./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 17:10:43,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 17:10:44,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 17:10:44,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 17:10:44,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 17:10:44,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 17:10:44,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 17:10:44,088 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 17:10:44,088 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 17:10:44,089 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 17:10:44,089 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 17:10:44,090 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 17:10:44,090 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 17:10:44,091 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 17:10:44,091 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 17:10:44,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 17:10:44,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 17:10:44,095 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 17:10:44,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 17:10:44,096 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 17:10:44,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 17:10:44,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 17:10:44,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 17:10:44,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 17:10:44,099 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 17:10:44,099 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 17:10:44,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 17:10:44,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 17:10:44,100 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 17:10:44,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 17:10:44,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 17:10:44,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 17:10:44,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:10:44,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 17:10:44,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 17:10:44,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 17:10:44,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 17:10:44,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 17:10:44,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 17:10:44,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 17:10:44,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 17:10:44,105 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 17:10:44,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2024-11-19 17:10:44,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 17:10:44,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 17:10:44,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 17:10:44,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 17:10:44,632 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 17:10:44,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c [2024-11-19 17:10:46,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 17:10:46,984 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 17:10:46,985 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c [2024-11-19 17:10:47,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537747320/6cd52a5b6e0a4df190c8cfbca32e6074/FLAG15e8e145f [2024-11-19 17:10:47,316 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537747320/6cd52a5b6e0a4df190c8cfbca32e6074 [2024-11-19 17:10:47,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 17:10:47,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 17:10:47,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 17:10:47,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 17:10:47,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 17:10:47,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b72933f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47, skipping insertion in model container [2024-11-19 17:10:47,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 17:10:47,710 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2024-11-19 17:10:47,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:10:47,753 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 17:10:47,768 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2024-11-19 17:10:47,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:10:47,817 INFO L204 MainTranslator]: Completed translation [2024-11-19 17:10:47,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47 WrapperNode [2024-11-19 17:10:47,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 17:10:47,822 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 17:10:47,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 17:10:47,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 17:10:47,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,877 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-11-19 17:10:47,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 17:10:47,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 17:10:47,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 17:10:47,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 17:10:47,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,912 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,931 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 8, 2, 4]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2024-11-19 17:10:47,932 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 17:10:47,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 17:10:47,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 17:10:47,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 17:10:47,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (1/1) ... [2024-11-19 17:10:47,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:10:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:47,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 17:10:47,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 17:10:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 17:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 17:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 17:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 17:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 17:10:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 17:10:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 17:10:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 17:10:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 17:10:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 17:10:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 17:10:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 17:10:48,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 17:10:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 17:10:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 17:10:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 17:10:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 17:10:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 17:10:48,151 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 17:10:48,154 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 17:10:48,338 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-19 17:10:48,338 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 17:10:48,356 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 17:10:48,357 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 17:10:48,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:48 BoogieIcfgContainer [2024-11-19 17:10:48,358 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 17:10:48,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 17:10:48,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 17:10:48,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 17:10:48,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:10:47" (1/3) ... [2024-11-19 17:10:48,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3521f809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:48, skipping insertion in model container [2024-11-19 17:10:48,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:47" (2/3) ... [2024-11-19 17:10:48,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3521f809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:48, skipping insertion in model container [2024-11-19 17:10:48,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:48" (3/3) ... [2024-11-19 17:10:48,370 INFO L112 eAbstractionObserver]: Analyzing ICFG sina1.c [2024-11-19 17:10:48,421 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 17:10:48,421 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 17:10:48,583 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 17:10:48,600 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2a242aca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 17:10:48,601 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 17:10:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 17:10:48,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:48,635 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:48,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:48,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2024-11-19 17:10:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:48,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610443371] [2024-11-19 17:10:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:48,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610443371] [2024-11-19 17:10:48,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610443371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:10:48,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:10:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 17:10:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655085840] [2024-11-19 17:10:48,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:10:48,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 17:10:48,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 17:10:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:10:48,976 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:49,000 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-19 17:10:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 17:10:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-19 17:10:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:49,021 INFO L225 Difference]: With dead ends: 38 [2024-11-19 17:10:49,021 INFO L226 Difference]: Without dead ends: 17 [2024-11-19 17:10:49,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:10:49,031 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:49,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:10:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-19 17:10:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-19 17:10:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-19 