterwards, 82 TransitionsBefore, 10 TransitionsAfterwards, 1408 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 7 ChoiceCompositions, 86 TotalNumberOfCompositions, 1293 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1122, independent: 1106, independent conditional: 0, independent unconditional: 1106, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 748, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1122, independent: 363, independent conditional: 0, independent unconditional: 363, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 748, unknown conditional: 0, unknown unconditional: 748] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 117 PlacesBefore, 29 PlacesAfterwards, 127 TransitionsBefore, 32 TransitionsAfterwards, 6776 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 7 ChoiceCompositions, 116 TotalNumberOfCompositions, 9882 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6766, independent: 6601, independent conditional: 0, independent unconditional: 6601, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3669, independent: 3646, independent conditional: 0, independent unconditional: 3646, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6766, independent: 2955, independent conditional: 0, independent unconditional: 2955, dependent: 142, dependent conditional: 0, dependent unconditional: 142, unknown: 3669, unknown conditional: 0, unknown unconditional: 3669] , Statistics on independence cache: Total cache size (in pairs): 117, Positive cache size: 108, Positive conditional cache size: 0, Positive unconditional cache size: 108, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 117 PlacesBefore, 29 PlacesAfterwards, 127 TransitionsBefore, 32 TransitionsAfterwards, 6776 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 7 ChoiceCompositions, 118 TotalNumberOfCompositions, 9963 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6672, independent: 6508, independent conditional: 0, independent unconditional: 6508, dependent: 164, dependent conditional: 0, dependent unconditional: 164, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3632, independent: 3611, independent conditional: 0, independent unconditional: 3611, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6672, independent: 2897, independent conditional: 0, independent unconditional: 2897, dependent: 143, dependent conditional: 0, dependent unconditional: 143, unknown: 3632, unknown conditional: 0, unknown unconditional: 3632] , Statistics on independence cache: Total cache size (in pairs): 116, Positive cache size: 107, Positive conditional cache size: 0, Positive unconditional cache size: 107, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 719]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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 4 procedures, 151 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: 2.7s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 79 IncrementalHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 79 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 108 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 151 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.1s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 609 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 124 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1290 IncrementalHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 97 mSDtfsCounter, 1290 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=11, InterpolantAutomatonStates: 45, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 274 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 295 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 SizeOfPredicates, 4 NumberOfNonLiveVariables, 609 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 18 InterpolantComputations, 10 PerfectInterpolantSequences, 76/84 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! [2023-08-03 21:54:51,298 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...