./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-patterns/array4_pattern.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-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 17:00:27,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 17:00:27,191 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 17:00:27,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 17:00:27,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 17:00:27,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 17:00:27,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 17:00:27,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 17:00:27,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 17:00:27,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 17:00:27,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 17:00:27,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 17:00:27,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 17:00:27,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 17:00:27,227 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 17:00:27,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 17:00:27,229 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 17:00:27,231 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 17:00:27,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 17:00:27,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 17:00:27,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 17:00:27,234 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 17:00:27,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 17:00:27,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 17:00:27,234 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 17:00:27,235 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 17:00:27,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 17:00:27,235 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 17:00:27,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 17:00:27,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 17:00:27,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 17:00:27,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 17:00:27,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:00:27,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 17:00:27,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 17:00:27,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 17:00:27,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 17:00:27,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 17:00:27,240 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 17:00:27,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 17:00:27,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 17:00:27,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 17:00:27,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-19 17:00:27,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 17:00:27,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 17:00:27,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 17:00:27,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 17:00:27,573 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 17:00:27,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-19 17:00:28,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 17:00:29,166 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 17:00:29,166 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-19 17:00:29,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19221388c/918bd0ee8dea42ac8220084b140e46ed/FLAG97dcbff90 [2024-11-19 17:00:29,183 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19221388c/918bd0ee8dea42ac8220084b140e46ed [2024-11-19 17:00:29,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 17:00:29,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 17:00:29,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 17:00:29,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 17:00:29,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 17:00:29,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29, skipping insertion in model container [2024-11-19 17:00:29,197 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 17:00:29,393 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-patterns/array4_pattern.c[1835,1848] [2024-11-19 17:00:29,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:00:29,431 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 17:00:29,444 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-patterns/array4_pattern.c[1835,1848] [2024-11-19 17:00:29,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:00:29,476 INFO L204 MainTranslator]: Completed translation [2024-11-19 17:00:29,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29 WrapperNode [2024-11-19 17:00:29,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 17:00:29,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 17:00:29,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 17:00:29,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 17:00:29,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,491 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,514 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2024-11-19 17:00:29,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 17:00:29,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 17:00:29,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 17:00:29,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 17:00:29,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,552 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-19 17:00:29,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,564 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 17:00:29,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 17:00:29,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 17:00:29,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 17:00:29,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (1/1) ... [2024-11-19 17:00:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:00:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:29,604 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 17:00:29,607 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 17:00:29,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 17:00:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-19 17:00:29,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-19 17:00:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 17:00:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 17:00:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 17:00:29,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 17:00:29,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 17:00:29,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 17:00:29,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 17:00:29,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 17:00:29,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 17:00:29,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 17:00:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 17:00:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 17:00:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 17:00:29,715 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 17:00:29,718 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 17:00:29,896 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-19 17:00:29,896 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 17:00:29,907 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 17:00:29,907 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 17:00:29,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:29 BoogieIcfgContainer [2024-11-19 17:00:29,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 17:00:29,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 17:00:29,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 17:00:29,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 17:00:29,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:29" (1/3) ... [2024-11-19 17:00:29,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc091a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:29, skipping insertion in model container [2024-11-19 17:00:29,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:29" (2/3) ... [2024-11-19 17:00:29,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc091a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:29, skipping insertion in model container [2024-11-19 17:00:29,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:29" (3/3) ... [2024-11-19 17:00:29,918 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-19 17:00:29,932 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 17:00:29,932 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 17:00:29,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 17:00:29,993 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;@3e1e8526, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 17:00:29,994 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 17:00:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 17:00:30,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:30,004 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:30,004 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:30,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -895237295, now seen corresponding path program 1 times [2024-11-19 17:00:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093808157] [2024-11-19 17:00:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,174 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 17:00:30,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:30,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093808157] [2024-11-19 17:00:30,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093808157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:00:30,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:00:30,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 17:00:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841676981] [2024-11-19 17:00:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:00:30,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 17:00:30,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 17:00:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:00:30,206 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 17:00:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:30,222 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2024-11-19 17:00:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 17:00:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-19 17:00:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:30,229 INFO L225 Difference]: With dead ends: 63 [2024-11-19 17:00:30,229 INFO L226 Difference]: Without dead ends: 29 [2024-11-19 17:00:30,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 17:00:30,235 INFO L432 NwaCegarLoop]: 40 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, 40 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 17:00:30,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:00:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-19 17:00:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-19 