17:10:49,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-19 17:10:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:49,073 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-19 17:10:49,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-19 17:10:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 17:10:49,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:49,075 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:49,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 17:10:49,076 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:49,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2024-11-19 17:10:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:49,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076355991] [2024-11-19 17:10:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:49,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076355991] [2024-11-19 17:10:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076355991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:10:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:10:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 17:10:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691480304] [2024-11-19 17:10:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:10:49,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 17:10:49,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 17:10:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:10:49,477 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:49,554 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-19 17:10:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 17:10:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-19 17:10:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:49,557 INFO L225 Difference]: With dead ends: 37 [2024-11-19 17:10:49,557 INFO L226 Difference]: Without dead ends: 27 [2024-11-19 17:10:49,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:10:49,559 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:49,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:10:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-19 17:10:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-19 17:10:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-19 17:10:49,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2024-11-19 17:10:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:49,572 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-19 17:10:49,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-19 17:10:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 17:10:49,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:49,574 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:49,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 17:10:49,574 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:49,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2024-11-19 17:10:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:49,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576319662] [2024-11-19 17:10:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:49,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576319662] [2024-11-19 17:10:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576319662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:50,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118823947] [2024-11-19 17:10:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:50,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:50,906 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) [2024-11-19 17:10:50,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 17:10:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:51,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 17:10:51,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:51,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:51,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:51,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:51,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:51,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-19 17:10:51,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-19 17:10:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118823947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:51,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-19 17:10:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720288741] [2024-11-19 17:10:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:51,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 17:10:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 17:10:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-19 17:10:51,787 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:52,330 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2024-11-19 17:10:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 17:10:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-19 17:10:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:52,332 INFO L225 Difference]: With dead ends: 40 [2024-11-19 17:10:52,332 INFO L226 Difference]: Without dead ends: 38 [2024-11-19 17:10:52,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2024-11-19 17:10:52,334 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:52,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 97 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:10:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-19 17:10:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2024-11-19 17:10:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-19 17:10:52,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2024-11-19 17:10:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:52,347 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-19 17:10:52,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-19 17:10:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-19 17:10:52,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:52,348 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:52,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:52,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:52,553 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:52,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2024-11-19 17:10:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:52,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577189093] [2024-11-19 17:10:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577189093] [2024-11-19 17:10:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577189093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:52,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363623387] [2024-11-19 17:10:52,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:10:52,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:52,700 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) [2024-11-19 17:10:52,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 17:10:52,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:10:52,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:52,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:10:52,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:52,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:52,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363623387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:52,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:52,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:10:52,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610171542] [2024-11-19 17:10:52,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:52,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:10:52,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:10:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:10:52,997 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:53,209 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2024-11-19 17:10:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 17:10:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-19 17:10:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:53,211 INFO L225 Difference]: With dead ends: 58 [2024-11-19 17:10:53,211 INFO L226 Difference]: Without dead ends: 51 [2024-11-19 17:10:53,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-19 17:10:53,212 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:53,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 61 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:10:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-19 17:10:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2024-11-19 17:10:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-19 17:10:53,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2024-11-19 17:10:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:53,221 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-19 17:10:53,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-19 17:10:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 17:10:53,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:53,222 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:53,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 17:10:53,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 17:10:53,423 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:53,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2024-11-19 17:10:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:53,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762952475] [2024-11-19 17:10:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:10:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762952475] [2024-11-19 17:10:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762952475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246259477] [2024-11-19 17:10:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:53,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:53,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:53,525 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) [2024-11-19 17:10:53,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 17:10:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:53,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:10:53,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:10:53,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:10:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246259477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:53,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:10:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893964703] [2024-11-19 17:10:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:53,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:10:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:10:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:10:53,794 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:53,935 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-11-19 17:10:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 