/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:03:06,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:03:07,039 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:03:07,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:03:07,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:03:07,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:03:07,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:03:07,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:03:07,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:03:07,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:03:07,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:03:07,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:03:07,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:03:07,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:03:07,083 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:03:07,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:03:07,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:03:07,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:03:07,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:03:07,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:03:07,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:03:07,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:03:07,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:03:07,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:03:07,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:03:07,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:03:07,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:03:07,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:03:07,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:03:07,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:03:07,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:03:07,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:03:07,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:03:07,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:03:07,089 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:03:07,089 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:03:07,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:03:07,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:03:07,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:03:07,337 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:03:07,337 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:03:07,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-symm.wvr_bound2.c [2023-08-04 02:03:08,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:03:08,719 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:03:08,719 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-symm.wvr_bound2.c [2023-08-04 02:03:08,727 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650f25878/78681e89ea914d89ac941b124a8f7858/FLAG92ee5de8b [2023-08-04 02:03:08,740 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650f25878/78681e89ea914d89ac941b124a8f7858 [2023-08-04 02:03:08,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:03:08,744 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:03:08,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:03:08,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:03:08,748 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:03:08,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:08,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e7b2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08, skipping insertion in model container [2023-08-04 02:03:08,750 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:08,769 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:03:08,931 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-symm.wvr_bound2.c[2657,2670] [2023-08-04 02:03:08,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:03:08,942 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:03:08,968 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-file-item-symm.wvr_bound2.c[2657,2670] [2023-08-04 02:03:08,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:03:08,981 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:03:08,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08 WrapperNode [2023-08-04 02:03:08,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:03:08,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:03:08,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:03:08,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:03:08,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:08,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,021 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 180 [2023-08-04 02:03:09,021 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:03:09,022 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:03:09,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:03:09,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:03:09,031 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,043 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:03:09,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:03:09,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:03:09,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:03:09,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (1/1) ... [2023-08-04 02:03:09,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:03:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:09,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:03:09,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:03:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:03:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:03:09,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:03:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:03:09,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:03:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:03:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:03:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:03:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:03:09,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:03:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:03:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:03:09,128 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:03:09,243 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:03:09,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:03:09,565 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:03:09,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:03:09,573 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 02:03:09,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:03:09 BoogieIcfgContainer [2023-08-04 02:03:09,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:03:09,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:03:09,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:03:09,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:03:09,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:03:08" (1/3) ... [2023-08-04 02:03:09,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197a1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:03:09, skipping insertion in model container [2023-08-04 02:03:09,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:03:08" (2/3) ... [2023-08-04 02:03:09,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3197a1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:03:09, skipping insertion in model container [2023-08-04 02:03:09,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:03:09" (3/3) ... [2023-08-04 02:03:09,583 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-file-item-symm.wvr_bound2.c [2023-08-04 02:03:09,590 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:03:09,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:03:09,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:03:09,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:03:09,726 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:03:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:09,911 INFO L124 PetriNetUnfolderBase]: 52/415 cut-off events. [2023-08-04 02:03:09,912 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:03:09,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 415 events. 52/415 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1841 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-04 02:03:09,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:09,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:09,938 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:09,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:09,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 205 transitions, 432 flow [2023-08-04 02:03:10,031 INFO L124 PetriNetUnfolderBase]: 52/415 cut-off events. [2023-08-04 02:03:10,031 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:03:10,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 415 events. 