17:00:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-19 17:00:30,264 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2024-11-19 17:00:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:30,264 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-19 17:00:30,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 17:00:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-19 17:00:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 17:00:30,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:30,267 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:30,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 17:00:30,267 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:30,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1276668511, now seen corresponding path program 1 times [2024-11-19 17:00:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305834534] [2024-11-19 17:00:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 17:00:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 17:00:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 17:00:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:00:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:30,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305834534] [2024-11-19 17:00:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305834534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:00:30,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:00:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 17:00:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230252561] [2024-11-19 17:00:30,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:00:30,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 17:00:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 17:00:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 17:00:30,561 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:30,638 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2024-11-19 17:00:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 17:00:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-19 17:00:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:30,642 INFO L225 Difference]: With dead ends: 61 [2024-11-19 17:00:30,643 INFO L226 Difference]: Without dead ends: 39 [2024-11-19 17:00:30,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 17:00:30,645 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:30,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:00:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-19 17:00:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-19 17:00:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 17:00:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-19 17:00:30,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2024-11-19 17:00:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:30,666 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-19 17:00:30,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-19 17:00:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 17:00:30,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:30,668 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:30,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 17:00:30,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:30,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 467321885, now seen corresponding path program 1 times [2024-11-19 17:00:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263988748] [2024-11-19 17:00:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 17:00:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 17:00:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 17:00:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:00:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263988748] [2024-11-19 17:00:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263988748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:00:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:00:30,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 17:00:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186237984] [2024-11-19 17:00:30,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:00:30,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 17:00:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 17:00:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:00:30,962 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:30,981 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-11-19 17:00:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 17:00:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-19 17:00:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:30,984 INFO L225 Difference]: With dead ends: 43 [2024-11-19 17:00:30,984 INFO L226 Difference]: Without dead ends: 39 [2024-11-19 17:00:30,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:00:30,987 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:30,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:00:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-19 17:00:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-19 17:00:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 17:00:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-19 17:00:31,005 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2024-11-19 17:00:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:31,005 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-19 17:00:31,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-19 17:00:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 17:00:31,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:31,009 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:31,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 17:00:31,009 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:31,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1822000481, now seen corresponding path program 1 times [2024-11-19 17:00:31,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:31,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863744054] [2024-11-19 17:00:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 17:00:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-19 17:00:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 17:00:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:00:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863744054] [2024-11-19 17:00:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863744054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:00:31,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:00:31,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 17:00:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087633228] [2024-11-19 17:00:31,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:00:31,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 17:00:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 17:00:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 17:00:31,206 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:31,316 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2024-11-19 17:00:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 17:00:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-19 17:00:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:31,318 INFO L225 Difference]: With dead ends: 77 [2024-11-19 17:00:31,319 INFO L226 Difference]: Without dead ends: 43 [2024-11-19 17:00:31,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 17:00:31,321 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:31,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:00:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-19 17:00:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2024-11-19 17:00:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 17:00:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-11-19 17:00:31,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2024-11-19 17:00:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:31,337 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-11-19 17:00:31,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 17:00:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-11-19 17:00:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 17:00:31,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:31,341 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:31,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 17:00:31,341 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:31,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1436830497, now seen corresponding path program 1 times [2024-11-19 17:00:31,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279062843] [2024-11-19 17:00:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:00:31,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430875615] [2024-11-19 17:00:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:31,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:31,414 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 17:00:31,417 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 17:00:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:31,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 17:00:31,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:32,159 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 17:00:32,171 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 9 [2024-11-19 17:00:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:00:32,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:32,434 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 33 treesize of output 31 [2024-11-19 17:00:32,438 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 29 [2024-11-19 17:00:32,444 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 49 treesize of output 47 [2024-11-19 17:00:32,448 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 68 treesize of output 64 [2024-11-19 17:00:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 17:00:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279062843] [2024-11-19 17:00:33,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:00:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430875615] [2024-11-19 17:00:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430875615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:33,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 17:00:33,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-11-19 17:00:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931283202] [2024-11-19 17:00:33,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:33,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 17:00:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 17:00:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-11-19 17:00:33,108 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-19 17:00:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:34,306 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2024-11-19 17:00:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 17:00:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2024-11-19 17:00:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:34,308 INFO L225 Difference]: With dead ends: 131 [2024-11-19 17:00:34,308 INFO L226 Difference]: Without dead ends: 46 [2024-11-19 17:00:34,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2024-11-19 17:00:34,313 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:34,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 279 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:00:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-19 17:00:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-19 17:00:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 17:00:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-11-19 17:00:34,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 46 [2024-11-19 17:00:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:34,328 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-11-19 17:00:34,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-19 17:00:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-11-19 17:00:34,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 17:00:34,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:34,330 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:34,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 17:00:34,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:34,531 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:34,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2142241571, now seen corresponding path program 2 times [2024-11-19 17:00:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:34,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931161890] [2024-11-19 17:00:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 17:00:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 17:00:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 17:00:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 17:00:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:34,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931161890] [2024-11-19 17:00:34,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931161890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:34,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623295996] [2024-11-19 17:00:34,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:00:34,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:34,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:34,661 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 17:00:34,666 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 17:00:34,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:00:34,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:34,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:00:34,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:00:34,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623295996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:34,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:00:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:00:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6287769] [2024-11-19 17:00:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:34,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:00:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:00:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:00:34,902 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:35,026 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2024-11-19 17:00:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 17:00:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2024-11-19 17:00:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:35,029 INFO L225 Difference]: With dead ends: 85 [2024-11-19 17:00:35,029 INFO L226 Difference]: Without dead ends: 62 [2024-11-19 17:00:35,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-19 17:00:35,030 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:35,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 114 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:00:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-19 17:00:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-11-19 17:00:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 17:00:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-11-19 17:00:35,039 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 48 [2024-11-19 17:00:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:35,041 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-11-19 17:00:35,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-11-19 17:00:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 17:00:35,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:35,042 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:35,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 17:00:35,242 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,SelfDestructingSolverStorable5 [2024-11-19 17:00:35,243 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:35,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:35,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1458049061, now seen corresponding path program 3 times [2024-11-19 17:00:35,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97681553] [2024-11-19 17:00:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:35,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:00:35,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511387076] [2024-11-19 17:00:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:00:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:35,292 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 17:00:35,293 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 17:00:35,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 17:00:35,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:35,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-19 17:00:35,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:35,403 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 17:00:35,414 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 17:00:35,487 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 17:00:35,495 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 17:00:36,963 INFO L349 Elim1Store]: treesize reduction 152, result has 30.6 percent of original size [2024-11-19 17:00:36,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-11-19 17:00:37,111 INFO L349 Elim1Store]: treesize reduction 164, result has 29.0 percent of original size [2024-11-19 17:00:37,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-11-19 17:00:38,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:38,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2024-11-19 17:00:38,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:38,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 102 [2024-11-19 17:00:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 17:00:38,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:38,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:38,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97681553] [2024-11-19 17:00:38,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:00:38,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511387076] [2024-11-19 17:00:38,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511387076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:38,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 17:00:38,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-19 17:00:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236834165] [2024-11-19 17:00:38,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:38,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 17:00:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 17:00:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2024-11-19 17:00:38,838 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-19 17:00:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:39,671 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-11-19 17:00:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 17:00:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2024-11-19 17:00:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:39,673 INFO L225 Difference]: With dead ends: 86 [2024-11-19 17:00:39,673 INFO L226 Difference]: Without dead ends: 82 [2024-11-19 17:00:39,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 17:00:39,675 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:39,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 221 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:00:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-19 17:00:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2024-11-19 17:00:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 17:00:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2024-11-19 17:00:39,690 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 50 [2024-11-19 17:00:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:39,690 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2024-11-19 17:00:39,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-19 17:00:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2024-11-19 17:00:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 17:00:39,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:39,691 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:39,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 17:00:39,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:39,892 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:39,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1079043239, now seen corresponding path program 4 times [2024-11-19 17:00:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395729806] [2024-11-19 17:00:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 17:00:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 17:00:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 17:00:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 17:00:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395729806] [2024-11-19 17:00:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395729806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3922918] [2024-11-19 17:00:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:00:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:40,039 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 17:00:40,041 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 17:00:40,108 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:00:40,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:40,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 17:00:40,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:00:40,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3922918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:40,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:00:40,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 17:00:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517172341] [2024-11-19 17:00:40,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:40,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:00:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:00:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:00:40,270 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:40,462 