17:10:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-19 17:10:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:53,939 INFO L225 Difference]: With dead ends: 58 [2024-11-19 17:10:53,939 INFO L226 Difference]: Without dead ends: 37 [2024-11-19 17:10:53,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-19 17:10:53,941 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:53,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:10:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-19 17:10:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2024-11-19 17:10:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-19 17:10:53,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2024-11-19 17:10:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:53,957 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-19 17:10:53,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-19 17:10:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 17:10:53,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:53,958 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:53,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:54,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:54,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:54,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2024-11-19 17:10:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670571293] [2024-11-19 17:10:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670571293] [2024-11-19 17:10:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670571293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441272478] [2024-11-19 17:10:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:10:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:54,860 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) [2024-11-19 17:10:54,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 17:10:54,929 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 17:10:54,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:54,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 17:10:54,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:55,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:55,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:55,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:10:55,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:10:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:10:55,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:10:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:55,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:55,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-19 17:10:55,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2024-11-19 17:10:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:10:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441272478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:56,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 38 [2024-11-19 17:10:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990602534] [2024-11-19 17:10:56,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:56,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 17:10:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 17:10:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 17:10:56,038 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:10:58,331 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= (mod c_~N~0 4294967296) 536870911) (forall ((v_ArrVal_115 Int)) (= c_~N~0 (select (store .cse0 .cse1 v_ArrVal_115) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= c_~N~0 (select .cse0 .cse1)) (= (select (select |c_#memory_int#3| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_50| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_50| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_115 Int)) (= c_~N~0 (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_50| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_115) |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2024-11-19 17:11:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:02,011 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2024-11-19 17:11:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-19 17:11:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-19 17:11:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:02,013 INFO L225 Difference]: With dead ends: 101 [2024-11-19 17:11:02,015 INFO L226 Difference]: Without dead ends: 89 [2024-11-19 17:11:02,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=746, Invalid=4087, Unknown=1, NotChecked=136, Total=4970 [2024-11-19 17:11:02,022 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 249 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:02,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 145 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 430 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2024-11-19 17:11:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-19 17:11:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2024-11-19 17:11:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-11-19 17:11:02,058 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 20 [2024-11-19 17:11:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:02,058 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-11-19 17:11:02,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-11-19 17:11:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 17:11:02,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:02,065 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:02,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 17:11:02,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:02,266 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:02,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2024-11-19 17:11:02,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129311090] [2024-11-19 17:11:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:02,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:02,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129311090] [2024-11-19 17:11:02,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129311090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:02,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300392291] [2024-11-19 17:11:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:11:02,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:02,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:02,933 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) [2024-11-19 17:11:02,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 17:11:03,004 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:11:03,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:03,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 17:11:03,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:03,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:03,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:03,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:03,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:03,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-19 17:11:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:03,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:03,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2024-11-19 17:11:03,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2024-11-19 17:11:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:04,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300392291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:04,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:04,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2024-11-19 17:11:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744001069] [2024-11-19 17:11:04,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:04,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 17:11:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 17:11:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 17:11:04,545 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:05,376 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-11-19 17:11:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 17:11:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-19 17:11:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:05,378 INFO L225 Difference]: With dead ends: 75 [2024-11-19 17:11:05,378 INFO L226 Difference]: Without dead ends: 60 [2024-11-19 17:11:05,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2024-11-19 17:11:05,380 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:05,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:11:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-19 17:11:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2024-11-19 17:11:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-11-19 17:11:05,393 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 24 [2024-11-19 17:11:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:05,394 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-11-19 17:11:05,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-11-19 17:11:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 17:11:05,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:05,395 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:05,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 17:11:05,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:05,596 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:05,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 149788298, now seen corresponding path program 3 times [2024-11-19 17:11:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435804970] [2024-11-19 17:11:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 17:11:05,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:05,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435804970] [2024-11-19 17:11:05,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435804970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:05,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772736414] [2024-11-19 17:11:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:11:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:05,707 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) [2024-11-19 17:11:05,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 17:11:05,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 17:11:05,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:05,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 17:11:05,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:05,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-19 17:11:05,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-19 17:11:05,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2024-11-19 17:11:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:06,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:06,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2024-11-19 