52/415 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1841 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-04 02:03:10,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 15664 [2023-08-04 02:03:15,407 INFO L134 LiptonReduction]: Checked pairs total: 16632 [2023-08-04 02:03:15,407 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-04 02:03:15,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:03:15,425 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;@7ab8a9d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:15,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:03:15,430 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:15,431 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-08-04 02:03:15,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:03:15,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:15,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:03:15,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:03:15,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -529113198, now seen corresponding path program 1 times [2023-08-04 02:03:15,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:15,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665856366] [2023-08-04 02:03:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:15,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:03:15,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:03:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:03:15,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:03:15,616 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:03:15,617 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:03:15,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:03:15,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:03:15,623 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:03:15,628 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:03:15,629 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:03:15,629 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:03:15,686 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:03:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:15,968 INFO L124 PetriNetUnfolderBase]: 197/1304 cut-off events. [2023-08-04 02:03:15,968 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:03:15,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401 conditions, 1304 events. 197/1304 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7987 event pairs, 1 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 759. Up to 32 conditions per place. [2023-08-04 02:03:15,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:15,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:15,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:15,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:15,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:15,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:16,208 INFO L124 PetriNetUnfolderBase]: 197/1304 cut-off events. [2023-08-04 02:03:16,208 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:03:16,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401 conditions, 1304 events. 197/1304 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7987 event pairs, 1 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 759. Up to 32 conditions per place. [2023-08-04 02:03:16,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 48576 [2023-08-04 02:03:23,939 INFO L134 LiptonReduction]: Checked pairs total: 53345 [2023-08-04 02:03:23,939 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-08-04 02:03:23,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:03:23,943 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;@7ab8a9d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:23,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:03:23,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:23,952 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-04 02:03:23,952 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:03:23,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:23,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:03:23,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:03:23,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash -162425298, now seen corresponding path program 1 times [2023-08-04 02:03:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080186657] [2023-08-04 02:03:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080186657] [2023-08-04 02:03:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080186657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006039460] [2023-08-04 02:03:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:24,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:24,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:24,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:03:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:24,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:03:24,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:24,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:24,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006039460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:24,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:24,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:03:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891886618] [2023-08-04 02:03:24,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:03:24,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 653 [2023-08-04 02:03:24,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:24,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 653 [2023-08-04 02:03:24,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:24,936 INFO L124 PetriNetUnfolderBase]: 1284/2372 cut-off events. [2023-08-04 02:03:24,937 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-04 02:03:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 2372 events. 1284/2372 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13120 event pairs, 542 based on Foata normal form. 81/2232 useless extension candidates. Maximal degree in co-relation 1831. Up to 2121 conditions per place. [2023-08-04 02:03:24,944 INFO L140 encePairwiseOnDemand]: 647/653 looper letters, 16 selfloop transitions, 5 changer transitions 20/44 dead transitions. [2023-08-04 02:03:24,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 208 flow [2023-08-04 02:03:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1371 transitions. [2023-08-04 02:03:24,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199081163859112 [2023-08-04 02:03:24,963 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1371 transitions. [2023-08-04 02:03:24,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1371 transitions. [2023-08-04 02:03:24,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:24,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1371 transitions. [2023-08-04 02:03:24,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 653.0) internal successors, (3918), 6 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,984 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 653.0) internal successors, (3918), 6 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,986 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 5 states and 1371 transitions. [2023-08-04 02:03:24,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 208 flow [2023-08-04 02:03:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:24,992 INFO L231 Difference]: Finished difference. Result has 41 places, 20 transitions, 75 flow [2023-08-04 02:03:24,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=41, PETRI_TRANSITIONS=20} [2023-08-04 02:03:24,996 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-04 02:03:24,997 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 20 transitions, 75 flow [2023-08-04 02:03:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.6) internal successors, (1338), 5 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:24,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:24,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:03:25,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:25,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:25,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:03:25,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash 462949267, now seen corresponding path program 1 times [2023-08-04 02:03:25,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:25,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146259056] [2023-08-04 02:03:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146259056] [2023-08-04 02:03:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146259056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:25,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:03:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225810151] [2023-08-04 02:03:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:03:25,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 653 [2023-08-04 02:03:25,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 20 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:25,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 653 [2023-08-04 02:03:25,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:25,375 INFO L124 PetriNetUnfolderBase]: 180/349 cut-off events. [2023-08-04 02:03:25,375 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 02:03:25,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 349 events. 