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2024-11-19 17:00:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 17:00:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2024-11-19 17:00:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:40,463 INFO L225 Difference]: With dead ends: 199 [2024-11-19 17:00:40,464 INFO L226 Difference]: Without dead ends: 157 [2024-11-19 17:00:40,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-19 17:00:40,465 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:40,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 205 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:00:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-19 17:00:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2024-11-19 17:00:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-19 17:00:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2024-11-19 17:00:40,496 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 52 [2024-11-19 17:00:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:40,496 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2024-11-19 17:00:40,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2024-11-19 17:00:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-19 17:00:40,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:40,498 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:40,506 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 17:00:40,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:40,699 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:40,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1518277417, now seen corresponding path program 5 times [2024-11-19 17:00:40,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:40,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423187846] [2024-11-19 17:00:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:00:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702432201] [2024-11-19 17:00:40,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:00:40,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:40,742 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 17:00:40,743 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 17:00:40,835 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 17:00:40,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:40,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-19 17:00:40,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:40,905 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 17:00:40,913 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 17:00:40,981 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 17:00:40,989 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 17:00:41,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:41,108 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 26 treesize of output 28 [2024-11-19 17:00:41,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:41,118 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 26 treesize of output 28 [2024-11-19 17:00:42,631 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2024-11-19 17:00:42,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-11-19 17:00:42,722 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2024-11-19 17:00:42,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-11-19 17:00:43,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:43,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 58 [2024-11-19 17:00:43,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:43,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 80 [2024-11-19 17:00:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:00:43,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423187846] [2024-11-19 17:00:44,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:00:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702432201] [2024-11-19 17:00:44,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702432201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:44,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 17:00:44,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-11-19 17:00:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931704014] [2024-11-19 17:00:44,380 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:44,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 17:00:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 17:00:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2024-11-19 17:00:44,382 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:46,112 INFO L93 Difference]: Finished difference Result 182 states and 230 transitions. [2024-11-19 17:00:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 17:00:46,112 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2024-11-19 17:00:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:46,114 INFO L225 Difference]: With dead ends: 182 [2024-11-19 17:00:46,114 INFO L226 Difference]: Without dead ends: 178 [2024-11-19 17:00:46,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=372, Invalid=3168, Unknown=0, NotChecked=0, Total=3540 [2024-11-19 17:00:46,116 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:46,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 288 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 17:00:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-19 17:00:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2024-11-19 17:00:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 states have internal predecessors, (131), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-19 17:00:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2024-11-19 17:00:46,153 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 54 [2024-11-19 17:00:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:46,153 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2024-11-19 17:00:46,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2024-11-19 17:00:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 17:00:46,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:46,155 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:46,163 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 17:00:46,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:46,356 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:46,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1171048789, now seen corresponding path program 6 times [2024-11-19 17:00:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102922644] [2024-11-19 17:00:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-19 17:00:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 17:00:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:00:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 17:00:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:46,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102922644] [2024-11-19 17:00:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102922644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463680072] [2024-11-19 17:00:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:00:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:46,507 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 17:00:46,511 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 17:00:46,659 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-19 17:00:46,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:46,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:00:46,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:00:46,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:46,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463680072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:46,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:00:46,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:00:46,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241946224] [2024-11-19 17:00:46,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:46,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:00:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:00:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:00:46,829 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:47,104 INFO L93 Difference]: Finished difference Result 359 states and 469 transitions. [2024-11-19 17:00:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 17:00:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-11-19 17:00:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:47,109 INFO L225 Difference]: With dead ends: 359 [2024-11-19 17:00:47,110 INFO L226 Difference]: Without dead ends: 261 [2024-11-19 17:00:47,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 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 17:00:47,113 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 121 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:47,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 229 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:00:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-19 17:00:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 234. [2024-11-19 17:00:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 165 states have (on average 1.1272727272727272) internal successors, (186), 165 states have internal predecessors, (186), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-19 17:00:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2024-11-19 17:00:47,177 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 56 [2024-11-19 17:00:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:47,180 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2024-11-19 17:00:47,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2024-11-19 17:00:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 17:00:47,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:47,181 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:47,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 17:00:47,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:47,382 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:47,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1579439829, now seen corresponding path program 7 times [2024-11-19 17:00:47,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139546424] [2024-11-19 17:00:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-19 17:00:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 17:00:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-19 17:00:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 17:00:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139546424] [2024-11-19 17:00:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139546424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610727632] [2024-11-19 17:00:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:00:47,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:47,566 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 17:00:47,568 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 