17:11:06,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-11-19 17:11:06,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:06,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 143 [2024-11-19 17:11:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:06,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772736414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:06,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:06,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 27 [2024-11-19 17:11:06,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819147358] [2024-11-19 17:11:06,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:06,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 17:11:06,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 17:11:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-11-19 17:11:06,241 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:06,759 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2024-11-19 17:11:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 17:11:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-19 17:11:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:06,760 INFO L225 Difference]: With dead ends: 71 [2024-11-19 17:11:06,760 INFO L226 Difference]: Without dead ends: 61 [2024-11-19 17:11:06,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2024-11-19 17:11:06,761 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:06,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 134 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:11:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-19 17:11:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2024-11-19 17:11:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-11-19 17:11:06,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 26 [2024-11-19 17:11:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:06,773 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-11-19 17:11:06,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-11-19 17:11:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 17:11:06,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:06,774 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:06,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 17:11:06,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:06,979 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:06,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 4 times [2024-11-19 17:11:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:06,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598619354] [2024-11-19 17:11:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:08,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598619354] [2024-11-19 17:11:08,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598619354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133393104] [2024-11-19 17:11:08,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:11:08,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:08,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:08,146 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) [2024-11-19 17:11:08,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 17:11:08,237 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:11:08,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:08,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 17:11:08,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:08,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:08,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:08,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:08,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:08,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:08,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:08,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:11:08,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:11:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:11:08,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:11:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:11:08,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:11:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:09,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:09,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2024-11-19 17:11:09,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 846 treesize of output 838 [2024-11-19 17:11:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:10,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133393104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:10,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:10,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 57 [2024-11-19 17:11:10,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166313744] [2024-11-19 17:11:10,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:10,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-19 17:11:10,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-19 17:11:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 17:11:10,049 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:15,234 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2024-11-19 17:11:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-19 17:11:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-19 17:11:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:15,237 INFO L225 Difference]: With dead ends: 152 [2024-11-19 17:11:15,237 INFO L226 Difference]: Without dead ends: 139 [2024-11-19 17:11:15,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1186, Invalid=7744, Unknown=0, NotChecked=0, Total=8930 [2024-11-19 17:11:15,242 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 475 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 151 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:15,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 512 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1371 Invalid, 2 Unknown, 0 Unchecked, 2.7s Time] [2024-11-19 17:11:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-19 17:11:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 51. [2024-11-19 17:11:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-19 17:11:15,268 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2024-11-19 17:11:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:15,268 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-19 17:11:15,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-19 17:11:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 17:11:15,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:15,269 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:15,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 17:11:15,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:15,470 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:15,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 629823694, now seen corresponding path program 5 times [2024-11-19 17:11:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:15,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845538304] [2024-11-19 17:11:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845538304] [2024-11-19 17:11:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845538304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980967027] [2024-11-19 17:11:15,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:11:15,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:15,603 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) [2024-11-19 17:11:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 17:11:15,688 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 17:11:15,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:15,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 17:11:15,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:15,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:15,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980967027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:15,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-19 17:11:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908580017] [2024-11-19 17:11:15,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:15,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 17:11:15,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:15,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 17:11:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:11:15,874 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:16,242 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2024-11-19 17:11:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 17:11:16,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-19 17:11:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:16,243 INFO L225 Difference]: With dead ends: 132 [2024-11-19 17:11:16,243 INFO L226 Difference]: Without dead ends: 119 [2024-11-19 17:11:16,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 17:11:16,244 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 137 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:16,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 326 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:11:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-19 17:11:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 55. [2024-11-19 17:11:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-19 17:11:16,261 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 28 [2024-11-19 17:11:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:16,261 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-19 17:11:16,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-19 17:11:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 17:11:16,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:16,262 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:16,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:16,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 17:11:16,463 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:16,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 4 times [2024-11-19 17:11:16,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:16,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789866897] [2024-11-19 17:11:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789866897] [2024-11-19 17:11:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789866897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695836297] [2024-11-19 17:11:17,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:11:17,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:17,299 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) [2024-11-19 17:11:17,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 17:11:17,366 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:11:17,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:17,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 17:11:17,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:17,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-19 