180/349 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1280 event pairs, 114 based on Foata normal form. 1/344 useless extension candidates. Maximal degree in co-relation 308. Up to 313 conditions per place. [2023-08-04 02:03:25,377 INFO L140 encePairwiseOnDemand]: 650/653 looper letters, 16 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-04 02:03:25,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 112 flow [2023-08-04 02:03:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2023-08-04 02:03:25,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41807044410413474 [2023-08-04 02:03:25,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2023-08-04 02:03:25,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2023-08-04 02:03:25,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:25,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2023-08-04 02:03:25,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,387 INFO L175 Difference]: Start difference. First operand has 41 places, 20 transitions, 75 flow. Second operand 3 states and 819 transitions. [2023-08-04 02:03:25,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 112 flow [2023-08-04 02:03:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 109 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:25,388 INFO L231 Difference]: Finished difference. Result has 30 places, 19 transitions, 71 flow [2023-08-04 02:03:25,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=19} [2023-08-04 02:03:25,389 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 02:03:25,389 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 19 transitions, 71 flow [2023-08-04 02:03:25,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:25,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:25,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:03:25,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:03:25,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 560125447, now seen corresponding path program 1 times [2023-08-04 02:03:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193161328] [2023-08-04 02:03:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193161328] [2023-08-04 02:03:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193161328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432356085] [2023-08-04 02:03:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:25,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:03:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:25,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432356085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:25,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:03:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639891912] [2023-08-04 02:03:25,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:25,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 653 [2023-08-04 02:03:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 19 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 653 [2023-08-04 02:03:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:25,670 INFO L124 PetriNetUnfolderBase]: 136/255 cut-off events. [2023-08-04 02:03:25,670 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 02:03:25,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 255 events. 136/255 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 769 event pairs, 48 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 310. Up to 217 conditions per place. [2023-08-04 02:03:25,673 INFO L140 encePairwiseOnDemand]: 650/653 looper letters, 16 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-04 02:03:25,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 114 flow [2023-08-04 02:03:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1084 transitions. [2023-08-04 02:03:25,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41500765696784075 [2023-08-04 02:03:25,676 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1084 transitions. [2023-08-04 02:03:25,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1084 transitions. [2023-08-04 02:03:25,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:25,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1084 transitions. [2023-08-04 02:03:25,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 653.0) internal successors, (3265), 5 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,684 INFO L175 Difference]: Start difference. First operand has 30 places, 19 transitions, 71 flow. Second operand 4 states and 1084 transitions. [2023-08-04 02:03:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 114 flow [2023-08-04 02:03:25,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:25,686 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 68 flow [2023-08-04 02:03:25,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-04 02:03:25,689 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -9 predicate places. [2023-08-04 02:03:25,689 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 68 flow [2023-08-04 02:03:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:25,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:25,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:03:25,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:03:25,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash 955846682, now seen corresponding path program 1 times [2023-08-04 02:03:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:25,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194353406] [2023-08-04 02:03:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:25,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:03:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194353406] [2023-08-04 02:03:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194353406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221706112] [2023-08-04 02:03:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:26,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:26,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:26,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:03:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:26,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:03:26,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:03:26,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:26,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221706112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:26,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:26,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:03:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58354452] [2023-08-04 02:03:26,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:26,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:26,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:03:26,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 653 [2023-08-04 02:03:26,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:26,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 653 [2023-08-04 02:03:26,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:26,217 INFO L124 PetriNetUnfolderBase]: 104/199 cut-off events. [2023-08-04 02:03:26,218 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 02:03:26,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 199 events. 104/199 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 536 event pairs, 8 based on Foata normal form. 16/211 useless extension candidates. Maximal degree in co-relation 237. Up to 80 conditions per place. [2023-08-04 02:03:26,218 INFO L140 encePairwiseOnDemand]: 650/653 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 02:03:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 138 flow [2023-08-04 02:03:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1356 transitions. [2023-08-04 02:03:26,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153139356814701 [2023-08-04 02:03:26,223 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1356 transitions. [2023-08-04 02:03:26,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1356 transitions. [2023-08-04 02:03:26,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:26,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1356 transitions. [2023-08-04 02:03:26,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 653.0) internal successors, (3918), 6 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 653.0) internal successors, (3918), 6 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,233 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 68 flow. Second operand 5 states and 1356 transitions. [2023-08-04 02:03:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 138 flow [2023-08-04 02:03:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:03:26,236 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 02:03:26,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 02:03:26,238 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -10 predicate places. [2023-08-04 02:03:26,238 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 02:03:26,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.6) internal successors, (1343), 5 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:26,239 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:03:26,239 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:03:26,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 02:03:26,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:26,445 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:03:26,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:03:26,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,628 INFO L124 PetriNetUnfolderBase]: 197/1304 cut-off events. [2023-08-04 02:03:26,628 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:03:26,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401 conditions, 1304 events. 