17:00:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:47,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:00:47,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:00:47,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610727632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:47,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:00:47,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:00:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781129503] [2024-11-19 17:00:47,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:47,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:00:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:00:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:00:47,853 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:48,234 INFO L93 Difference]: Finished difference Result 260 states and 334 transitions. [2024-11-19 17:00:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 17:00:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-11-19 17:00:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:48,238 INFO L225 Difference]: With dead ends: 260 [2024-11-19 17:00:48,238 INFO L226 Difference]: Without dead ends: 256 [2024-11-19 17:00:48,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-19 17:00:48,239 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:48,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 435 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:00:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-19 17:00:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 231. [2024-11-19 17:00:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 162 states have (on average 1.123456790123457) internal successors, (182), 163 states have internal predecessors, (182), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-19 17:00:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2024-11-19 17:00:48,282 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 56 [2024-11-19 17:00:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:48,282 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2024-11-19 17:00:48,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2024-11-19 17:00:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 17:00:48,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:48,284 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:48,292 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 17:00:48,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:48,489 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:48,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1664986067, now seen corresponding path program 8 times [2024-11-19 17:00:48,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:48,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001109471] [2024-11-19 17:00:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:48,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:00:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024765494] [2024-11-19 17:00:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:00:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:48,531 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 17:00:48,532 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 17:00:48,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:00:48,648 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:48,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-19 17:00:48,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:48,678 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 17:00:48,684 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 17:00:48,731 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 17:00:48,737 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 17:00:48,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:48,809 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 26 treesize of output 28 [2024-11-19 17:00:48,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:48,823 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 26 treesize of output 28 [2024-11-19 17:00:48,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:48,912 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 33 treesize of output 38 [2024-11-19 17:00:48,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:48,926 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 33 treesize of output 38 [2024-11-19 17:00:50,536 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2024-11-19 17:00:50,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2024-11-19 17:00:50,695 INFO L349 Elim1Store]: treesize reduction 256, result has 25.8 percent of original size [2024-11-19 17:00:50,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 79 treesize of output 127 [2024-11-19 17:00:53,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:53,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 124 [2024-11-19 17:00:53,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:53,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 337 treesize of output 211 [2024-11-19 17:00:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 17:00:54,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:55,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:55,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001109471] [2024-11-19 17:00:55,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:00:55,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024765494] [2024-11-19 17:00:55,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024765494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:55,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 17:00:55,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-11-19 17:00:55,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147747636] [2024-11-19 17:00:55,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:55,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 17:00:55,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 17:00:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1796, Unknown=0, NotChecked=0, Total=2070 [2024-11-19 17:00:55,531 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 30 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:56,971 INFO L93 Difference]: Finished difference Result 260 states and 339 transitions. [2024-11-19 17:00:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 17:00:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2024-11-19 17:00:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:56,973 INFO L225 Difference]: With dead ends: 260 [2024-11-19 17:00:56,973 INFO L226 Difference]: Without dead ends: 256 [2024-11-19 17:00:56,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2024-11-19 17:00:56,974 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:56,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 339 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 17:00:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-19 17:00:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 238. [2024-11-19 17:00:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 169 states have internal predecessors, (190), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-19 17:00:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 312 transitions. [2024-11-19 17:00:57,042 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 312 transitions. Word has length 58 [2024-11-19 17:00:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:57,043 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 312 transitions. [2024-11-19 17:00:57,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:00:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 312 transitions. [2024-11-19 17:00:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 17:00:57,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:57,044 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:57,053 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 17:00:57,248 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,SelfDestructingSolverStorable11 [2024-11-19 17:00:57,249 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:57,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:57,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2024425135, now seen corresponding path program 9 times [2024-11-19 17:00:57,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:57,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597394134] [2024-11-19 17:00:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:00:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-19 17:00:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 17:00:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-19 17:00:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 17:00:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:00:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:00:57,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597394134] [2024-11-19 17:00:57,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597394134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:00:57,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125142968] [2024-11-19 17:00:57,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:00:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:57,463 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 17:00:57,465 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 17:00:57,559 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-19 17:00:57,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:57,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 17:00:57,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:00:57,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:00:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:00:57,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125142968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:00:57,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:00:57,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-19 17:00:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466940515] [2024-11-19 17:00:57,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:00:57,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 17:00:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:00:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 17:00:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:00:57,751 INFO L87 Difference]: Start difference. First operand 238 states and 312 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:00:58,109 INFO L93 Difference]: Finished difference Result 575 states and 760 transitions. [2024-11-19 17:00:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 17:00:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2024-11-19 17:00:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:00:58,112 INFO L225 Difference]: With dead ends: 575 [2024-11-19 17:00:58,112 INFO L226 Difference]: Without dead ends: 395 [2024-11-19 17:00:58,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-19 17:00:58,114 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 293 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:00:58,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 269 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:00:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-19 17:00:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 353. [2024-11-19 