17:11:17,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-11-19 17:11:17,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2024-11-19 17:11:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:17,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:17,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2024-11-19 17:11:17,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-19 17:11:17,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:17,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 135 [2024-11-19 17:11:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695836297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:17,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:17,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 38 [2024-11-19 17:11:17,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786952010] [2024-11-19 17:11:17,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:17,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 17:11:17,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 17:11:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 17:11:17,888 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:18,690 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2024-11-19 17:11:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-19 17:11:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-19 17:11:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:18,691 INFO L225 Difference]: With dead ends: 130 [2024-11-19 17:11:18,691 INFO L226 Difference]: Without dead ends: 128 [2024-11-19 17:11:18,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=2682, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 17:11:18,693 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 184 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:18,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 241 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 17:11:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-19 17:11:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2024-11-19 17:11:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-19 17:11:18,712 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 32 [2024-11-19 17:11:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:18,712 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-19 17:11:18,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-19 17:11:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 17:11:18,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:18,713 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:18,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:18,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:18,916 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:18,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1112184374, now seen corresponding path program 6 times [2024-11-19 17:11:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476156969] [2024-11-19 17:11:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:20,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:20,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476156969] [2024-11-19 17:11:20,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476156969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:20,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395183967] [2024-11-19 17:11:20,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:11:20,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:20,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:20,164 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) [2024-11-19 17:11:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 17:11:20,270 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-19 17:11:20,270 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:20,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-19 17:11:20,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:20,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:20,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:20,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:20,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:20,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:20,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:20,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:20,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:11:20,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:11:20,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:11:20,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 17:11:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:20,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:21,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2024-11-19 17:11:21,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19122 treesize of output 19058 [2024-11-19 17:11:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395183967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:21,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:21,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 22] total 63 [2024-11-19 17:11:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298289016] [2024-11-19 17:11:21,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:21,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-19 17:11:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-19 17:11:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2024-11-19 17:11:21,738 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:23,496 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2024-11-19 17:11:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-19 17:11:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-19 17:11:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:23,497 INFO L225 Difference]: With dead ends: 168 [2024-11-19 17:11:23,497 INFO L226 Difference]: Without dead ends: 150 [2024-11-19 17:11:23,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=903, Invalid=8409, Unknown=0, NotChecked=0, Total=9312 [2024-11-19 17:11:23,499 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 289 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:23,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 786 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 17:11:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-19 17:11:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2024-11-19 17:11:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-11-19 17:11:23,531 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 32 [2024-11-19 17:11:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:23,531 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-11-19 17:11:23,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-11-19 17:11:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 17:11:23,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:23,537 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:23,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 17:11:23,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 17:11:23,744 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:23,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash -831401164, now seen corresponding path program 5 times [2024-11-19 17:11:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58398438] [2024-11-19 17:11:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58398438] [2024-11-19 17:11:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58398438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:23,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972066787] [2024-11-19 17:11:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:11:23,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:23,884 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) [2024-11-19 17:11:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 17:11:23,971 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 17:11:23,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:23,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:11:23,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:24,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:11:24,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972066787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:24,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:24,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:11:24,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689244025] [2024-11-19 17:11:24,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:24,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:11:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:11:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:11:24,144 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:24,292 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2024-11-19 17:11:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 17:11:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-19 17:11:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:24,293 INFO L225 Difference]: With dead ends: 152 [2024-11-19 17:11:24,293 INFO L226 Difference]: Without dead ends: 111 [2024-11-19 17:11:24,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:11:24,294 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:24,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 85 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:11:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-19 17:11:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2024-11-19 17:11:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-19 17:11:24,328 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 36 [2024-11-19 17:11:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:24,329 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-19 17:11:24,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-19 17:11:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 17:11:24,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:24,331 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:24,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 17:11:24,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 17:11:24,532 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:24,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash -835467152, now seen corresponding path program 6 times [2024-11-19 17:11:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:24,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180727186] [2024-11-19 17:11:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:25,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180727186] [2024-11-19 17:11:25,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180727186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947603045] [2024-11-19 17:11:25,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:11:25,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:25,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:25,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 