197/1304 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7987 event pairs, 1 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 759. Up to 32 conditions per place. [2023-08-04 02:03:26,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:03:26,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 299 transitions, 646 flow [2023-08-04 02:03:26,804 INFO L124 PetriNetUnfolderBase]: 197/1304 cut-off events. [2023-08-04 02:03:26,805 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:03:26,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401 conditions, 1304 events. 197/1304 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7987 event pairs, 1 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 759. Up to 32 conditions per place. [2023-08-04 02:03:26,870 INFO L119 LiptonReduction]: Number of co-enabled transitions 48576 [2023-08-04 02:03:34,035 INFO L134 LiptonReduction]: Checked pairs total: 54228 [2023-08-04 02:03:34,035 INFO L136 LiptonReduction]: Total number of compositions: 364 [2023-08-04 02:03:34,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:03:34,038 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;@7ab8a9d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:03:34,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:03:34,040 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:03:34,040 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-04 02:03:34,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:03:34,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:34,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:03:34,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:34,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1772979453, now seen corresponding path program 1 times [2023-08-04 02:03:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:34,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850452179] [2023-08-04 02:03:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850452179] [2023-08-04 02:03:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850452179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:34,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:03:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342042980] [2023-08-04 02:03:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:34,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:03:34,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 663 [2023-08-04 02:03:34,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:34,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 663 [2023-08-04 02:03:34,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:34,555 INFO L124 PetriNetUnfolderBase]: 1269/2320 cut-off events. [2023-08-04 02:03:34,555 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-04 02:03:34,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 2320 events. 1269/2320 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12531 event pairs, 803 based on Foata normal form. 81/2185 useless extension candidates. Maximal degree in co-relation 1824. Up to 2103 conditions per place. [2023-08-04 02:03:34,564 INFO L140 encePairwiseOnDemand]: 658/663 looper letters, 32 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-04 02:03:34,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 198 flow [2023-08-04 02:03:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-08-04 02:03:34,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213172448466566 [2023-08-04 02:03:34,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-08-04 02:03:34,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-08-04 02:03:34,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:34,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-08-04 02:03:34,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,580 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 128 flow. Second operand 3 states and 838 transitions. [2023-08-04 02:03:34,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 198 flow [2023-08-04 02:03:34,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:03:34,583 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 124 flow [2023-08-04 02:03:34,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-04 02:03:34,585 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 02:03:34,585 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 124 flow [2023-08-04 02:03:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:34,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:03:34,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:34,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2112148142, now seen corresponding path program 1 times [2023-08-04 02:03:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831540508] [2023-08-04 02:03:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:03:34,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:34,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831540508] [2023-08-04 02:03:34,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831540508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:34,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545876543] [2023-08-04 02:03:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:34,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:34,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:34,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:34,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:03:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:34,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:34,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:03:34,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:34,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545876543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:34,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678007074] [2023-08-04 02:03:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:34,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:34,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:34,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 663 [2023-08-04 02:03:34,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:34,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:34,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 663 [2023-08-04 02:03:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:35,280 INFO L124 PetriNetUnfolderBase]: 1263/2332 cut-off events. [2023-08-04 02:03:35,281 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 02:03:35,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2332 events. 1263/2332 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12714 event pairs, 806 based on Foata normal form. 0/2128 useless extension candidates. Maximal degree in co-relation 4699. Up to 2057 conditions per place. [2023-08-04 02:03:35,289 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 35 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 02:03:35,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 208 flow [2023-08-04 02:03:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-08-04 02:03:35,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213172448466566 [2023-08-04 02:03:35,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-08-04 02:03:35,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-08-04 02:03:35,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:35,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-08-04 02:03:35,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,298 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 124 flow. Second operand 3 states and 838 transitions. [2023-08-04 02:03:35,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 208 flow [2023-08-04 02:03:35,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:35,301 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 128 flow [2023-08-04 02:03:35,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-04 02:03:35,303 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-08-04 02:03:35,303 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 128 flow [2023-08-04 02:03:35,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:35,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:35,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:35,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:35,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 869599183, now seen corresponding path program 1 times [2023-08-04 02:03:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567942296] [2023-08-04 02:03:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:03:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567942296] [2023-08-04 02:03:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567942296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535575733] [2023-08-04 02:03:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:35,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:35,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:03:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:35,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:35,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:03:35,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:35,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535575733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:35,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430357272] [2023-08-04 02:03:35,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:35,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 663 [2023-08-04 02:03:35,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:35,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:35,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 663 [2023-08-04 02:03:35,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:36,120 INFO L124 PetriNetUnfolderBase]: 1109/2106 cut-off events. [2023-08-04 02:03:36,120 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 02:03:36,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 2106 events. 