17:00:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.1260162601626016) internal successors, (277), 246 states have internal predecessors, (277), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-19 17:00:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 471 transitions. [2024-11-19 17:00:58,205 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 471 transitions. Word has length 60 [2024-11-19 17:00:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:00:58,205 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 471 transitions. [2024-11-19 17:00:58,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:00:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 471 transitions. [2024-11-19 17:00:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 17:00:58,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:00:58,209 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:00:58,218 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 17:00:58,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 17:00:58,410 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:00:58,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:00:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash 462082865, now seen corresponding path program 10 times [2024-11-19 17:00:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:00:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905780513] [2024-11-19 17:00:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:00:58,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:00:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:00:58,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556656529] [2024-11-19 17:00:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:00:58,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:00:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:00:58,484 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 17:00:58,485 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 17:00:58,676 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:00:58,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:00:58,678 WARN L253 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-19 17:00:58,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:00:58,697 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 17:00:58,701 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 17:00:58,748 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 17:00:58,758 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 17:00:58,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:58,815 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 26 treesize of output 28 [2024-11-19 17:00:58,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:58,826 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 26 treesize of output 28 [2024-11-19 17:00:58,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:58,907 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 33 treesize of output 38 [2024-11-19 17:00:58,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:58,925 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 33 treesize of output 38 [2024-11-19 17:00:59,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:59,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-19 17:00:59,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:00:59,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-19 17:01:00,910 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2024-11-19 17:01:00,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2024-11-19 17:01:01,094 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2024-11-19 17:01:01,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2024-11-19 17:01:04,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:04,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 103 [2024-11-19 17:01:04,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:04,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 355 treesize of output 179 [2024-11-19 17:01:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:01:04,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905780513] [2024-11-19 17:01:06,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:01:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556656529] [2024-11-19 17:01:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556656529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:06,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 17:01:06,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-11-19 17:01:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224660816] [2024-11-19 17:01:06,798 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:06,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-19 17:01:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-19 17:01:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2872, Unknown=0, NotChecked=0, Total=3306 [2024-11-19 17:01:06,800 INFO L87 Difference]: Start difference. First operand 353 states and 471 transitions. Second operand has 36 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:01:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:08,429 INFO L93 Difference]: Finished difference Result 400 states and 527 transitions. [2024-11-19 17:01:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-19 17:01:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2024-11-19 17:01:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:08,432 INFO L225 Difference]: With dead ends: 400 [2024-11-19 17:01:08,432 INFO L226 Difference]: Without dead ends: 396 [2024-11-19 17:01:08,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=471, Invalid=3189, Unknown=0, NotChecked=0, Total=3660 [2024-11-19 17:01:08,435 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:08,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 434 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-19 17:01:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-19 17:01:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 374. [2024-11-19 17:01:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 262 states have (on average 1.1259541984732824) internal successors, (295), 262 states have internal predecessors, (295), 101 states have call successors, (101), 10 states have call predecessors, (101), 10 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2024-11-19 17:01:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 497 transitions. [2024-11-19 17:01:08,522 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 497 transitions. Word has length 62 [2024-11-19 17:01:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:08,522 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 497 transitions. [2024-11-19 17:01:08,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:01:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 497 transitions. [2024-11-19 17:01:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 17:01:08,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:08,524 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:08,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 17:01:08,724 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,SelfDestructingSolverStorable13 [2024-11-19 17:01:08,725 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:08,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1733235891, now seen corresponding path program 11 times [2024-11-19 17:01:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:08,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472436996] [2024-11-19 17:01:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:01:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 17:01:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 17:01:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 17:01:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-19 17:01:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:08,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472436996] [2024-11-19 17:01:08,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472436996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291523701] [2024-11-19 17:01:08,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:01:08,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:08,961 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 17:01:08,963 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 17:01:09,091 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-19 17:01:09,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:01:09,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 17:01:09,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:01:09,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291523701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:01:09,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:01:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-19 17:01:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663263520] [2024-11-19 17:01:09,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:09,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 17:01:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 17:01:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-19 17:01:09,323 INFO L87 Difference]: Start difference. First operand 374 states and 497 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:09,813 INFO L93 Difference]: Finished difference Result 830 states and 1112 transitions. [2024-11-19 17:01:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 17:01:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2024-11-19 17:01:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:09,819 INFO L225 Difference]: With dead ends: 830 [2024-11-19 17:01:09,819 INFO L226 Difference]: Without dead ends: 551 [2024-11-19 17:01:09,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 119 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-19 17:01:09,821 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 302 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:09,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 319 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:01:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-11-19 17:01:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 490. [2024-11-19 17:01:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 337 states have (on average 1.1275964391691395) internal successors, (380), 337 states have internal predecessors, (380), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2024-11-19 17:01:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-11-19 17:01:09,935 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 64 [2024-11-19 17:01:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:09,935 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-11-19 17:01:09,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-11-19 17:01:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 17:01:09,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:09,936 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:09,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 17:01:10,136 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,SelfDestructingSolverStorable14 [2024-11-19 17:01:10,137 