17:11:25,587 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 17:11:25,587 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:25,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 17:11:25,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:25,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:25,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:25,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:25,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:25,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:25,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 17:11:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:26,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:26,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-19 17:11:26,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 17:11:26,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-19 17:11:26,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 17:11:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947603045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:26,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:26,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 52 [2024-11-19 17:11:26,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835002726] [2024-11-19 17:11:26,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:26,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-19 17:11:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-19 17:11:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2024-11-19 17:11:26,649 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:28,048 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2024-11-19 17:11:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-19 17:11:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-19 17:11:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:28,049 INFO L225 Difference]: With dead ends: 167 [2024-11-19 17:11:28,049 INFO L226 Difference]: Without dead ends: 165 [2024-11-19 17:11:28,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1053, Invalid=6429, Unknown=0, NotChecked=0, Total=7482 [2024-11-19 17:11:28,051 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 270 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:28,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 306 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 17:11:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-19 17:11:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2024-11-19 17:11:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 126 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2024-11-19 17:11:28,090 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 40 [2024-11-19 17:11:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:28,090 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2024-11-19 17:11:28,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2024-11-19 17:11:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 17:11:28,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:28,091 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:28,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 17:11:28,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 17:11:28,292 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:28,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2034440074, now seen corresponding path program 7 times [2024-11-19 17:11:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583298242] [2024-11-19 17:11:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 17:11:28,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:28,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583298242] [2024-11-19 17:11:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583298242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565472443] [2024-11-19 17:11:28,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:11:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:28,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 17:11:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:28,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 17:11:28,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 17:11:28,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 17:11:28,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565472443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:28,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:28,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2024-11-19 17:11:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504328618] [2024-11-19 17:11:28,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:28,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 17:11:28,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 17:11:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2024-11-19 17:11:28,770 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:28,948 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2024-11-19 17:11:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 17:11:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-19 17:11:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:28,949 INFO L225 Difference]: With dead ends: 187 [2024-11-19 17:11:28,949 INFO L226 Difference]: Without dead ends: 107 [2024-11-19 17:11:28,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-19 17:11:28,950 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:28,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 130 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:11:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-19 17:11:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 81. [2024-11-19 17:11:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.075) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-11-19 17:11:28,973 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 40 [2024-11-19 17:11:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:28,973 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-11-19 17:11:28,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-11-19 17:11:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 17:11:28,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:28,974 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:28,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:29,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 17:11:29,175 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:29,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -949375060, now seen corresponding path program 8 times [2024-11-19 17:11:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:29,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444587118] [2024-11-19 17:11:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444587118] [2024-11-19 17:11:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444587118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640044060] [2024-11-19 17:11:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:11:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:30,286 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:30,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 17:11:30,368 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:11:30,368 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:30,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-19 17:11:30,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:30,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:30,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:30,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:30,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:30,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:30,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:30,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:11:30,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:11:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:30,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:31,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-19 17:11:31,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2024-11-19 17:11:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 17:11:31,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640044060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:31,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:31,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 19] total 58 [2024-11-19 17:11:31,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897800] [2024-11-19 17:11:31,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:31,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-19 17:11:31,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-19 17:11:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2024-11-19 17:11:31,712 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:35,855 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((v_ArrVal_595 Int)) (= c_~N~0 (select (store .cse0 .cse1 v_ArrVal_595) .cse2))) (= c_~N~0 (select .cse0 .cse1)) (= (select (select |c_#memory_int#3| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_222| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_222| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_595 Int)) (= (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_222| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_595) .cse2) c_~N~0)))))) is different from false [2024-11-19 17:11:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:36,548 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2024-11-19 17:11:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-19 17:11:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-19 17:11:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:36,549 INFO L225 Difference]: With dead ends: 119 [2024-11-19 17:11:36,549 INFO L226 Difference]: Without dead ends: 117 [2024-11-19 17:11:36,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=801, Invalid=8706, Unknown=3, NotChecked=192, Total=9702 [2024-11-19 17:11:36,555 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 54 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:36,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 419 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1257 Invalid, 4 Unknown, 55 Unchecked, 2.7s Time] [2024-11-19 17:11:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-19 17:11:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2024-11-19 17:11:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-11-19 17:11:36,603 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 44 [2024-11-19 17:11:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:36,603 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-11-19 17:11:36,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-11-19 17:11:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 17:11:36,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:36,604 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:36,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 