./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-cav19/array_tiling_tcpy.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 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:11:05,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:11:05,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:11:05,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:11:05,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:11:05,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:11:05,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:11:05,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:11:05,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:11:05,892 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:11:05,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:11:05,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:11:05,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:11:05,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:11:05,895 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:11:05,896 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:11:05,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:11:05,896 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:11:05,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:11:05,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:11:05,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:11:05,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:11:05,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:11:05,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:11:05,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:11:05,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:11:05,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:11:05,901 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:11:05,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:11:05,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:11:05,902 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:11:05,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:11:05,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:11:05,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:11:05,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:11:05,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:11:05,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:11:05,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:11:05,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:11:05,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:11:05,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:11:05,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:11:05,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2024-11-08 10:11:06,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:11:06,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:11:06,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:11:06,101 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:11:06,101 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:11:06,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-08 10:11:07,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:11:07,650 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:11:07,651 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-08 10:11:07,656 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eda335c2/db0147c87c344b068ba3847a929c2217/FLAG7b0dd18d3 [2024-11-08 10:11:07,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eda335c2/db0147c87c344b068ba3847a929c2217 [2024-11-08 10:11:07,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:11:07,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:11:07,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:11:07,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:11:07,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:11:07,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56787744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07, skipping insertion in model container [2024-11-08 10:11:07,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,689 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:11:07,834 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-cav19/array_tiling_tcpy.c[408,421] [2024-11-08 10:11:07,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:11:07,857 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:11:07,865 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-cav19/array_tiling_tcpy.c[408,421] [2024-11-08 10:11:07,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:11:07,885 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:11:07,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07 WrapperNode [2024-11-08 10:11:07,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:11:07,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:11:07,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:11:07,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:11:07,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,912 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-08 10:11:07,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:11:07,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:11:07,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:11:07,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:11:07,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,934 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 2, 0]. [2024-11-08 10:11:07,934 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:11:07,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:11:07,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:11:07,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:11:07,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (1/1) ... [2024-11-08 10:11:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:11:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:07,978 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) [2024-11-08 10:11:08,001 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 [2024-11-08 10:11:08,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:11:08,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 10:11:08,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 10:11:08,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:11:08,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:11:08,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:11:08,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:11:08,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:11:08,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:11:08,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:11:08,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:11:08,118 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:11:08,120 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:11:08,223 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 10:11:08,223 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:11:08,233 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:11:08,233 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 10:11:08,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:11:08 BoogieIcfgContainer [2024-11-08 10:11:08,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:11:08,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:11:08,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:11:08,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:11:08,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:11:07" (1/3) ... [2024-11-08 10:11:08,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec5b5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:11:08, skipping insertion in model container [2024-11-08 10:11:08,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:11:07" (2/3) ... [2024-11-08 10:11:08,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec5b5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:11:08, skipping insertion in model container [2024-11-08 10:11:08,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:11:08" (3/3) ... [2024-11-08 10:11:08,243 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2024-11-08 10:11:08,254 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:11:08,254 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:11:08,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:11:08,303 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;@1026e9a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:11:08,303 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:11:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 10:11:08,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:08,311 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:08,311 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:08,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 932171383, now seen corresponding path program 1 times [2024-11-08 10:11:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236848258] [2024-11-08 10:11:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236848258] [2024-11-08 10:11:08,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236848258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:11:08,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:11:08,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:11:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581130035] [2024-11-08 10:11:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:11:08,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:11:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:11:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:11:08,497 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:08,509 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2024-11-08 10:11:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:11:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-08 10:11:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:08,515 INFO L225 Difference]: With dead ends: 41 [2024-11-08 10:11:08,515 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 10:11:08,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:11:08,520 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:08,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:11:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 10:11:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 10:11:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-08 10:11:08,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 18 [2024-11-08 10:11:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:08,549 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-08 10:11:08,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-08 10:11:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 10:11:08,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:08,550 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:08,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:11:08,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:08,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:08,551 INFO L85 PathProgramCache]: Analyzing trace with hash 601112503, now seen corresponding path program 1 times [2024-11-08 10:11:08,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:08,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909052951] [2024-11-08 10:11:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:08,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:08,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909052951] [2024-11-08 10:11:08,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909052951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:11:08,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:11:08,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:11:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075226550] [2024-11-08 10:11:08,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:11:08,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:11:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:11:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:11:08,694 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:08,717 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-08 10:11:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:11:08,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-08 10:11:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:08,718 INFO L225 Difference]: With dead ends: 34 [2024-11-08 10:11:08,718 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 10:11:08,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:11:08,719 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:08,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:11:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 10:11:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2024-11-08 10:11:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-08 10:11:08,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 18 [2024-11-08 10:11:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:08,724 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-08 10:11:08,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-08 10:11:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:11:08,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:08,724 