1109/2106 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11495 event pairs, 772 based on Foata normal form. 0/1970 useless extension candidates. Maximal degree in co-relation 1994. Up to 1577 conditions per place. [2023-08-04 02:03:36,129 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 41 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 02:03:36,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 244 flow [2023-08-04 02:03:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 02:03:36,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238310708898944 [2023-08-04 02:03:36,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:36,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,140 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 128 flow. Second operand 3 states and 843 transitions. [2023-08-04 02:03:36,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 244 flow [2023-08-04 02:03:36,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:36,143 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 138 flow [2023-08-04 02:03:36,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 02:03:36,144 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 02:03:36,145 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 138 flow [2023-08-04 02:03:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:36,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:36,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:36,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:36,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1620778074, now seen corresponding path program 1 times [2023-08-04 02:03:36,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:36,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954761391] [2023-08-04 02:03:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:03:36,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954761391] [2023-08-04 02:03:36,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954761391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445914247] [2023-08-04 02:03:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:36,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:36,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:36,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:03:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:36,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:03:36,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:36,521 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:03:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445914247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:36,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:03:36,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:03:36,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277477973] [2023-08-04 02:03:36,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:36,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:03:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:03:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:36,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 663 [2023-08-04 02:03:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:36,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 663 [2023-08-04 02:03:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:36,917 INFO L124 PetriNetUnfolderBase]: 1020/1973 cut-off events. [2023-08-04 02:03:36,917 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 02:03:36,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 1973 events. 1020/1973 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10303 event pairs, 731 based on Foata normal form. 0/1934 useless extension candidates. Maximal degree in co-relation 2146. Up to 1403 conditions per place. [2023-08-04 02:03:36,926 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 42 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 02:03:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 256 flow [2023-08-04 02:03:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:03:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:03:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-08-04 02:03:36,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238310708898944 [2023-08-04 02:03:36,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:36,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-08-04 02:03:36,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,935 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 138 flow. Second operand 3 states and 843 transitions. [2023-08-04 02:03:36,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 256 flow [2023-08-04 02:03:36,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:36,938 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 148 flow [2023-08-04 02:03:36,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-04 02:03:36,940 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-04 02:03:36,940 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 148 flow [2023-08-04 02:03:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:36,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:36,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:37,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:37,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash -858063480, now seen corresponding path program 1 times [2023-08-04 02:03:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:37,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479435370] [2023-08-04 02:03:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:37,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479435370] [2023-08-04 02:03:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479435370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738959594] [2023-08-04 02:03:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:37,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:37,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:37,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:03:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:37,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:37,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:37,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:03:37,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738959594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:37,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:37,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:03:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496163747] [2023-08-04 02:03:37,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:37,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:37,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 663 [2023-08-04 02:03:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 663 [2023-08-04 02:03:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:37,677 INFO L124 PetriNetUnfolderBase]: 918/1777 cut-off events. [2023-08-04 02:03:37,677 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 02:03:37,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1777 events. 918/1777 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9152 event pairs, 415 based on Foata normal form. 2/1775 useless extension candidates. Maximal degree in co-relation 2162. Up to 1587 conditions per place. [2023-08-04 02:03:37,685 INFO L140 encePairwiseOnDemand]: 659/663 looper letters, 36 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2023-08-04 02:03:37,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 238 flow [2023-08-04 02:03:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1102 transitions. [2023-08-04 02:03:37,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155354449472097 [2023-08-04 02:03:37,689 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1102 transitions. [2023-08-04 02:03:37,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1102 transitions. [2023-08-04 02:03:37,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:37,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1102 transitions. [2023-08-04 02:03:37,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.5) internal successors, (1102), 4 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:37,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:37,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:37,696 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 148 flow. Second operand 4 states and 1102 transitions. [2023-08-04 02:03:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 238 flow [2023-08-04 02:03:37,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:37,701 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 160 flow [2023-08-04 02:03:37,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-04 02:03:37,702 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 02:03:37,702 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 160 flow [2023-08-04 02:03:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:37,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:37,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:37,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:37,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:37,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:37,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 