17:11:36,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:36,808 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:36,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1740648434, now seen corresponding path program 9 times [2024-11-19 17:11:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289971794] [2024-11-19 17:11:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:38,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:38,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289971794] [2024-11-19 17:11:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289971794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:38,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464258101] [2024-11-19 17:11:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:11:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:38,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:38,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 17:11:38,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 17:11:38,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:38,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-19 17:11:38,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:38,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 17:11:38,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 17:11:38,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 17:11:38,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 17:11:38,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-19 17:11:38,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-19 17:11:38,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-19 17:11:38,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-11-19 17:11:38,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:38,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2024-11-19 17:11:38,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:38,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2024-11-19 17:11:38,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:38,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2024-11-19 17:11:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:11:39,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:40,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2024-11-19 17:11:40,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:40,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380538 treesize of output 379258 [2024-11-19 17:11:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:11:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464258101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:40,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:40,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 22] total 66 [2024-11-19 17:11:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570356153] [2024-11-19 17:11:40,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:40,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-19 17:11:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-19 17:11:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=3820, Unknown=0, NotChecked=0, Total=4290 [2024-11-19 17:11:40,763 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 66 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 66 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:49,468 INFO L93 Difference]: Finished difference Result 285 states and 312 transitions. [2024-11-19 17:11:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-19 17:11:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 66 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-19 17:11:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:49,470 INFO L225 Difference]: With dead ends: 285 [2024-11-19 17:11:49,470 INFO L226 Difference]: Without dead ends: 264 [2024-11-19 17:11:49,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6756 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3499, Invalid=20371, Unknown=0, NotChecked=0, Total=23870 [2024-11-19 17:11:49,475 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 866 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:49,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 615 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-19 17:11:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-19 17:11:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 134. [2024-11-19 17:11:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.112781954887218) internal successors, (148), 133 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2024-11-19 17:11:49,519 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 44 [2024-11-19 17:11:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:49,519 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2024-11-19 17:11:49,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 66 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2024-11-19 17:11:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 17:11:49,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:49,520 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:49,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:49,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 17:11:49,721 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:49,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1621255262, now seen corresponding path program 10 times [2024-11-19 17:11:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241007804] [2024-11-19 17:11:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:49,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:50,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241007804] [2024-11-19 17:11:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241007804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039271159] [2024-11-19 17:11:50,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:11:50,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:50,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:50,813 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:50,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 17:11:50,897 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:11:50,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:50,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-19 17:11:50,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:50,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-19 17:11:50,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2024-11-19 17:11:51,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:51,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2024-11-19 17:11:51,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:51,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2024-11-19 17:11:51,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-19 17:11:51,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:51,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2024-11-19 17:11:51,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:51,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 26 [2024-11-19 17:11:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 17:11:51,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:52,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 93 [2024-11-19 17:11:52,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2024-11-19 17:11:52,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:11:52,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97406 treesize of output 93310 [2024-11-19 17:11:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 17:11:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039271159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:52,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 20] total 61 [2024-11-19 17:11:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780540967] [2024-11-19 17:11:52,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:52,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-19 17:11:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-19 17:11:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2024-11-19 17:11:52,454 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 61 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 61 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:55,812 INFO L93 Difference]: Finished difference Result 332 states and 357 transitions. [2024-11-19 17:11:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-19 17:11:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 61 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-19 17:11:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:55,813 INFO L225 Difference]: With dead ends: 332 [2024-11-19 17:11:55,813 INFO L226 Difference]: Without dead ends: 299 [2024-11-19 17:11:55,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1092, Invalid=10038, Unknown=0, NotChecked=0, Total=11130 [2024-11-19 17:11:55,815 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 364 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:55,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 482 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 17:11:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-19 17:11:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 154. [2024-11-19 17:11:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.130718954248366) internal successors, (173), 153 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 173 transitions. [2024-11-19 17:11:55,888 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 173 transitions. Word has length 48 [2024-11-19 17:11:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:55,888 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 173 transitions. [2024-11-19 17:11:55,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 61 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 173 transitions. [2024-11-19 17:11:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-19 17:11:55,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:55,889 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:55,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:56,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 17:11:56,089 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:56,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1923182178, now seen corresponding path program 11 times [2024-11-19 17:11:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924713520] [2024-11-19 17:11:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 17:11:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924713520] [2024-11-19 17:11:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924713520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095585700] [2024-11-19 17:11:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:11:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:56,368 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 17:11:56,585 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-19 