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:10,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2005252301, now seen corresponding path program 12 times [2024-11-19 17:01:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749939834] [2024-11-19 17:01:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:01:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 17:01:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:01:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 17:01:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-19 17:01:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:10,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749939834] [2024-11-19 17:01:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749939834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754897123] [2024-11-19 17:01:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:01:10,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:10,368 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 17:01:10,369 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 17:01:10,611 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-19 17:01:10,611 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:01:10,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 17:01:10,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:01:10,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754897123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:01:10,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:01:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-19 17:01:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800339854] [2024-11-19 17:01:10,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:10,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 17:01:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 17:01:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-19 17:01:10,843 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:11,564 INFO L93 Difference]: Finished difference Result 546 states and 719 transitions. [2024-11-19 17:01:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 17:01:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2024-11-19 17:01:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:11,568 INFO L225 Difference]: With dead ends: 546 [2024-11-19 17:01:11,568 INFO L226 Difference]: Without dead ends: 542 [2024-11-19 17:01:11,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 17:01:11,569 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 167 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:11,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 605 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:01:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2024-11-19 17:01:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 487. [2024-11-19 17:01:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 334 states have (on average 1.125748502994012) internal successors, (376), 335 states have internal predecessors, (376), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2024-11-19 17:01:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 658 transitions. [2024-11-19 17:01:11,702 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 658 transitions. Word has length 64 [2024-11-19 17:01:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:11,703 INFO L471 AbstractCegarLoop]: Abstraction has 487 states and 658 transitions. [2024-11-19 17:01:11,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 658 transitions. [2024-11-19 17:01:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 17:01:11,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:11,704 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:11,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 17:01:11,905 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,SelfDestructingSolverStorable15 [2024-11-19 17:01:11,905 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:11,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1446088757, now seen corresponding path program 13 times [2024-11-19 17:01:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:11,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562893801] [2024-11-19 17:01:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:01:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167885944] [2024-11-19 17:01:11,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:01:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:11,951 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 17:01:11,952 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 17:01:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:12,178 WARN L253 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-19 17:01:12,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:12,217 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 17:01:12,223 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 17:01:12,279 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 17:01:12,288 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 17:01:12,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,360 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 26 treesize of output 28 [2024-11-19 17:01:12,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,375 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 26 treesize of output 28 [2024-11-19 17:01:12,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,480 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 33 treesize of output 38 [2024-11-19 17:01:12,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,495 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 33 treesize of output 38 [2024-11-19 17:01:12,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-19 17:01:12,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-19 17:01:12,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-11-19 17:01:12,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:12,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-11-19 17:01:15,210 INFO L349 Elim1Store]: treesize reduction 240, result has 35.7 percent of original size [2024-11-19 17:01:15,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 178 [2024-11-19 17:01:15,436 INFO L349 Elim1Store]: treesize reduction 264, result has 33.5 percent of original size [2024-11-19 17:01:15,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 98 treesize of output 180 [2024-11-19 17:01:20,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:20,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2024-11-19 17:01:20,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:20,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 489 treesize of output 241 [2024-11-19 17:01:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:01:20,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562893801] [2024-11-19 17:01:22,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 17:01:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167885944] [2024-11-19 17:01:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167885944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:22,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 17:01:22,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2024-11-19 17:01:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941556577] [2024-11-19 17:01:22,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:22,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-19 17:01:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-19 17:01:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2024-11-19 17:01:22,544 INFO L87 Difference]: Start difference. First operand 487 states and 658 transitions. Second operand has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:01:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:27,216 INFO L93 Difference]: Finished difference Result 537 states and 717 transitions. [2024-11-19 17:01:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-19 17:01:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 66 [2024-11-19 17:01:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:27,220 INFO L225 Difference]: With dead ends: 537 [2024-11-19 17:01:27,220 INFO L226 Difference]: Without dead ends: 533 [2024-11-19 17:01:27,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=500, Invalid=6306, Unknown=0, NotChecked=0, Total=6806 [2024-11-19 17:01:27,222 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 92 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:27,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 389 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-19 17:01:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-11-19 17:01:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 508. [2024-11-19 17:01:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 350 states have (on average 1.1257142857142857) internal successors, (394), 351 states have internal predecessors, (394), 145 states have call successors, (145), 12 states have call predecessors, (145), 12 states have return successors, (145), 144 states have call predecessors, (145), 145 states have call successors, (145) [2024-11-19 17:01:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 684 transitions. [2024-11-19 17:01:27,330 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 684 transitions. Word has length 66 [2024-11-19 17:01:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:27,330 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 684 transitions. [2024-11-19 17:01:27,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 40 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 17:01:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 684 transitions. [2024-11-19 17:01:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-19 17:01:27,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:27,332 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:27,340 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 17:01:27,532 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,SelfDestructingSolverStorable16 [2024-11-19 17:01:27,532 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:27,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1824874313, now seen corresponding path program 14 times [2024-11-19 17:01:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581923769] [2024-11-19 17:01:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:01:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 17:01:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 17:01:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-19 17:01:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-19 17:01:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:27,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581923769] [2024-11-19 17:01:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581923769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797505318] [2024-11-19 17:01:27,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:01:27,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:27,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:27,805 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 17:01:27,807 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 