178591219, now seen corresponding path program 1 times [2023-08-04 02:03:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:37,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244079991] [2023-08-04 02:03:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:37,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244079991] [2023-08-04 02:03:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244079991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701566465] [2023-08-04 02:03:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:37,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:37,988 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:37,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:03:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:38,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:38,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:38,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:03:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701566465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:38,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644793116] [2023-08-04 02:03:38,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:38,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 663 [2023-08-04 02:03:38,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:38,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 663 [2023-08-04 02:03:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:38,456 INFO L124 PetriNetUnfolderBase]: 866/1681 cut-off events. [2023-08-04 02:03:38,456 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 02:03:38,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1681 events. 866/1681 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8368 event pairs, 392 based on Foata normal form. 8/1685 useless extension candidates. Maximal degree in co-relation 2393. Up to 1367 conditions per place. [2023-08-04 02:03:38,463 INFO L140 encePairwiseOnDemand]: 659/663 looper letters, 40 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 02:03:38,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 266 flow [2023-08-04 02:03:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1106 transitions. [2023-08-04 02:03:38,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41704374057315236 [2023-08-04 02:03:38,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1106 transitions. [2023-08-04 02:03:38,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1106 transitions. [2023-08-04 02:03:38,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:38,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1106 transitions. [2023-08-04 02:03:38,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,477 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 160 flow. Second operand 4 states and 1106 transitions. [2023-08-04 02:03:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 266 flow [2023-08-04 02:03:38,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 257 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:38,482 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 165 flow [2023-08-04 02:03:38,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-04 02:03:38,483 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-08-04 02:03:38,483 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 165 flow [2023-08-04 02:03:38,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:38,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:38,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:03:38,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:03:38,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:38,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -645448827, now seen corresponding path program 1 times [2023-08-04 02:03:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135746681] [2023-08-04 02:03:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:03:38,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135746681] [2023-08-04 02:03:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135746681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369435837] [2023-08-04 02:03:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:38,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:38,777 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:38,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:03:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:38,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:38,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:03:38,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:03:38,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369435837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:38,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:38,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:38,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693546659] [2023-08-04 02:03:38,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:38,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 663 [2023-08-04 02:03:38,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 271.4) internal successors, (1357), 5 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:38,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:38,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 663 [2023-08-04 02:03:38,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:39,191 INFO L124 PetriNetUnfolderBase]: 542/1069 cut-off events. [2023-08-04 02:03:39,191 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 02:03:39,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1069 events. 542/1069 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4520 event pairs, 223 based on Foata normal form. 32/1097 useless extension candidates. Maximal degree in co-relation 1905. Up to 470 conditions per place. [2023-08-04 02:03:39,196 INFO L140 encePairwiseOnDemand]: 659/663 looper letters, 45 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-04 02:03:39,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 300 flow [2023-08-04 02:03:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1111 transitions. [2023-08-04 02:03:39,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189291101055807 [2023-08-04 02:03:39,200 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:39,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,207 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,207 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 165 flow. Second operand 4 states and 1111 transitions. [2023-08-04 02:03:39,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 300 flow [2023-08-04 02:03:39,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 290 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:39,210 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 176 flow [2023-08-04 02:03:39,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-04 02:03:39,211 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-08-04 02:03:39,211 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 176 flow [2023-08-04 02:03:39,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.4) internal successors, (1357), 5 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:39,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:39,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:03:39,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:39,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:39,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1557857223, now seen corresponding path program 1 times [2023-08-04 02:03:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:39,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816031126] [2023-08-04 02:03:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:03:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816031126] [2023-08-04 02:03:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816031126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:39,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692702923] [2023-08-04 02:03:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:39,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:03:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:39,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:03:39,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:03:39,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:03:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692702923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:39,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:03:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114250457] [2023-08-04 02:03:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:03:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:03:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:03:39,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 663 [2023-08-04 02:03:39,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:39,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 663 [2023-08-04 02:03:39,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:39,930 INFO L124 PetriNetUnfolderBase]: 530/1026 cut-off events. [2023-08-04 02:03:39,931 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 02:03:39,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 1026 events. 