17:11:56,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:56,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 17:11:56,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 17:11:56,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:11:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 17:11:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095585700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:11:56,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:11:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-19 17:11:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653202464] [2024-11-19 17:11:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:11:56,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 17:11:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:11:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 17:11:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-11-19 17:11:56,976 INFO L87 Difference]: Start difference. First operand 154 states and 173 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:11:57,334 INFO L93 Difference]: Finished difference Result 321 states and 351 transitions. [2024-11-19 17:11:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 17:11:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-19 17:11:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:11:57,335 INFO L225 Difference]: With dead ends: 321 [2024-11-19 17:11:57,335 INFO L226 Difference]: Without dead ends: 216 [2024-11-19 17:11:57,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 17:11:57,336 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 216 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:11:57,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 142 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:11:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-19 17:11:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2024-11-19 17:11:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1075949367088607) internal successors, (175), 158 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2024-11-19 17:11:57,421 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 54 [2024-11-19 17:11:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:11:57,421 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2024-11-19 17:11:57,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:11:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2024-11-19 17:11:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 17:11:57,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:11:57,422 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:11:57,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 17:11:57,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:57,627 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:11:57,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:11:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1307867604, now seen corresponding path program 12 times [2024-11-19 17:11:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:11:57,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599706034] [2024-11-19 17:11:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:11:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:11:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:11:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:11:58,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:11:58,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599706034] [2024-11-19 17:11:58,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599706034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:11:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43723358] [2024-11-19 17:11:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:11:58,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:11:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:11:58,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:11:58,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 17:11:59,072 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-19 17:11:59,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:11:59,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 17:11:59,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:11:59,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:11:59,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:11:59,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-19 17:12:00,006 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 17:12:00,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2024-11-19 17:12:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 45 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:12:00,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:12:00,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-19 17:12:00,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-19 17:12:00,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-19 17:12:00,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-19 17:12:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 40 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:12:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43723358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:12:01,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:12:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25, 25] total 69 [2024-11-19 17:12:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763072454] [2024-11-19 17:12:01,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:12:01,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-19 17:12:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:12:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-19 17:12:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=4256, Unknown=0, NotChecked=0, Total=4692 [2024-11-19 17:12:01,082 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:12:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:12:03,143 INFO L93 Difference]: Finished difference Result 239 states and 254 transitions. [2024-11-19 17:12:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-19 17:12:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-19 17:12:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:12:03,144 INFO L225 Difference]: With dead ends: 239 [2024-11-19 17:12:03,144 INFO L226 Difference]: Without dead ends: 175 [2024-11-19 17:12:03,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1179, Invalid=10163, Unknown=0, NotChecked=0, Total=11342 [2024-11-19 17:12:03,145 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:12:03,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 511 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:12:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-19 17:12:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 143. [2024-11-19 17:12:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.091549295774648) internal successors, (155), 142 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:12:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2024-11-19 17:12:03,206 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 56 [2024-11-19 17:12:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:12:03,206 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2024-11-19 17:12:03,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 17:12:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2024-11-19 17:12:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 17:12:03,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:12:03,206 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:12:03,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 17:12:03,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:12:03,407 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:12:03,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:12:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1368461664, now seen corresponding path program 13 times [2024-11-19 17:12:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:12:03,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414642360] [2024-11-19 17:12:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:12:03,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:12:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:12:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:12:05,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:12:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414642360] [2024-11-19 17:12:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414642360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:12:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938084547] [2024-11-19 17:12:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:12:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:12:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:12:05,074 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:12:05,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 17:12:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:12:05,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-19 17:12:05,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:12:05,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:12:05,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 17:12:05,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 17:12:05,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:12:05,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:12:05,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:12:05,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:12:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:12:06,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:12:06,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:12:06,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:12:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:12:06,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:12:07,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-19 17:12:07,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2024-11-19 17:12:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 88 refuted. 2 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-19 17:12:08,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938084547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:12:08,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:12:08,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 21] total 77 [2024-11-19 17:12:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513134181] [2024-11-19 17:12:08,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:12:08,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-19 17:12:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:12:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-19 17:12:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=5405, Unknown=2, NotChecked=0, Total=5852 [2024-11-19 17:12:08,254 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 77 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)