17:01:27,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:01:27,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:01:27,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 17:01:27,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:01:28,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797505318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:01:28,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:01:28,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-19 17:01:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910021888] [2024-11-19 17:01:28,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:28,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:01:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:01:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:01:28,201 INFO L87 Difference]: Start difference. First operand 508 states and 684 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:28,902 INFO L93 Difference]: Finished difference Result 1123 states and 1518 transitions. [2024-11-19 17:01:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 17:01:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-11-19 17:01:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:28,909 INFO L225 Difference]: With dead ends: 1123 [2024-11-19 17:01:28,909 INFO L226 Difference]: Without dead ends: 719 [2024-11-19 17:01:28,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-19 17:01:28,912 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 293 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:28,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 376 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:01:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2024-11-19 17:01:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 646. [2024-11-19 17:01:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 439 states have (on average 1.1275626423690206) internal successors, (495), 440 states have internal predecessors, (495), 193 states have call successors, (193), 13 states have call predecessors, (193), 13 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2024-11-19 17:01:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 881 transitions. [2024-11-19 17:01:29,077 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 881 transitions. Word has length 68 [2024-11-19 17:01:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:29,078 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 881 transitions. [2024-11-19 17:01:29,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 881 transitions. [2024-11-19 17:01:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-19 17:01:29,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:29,079 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:29,089 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 17:01:29,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:29,284 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:29,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 375599927, now seen corresponding path program 15 times [2024-11-19 17:01:29,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:29,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266061924] [2024-11-19 17:01:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:29,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 17:01:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-19 17:01:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-19 17:01:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 17:01:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-19 17:01:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:01:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:01:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266061924] [2024-11-19 17:01:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266061924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:01:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74169775] [2024-11-19 17:01:29,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:01:29,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:29,551 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 17:01:29,553 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 17:01:29,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-19 17:01:29,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:01:29,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 17:01:29,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 52 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:01:29,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:01:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:01:30,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74169775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:01:30,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:01:30,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-19 17:01:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130937001] [2024-11-19 17:01:30,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:01:30,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:01:30,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:01:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:01:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:01:30,108 INFO L87 Difference]: Start difference. First operand 646 states and 881 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:01:31,027 INFO L93 Difference]: Finished difference Result 712 states and 947 transitions. [2024-11-19 17:01:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 17:01:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-11-19 17:01:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:01:31,033 INFO L225 Difference]: With dead ends: 712 [2024-11-19 17:01:31,033 INFO L226 Difference]: Without dead ends: 708 [2024-11-19 17:01:31,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 123 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 17:01:31,035 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 221 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:01:31,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 849 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:01:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2024-11-19 17:01:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 648. [2024-11-19 17:01:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 441 states have (on average 1.126984126984127) internal successors, (497), 442 states have internal predecessors, (497), 193 states have call successors, (193), 13 states have call predecessors, (193), 13 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2024-11-19 17:01:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 883 transitions. [2024-11-19 17:01:31,198 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 883 transitions. Word has length 68 [2024-11-19 17:01:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:01:31,199 INFO L471 AbstractCegarLoop]: Abstraction has 648 states and 883 transitions. [2024-11-19 17:01:31,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 17:01:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 883 transitions. [2024-11-19 17:01:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-19 17:01:31,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:01:31,201 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:01:31,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 17:01:31,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:31,402 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:01:31,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:01:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash 227511097, now seen corresponding path program 16 times [2024-11-19 17:01:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:01:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785220716] [2024-11-19 17:01:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:01:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:01:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 17:01:31,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241497405] [2024-11-19 17:01:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:01:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:01:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:01:31,464 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 17:01:31,467 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 17:01:31,857 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:01:31,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:01:31,861 WARN L253 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-19 17:01:31,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:01:31,884 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 17:01:31,890 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 17:01:31,953 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 25 treesize of output 24 [2024-11-19 17:01:31,965 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 25 treesize of output 24 [2024-11-19 17:01:32,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,055 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 36 treesize of output 38 [2024-11-19 17:01:32,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,068 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 36 treesize of output 38 [2024-11-19 17:01:32,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,223 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 47 treesize of output 52 [2024-11-19 17:01:32,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,236 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 47 treesize of output 52 [2024-11-19 17:01:32,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 66 [2024-11-19 17:01:32,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 66 [2024-11-19 17:01:32,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2024-11-19 17:01:32,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2024-11-19 17:01:32,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 94 [2024-11-19 17:01:32,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:32,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 94 [2024-11-19 17:01:36,117 INFO L349 Elim1Store]: treesize reduction 546, result has 29.2 percent of original size [2024-11-19 17:01:36,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 21 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 177 treesize of output 279 [2024-11-19 17:01:36,542 INFO L349 Elim1Store]: treesize reduction 574, result has 28.2 percent of original size [2024-11-19 17:01:36,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 21 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 177 treesize of output 281 [2024-11-19 17:01:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:48,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 63 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 496 treesize of output 532 [2024-11-19 17:01:48,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:01:48,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:01:48,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 63 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 639 treesize of output 591