530/1026 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4236 event pairs, 439 based on Foata normal form. 9/1031 useless extension candidates. Maximal degree in co-relation 2086. Up to 751 conditions per place. [2023-08-04 02:03:39,934 INFO L140 encePairwiseOnDemand]: 659/663 looper letters, 45 selfloop transitions, 3 changer transitions 2/55 dead transitions. [2023-08-04 02:03:39,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 312 flow [2023-08-04 02:03:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:03:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:03:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1111 transitions. [2023-08-04 02:03:39,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189291101055807 [2023-08-04 02:03:39,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:39,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1111 transitions. [2023-08-04 02:03:39,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,948 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,948 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 176 flow. Second operand 4 states and 1111 transitions. [2023-08-04 02:03:39,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 312 flow [2023-08-04 02:03:39,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 308 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:03:39,951 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 180 flow [2023-08-04 02:03:39,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 02:03:39,952 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-08-04 02:03:39,952 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 180 flow [2023-08-04 02:03:39,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.8) internal successors, (1359), 5 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:39,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:39,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:39,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 02:03:40,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:03:40,158 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:40,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 81070861, now seen corresponding path program 1 times [2023-08-04 02:03:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:40,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346955907] [2023-08-04 02:03:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:40,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:03:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346955907] [2023-08-04 02:03:42,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346955907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:03:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497041133] [2023-08-04 02:03:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:42,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:03:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:03:42,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:03:42,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:03:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:42,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 02:03:42,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:03:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:03:44,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:03:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:03:46,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497041133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:03:46,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:03:46,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-04 02:03:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087838794] [2023-08-04 02:03:46,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:03:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:03:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:03:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-04 02:03:47,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 663 [2023-08-04 02:03:47,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 230.53846153846155) internal successors, (2997), 13 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:47,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:47,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 663 [2023-08-04 02:03:47,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:48,410 INFO L124 PetriNetUnfolderBase]: 725/1401 cut-off events. [2023-08-04 02:03:48,411 INFO L125 PetriNetUnfolderBase]: For 1073/1073 co-relation queries the response was YES. [2023-08-04 02:03:48,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1401 events. 725/1401 cut-off events. For 1073/1073 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6952 event pairs, 121 based on Foata normal form. 1/1395 useless extension candidates. Maximal degree in co-relation 3547. Up to 670 conditions per place. [2023-08-04 02:03:48,417 INFO L140 encePairwiseOnDemand]: 655/663 looper letters, 49 selfloop transitions, 5 changer transitions 39/98 dead transitions. [2023-08-04 02:03:48,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 643 flow [2023-08-04 02:03:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:03:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:03:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1665 transitions. [2023-08-04 02:03:48,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587588881706529 [2023-08-04 02:03:48,423 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1665 transitions. [2023-08-04 02:03:48,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1665 transitions. [2023-08-04 02:03:48,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:48,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1665 transitions. [2023-08-04 02:03:48,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 237.85714285714286) internal successors, (1665), 7 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:48,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 663.0) internal successors, (5304), 8 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:48,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 663.0) internal successors, (5304), 8 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:48,433 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 180 flow. Second operand 7 states and 1665 transitions. [2023-08-04 02:03:48,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 643 flow [2023-08-04 02:03:48,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 622 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:03:48,439 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 222 flow [2023-08-04 02:03:48,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2023-08-04 02:03:48,439 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2023-08-04 02:03:48,440 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 222 flow [2023-08-04 02:03:48,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 230.53846153846155) internal successors, (2997), 13 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:48,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:03:48,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:48,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 02:03:48,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:03:48,646 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:03:48,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:03:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1651249913, now seen corresponding path program 2 times [2023-08-04 02:03:48,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:03:48,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790919639] [2023-08-04 02:03:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:03:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:03:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:03:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:03:50,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:03:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790919639] [2023-08-04 02:03:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790919639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:03:50,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:03:50,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 02:03:50,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319858814] [2023-08-04 02:03:50,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:03:50,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 02:03:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:03:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 02:03:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:03:51,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 663 [2023-08-04 02:03:51,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:51,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:03:51,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 663 [2023-08-04 02:03:51,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:51,850 INFO L124 PetriNetUnfolderBase]: 235/564 cut-off events. [2023-08-04 02:03:51,850 INFO L125 PetriNetUnfolderBase]: For 887/887 co-relation queries the response was YES. [2023-08-04 02:03:51,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 564 events. 235/564 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2688 event pairs, 39 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 1914. Up to 443 conditions per place. [2023-08-04 02:03:51,852 INFO L140 encePairwiseOnDemand]: 655/663 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-04 02:03:51,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 426 flow [2023-08-04 02:03:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:03:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:03:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1758 transitions. [2023-08-04 02:03:51,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37879767291531996 [2023-08-04 02:03:51,857 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1758 transitions. [2023-08-04 02:03:51,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1758 transitions. [2023-08-04 02:03:51,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:51,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1758 transitions. [2023-08-04 02:03:51,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 251.14285714285714) internal successors, (1758), 7 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:51,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 663.0) internal successors, (5304), 8 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:51,866 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 663.0) internal successors, (5304), 8 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:51,867 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 222 flow. Second operand 7 states and 1758 transitions. [2023-08-04 02:03:51,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 426 flow [2023-08-04 02:03:51,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 422 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 02:03:51,870 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 02:03:51,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 02:03:51,871 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2023-08-04 02:03:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 02:03:51,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 248.66666666666666) internal successors, (1492), 6 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:03:51,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:03:51,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:03:51,872 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:03:51,872 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:03:51,872 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:03:51,872 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:03:51,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:03:51 BasicIcfg [2023-08-04 02:03:51,876 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:03:51,877 INFO L158 Benchmark]: Toolchain (without parser) took 43132.84ms. Allocated memory was 553.6MB in the beginning and 1.2GB in the end (delta: 660.6MB). Free memory was 500.1MB in the beginning and 900.3MB in the end (delta: -400.2MB). Peak memory consumption was 262.3MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,877 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 354.4MB. Free memory is still 303.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:03:51,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.54ms. Allocated memory is still 553.6MB. Free memory was 500.1MB in the beginning and 488.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.30ms. Allocated memory is still 553.6MB. Free memory was 488.9MB in the beginning and 486.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,878 INFO L158 Benchmark]: Boogie Preprocessor took 26.65ms. Allocated memory is still 553.6MB. Free memory was 486.8MB in the beginning and 484.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,878 INFO L158 Benchmark]: RCFGBuilder took 525.47ms. Allocated memory is still 553.6MB. Free memory was 484.7MB in the beginning and 465.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,878 INFO L158 Benchmark]: TraceAbstraction took 42298.88ms. Allocated memory was 553.6MB in the beginning and 1.2GB in the end (delta: 660.6MB). Free memory was 465.3MB in the beginning and 900.3MB in the end (delta: -435.0MB). Peak memory consumption was 228.7MB. Max. memory is 16.0GB. [2023-08-04 02:03:51,880 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 354.4MB. Free memory is still 303.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 237.54ms. Allocated memory is still 553.6MB. Free memory was 500.1MB in the beginning and 488.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.30ms. Allocated memory is still 553.6MB. Free memory was 488.9MB in the beginning and 486.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.65ms. Allocated memory is still 553.6MB. Free memory was 486.8MB in the beginning and 484.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 525.47ms. Allocated memory is still 553.6MB. Free memory was 484.7MB in the beginning and 465.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 42298.88ms. Allocated memory was 553.6MB in the beginning and 1.2GB in the end (delta: 660.6MB). Free memory was 465.3MB in the beginning and 900.3MB in the end (delta: -435.0MB). Peak memory consumption was 228.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 187 PlacesBefore, 30 PlacesAfterwards, 205 TransitionsBefore, 30 TransitionsAfterwards, 15664 CoEnabledTransitionPairs, 8 FixpointIterations, 39 TrivialSequentialCompositions, 120 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 57 ConcurrentYvCompositions, 18 ChoiceCompositions, 234 TotalNumberOfCompositions, 16632 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15944, independent: 15899, independent conditional: 0, independent unconditional: 15899, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9386, independent: 9358, independent conditional: 0, independent unconditional: 9358, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 15944, independent: 6541, independent conditional: 0, independent unconditional: 6541, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 9386, unknown conditional: 0, unknown unconditional: 9386] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.0s, 269 PlacesBefore, 40 PlacesAfterwards, 299 TransitionsBefore, 40 TransitionsAfterwards, 48576 CoEnabledTransitionPairs, 8 FixpointIterations, 39 TrivialSequentialCompositions, 185 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 100 ConcurrentYvCompositions, 30 ChoiceCompositions, 354 TotalNumberOfCompositions, 53345 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 50869, independent: 50802, independent conditional: 0, independent unconditional: 50802, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 28334, independent: 28296, independent conditional: 0, independent unconditional: 28296, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 50869, independent: 22506, independent conditional: 0, independent unconditional: 22506, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 28334, unknown conditional: 0, unknown unconditional: 28334] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.4s, 269 PlacesBefore, 40 PlacesAfterwards, 299 TransitionsBefore, 40 TransitionsAfterwards, 48576 CoEnabledTransitionPairs, 8 FixpointIterations, 39 TrivialSequentialCompositions, 193 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 102 ConcurrentYvCompositions, 30 ChoiceCompositions, 364 TotalNumberOfCompositions, 54228 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 51685, independent: 51622, independent conditional: 0, independent unconditional: 51622, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 28448, independent: 28404, independent conditional: 0, independent unconditional: 28404, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 51685, independent: 23218, independent conditional: 0, independent unconditional: 23218, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 28448, unknown conditional: 0, unknown unconditional: 28448] , Statistics on independence cache: Total cache size (in pairs): 68, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 74]: 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 5 procedures, 261 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: 5.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred 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 7 procedures, 339 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: 10.8s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 104 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222 IncrementalHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 0 mSDtfsCounter, 222 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 17, 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, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 321 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 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 7 procedures, 339 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: 25.4s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1226 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 925 mSDsluCounter, 1032 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 894 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2292 IncrementalHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 138 mSDtfsCounter, 2292 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 434 GetRequests, 381 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=222occurred in iteration=9, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 494 NumberOfCodeBlocks, 494 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 644 ConstructedInterpolants, 0 QuantifiedInterpolants, 8716 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1050 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 214/235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:03:51,912 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...