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:08,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:11:08,725 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:08,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash -506086443, now seen corresponding path program 1 times [2024-11-08 10:11:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:08,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599666675] [2024-11-08 10:11:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599666675] [2024-11-08 10:11:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599666675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230549192] [2024-11-08 10:11:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:09,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:09,078 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) [2024-11-08 10:11:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:11:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 10:11:09,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:09,211 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 30 treesize of output 31 [2024-11-08 10:11:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:09,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:09,428 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-08 10:11:09,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 36 [2024-11-08 10:11:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:09,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230549192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:09,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:09,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 10:11:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560692513] [2024-11-08 10:11:09,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:09,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 10:11:09,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 10:11:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:11:09,458 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:09,558 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-11-08 10:11:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:11:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-08 10:11:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:09,559 INFO L225 Difference]: With dead ends: 26 [2024-11-08 10:11:09,560 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 10:11:09,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:11:09,561 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:09,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:11:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 10:11:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-11-08 10:11:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-08 10:11:09,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2024-11-08 10:11:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:09,565 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-08 10:11:09,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-08 10:11:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:11:09,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:09,566 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:09,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 10:11:09,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:09,768 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:09,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1327390603, now seen corresponding path program 1 times [2024-11-08 10:11:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:09,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479191651] [2024-11-08 10:11:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 10:11:09,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479191651] [2024-11-08 10:11:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479191651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335362527] [2024-11-08 10:11:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:09,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:09,930 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) [2024-11-08 10:11:09,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:11:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:09,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:11:09,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 10:11:10,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 10:11:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335362527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:10,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:10,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:11:10,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885177709] [2024-11-08 10:11:10,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:10,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:11:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:11:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:11:10,104 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:10,203 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-08 10:11:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 10:11:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-08 10:11:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:10,204 INFO L225 Difference]: With dead ends: 41 [2024-11-08 10:11:10,204 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 10:11:10,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:11:10,205 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:10,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 76 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:11:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 10:11:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2024-11-08 10:11:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-08 10:11:10,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 24 [2024-11-08 10:11:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:10,217 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-08 10:11:10,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-08 10:11:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 10:11:10,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:10,220 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:10,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:11:10,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 10:11:10,422 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:10,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2146579159, now seen corresponding path program 2 times [2024-11-08 10:11:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:10,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410316505] [2024-11-08 10:11:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:10,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:10,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:10,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410316505] [2024-11-08 10:11:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410316505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546468968] [2024-11-08 10:11:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:11:10,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:10,855 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) [2024-11-08 10:11:10,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:11:10,910 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:11:10,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:10,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 10:11:10,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:11,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 10:11:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:11:11,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:11,316 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-08 10:11:11,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-08 10:11:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546468968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:11,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 23 [2024-11-08 10:11:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088037205] [2024-11-08 10:11:11,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:11,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:11:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:11:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:11:11,382 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:11:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:11,597 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-08 10:11:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:11:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-11-08 10:11:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:11,598 INFO L225 Difference]: With dead ends: 32 [2024-11-08 10:11:11,598 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 10:11:11,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2024-11-08 10:11:11,599 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:11,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:11:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 10:11:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-11-08 10:11:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-08 10:11:11,603 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 26 [2024-11-08 10:11:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:11,603 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-08 10:11:11,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:11:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-08 10:11:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 10:11:11,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:11,604 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:11,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:11:11,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:11,809 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:11,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash 92645087, now seen corresponding path program 3 times [2024-11-08 10:11:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836671151] [2024-11-08 10:11:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:12,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:12,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836671151] [2024-11-08 10:11:12,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836671151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:12,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053462512] [2024-11-08 10:11:12,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:11:12,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:12,162 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) [2024-11-08 10:11:12,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:11:12,224 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:11:12,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:12,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 10:11:12,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:12,273 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 40 treesize of output 41 [2024-11-08 10:11:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:11:12,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:12,679 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 73 treesize of output 51 [2024-11-08 10:11:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:11:12,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:12,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2024-11-08 10:11:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:12,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:12,917 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-08 10:11:12,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2024-11-08 10:11:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053462512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:12,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-08 10:11:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586262959] [2024-11-08 10:11:12,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:12,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 10:11:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 10:11:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:11:12,970 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:14,061 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-11-08 10:11:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 10:11:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-08 10:11:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:14,062 INFO L225 Difference]: With dead ends: 87 [2024-11-08 10:11:14,063 INFO L226 Difference]: Without dead ends: 85 [2024-11-08 10:11:14,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=612, Invalid=2468, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 10:11:14,065 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:14,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 221 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:11:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-08 10:11:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2024-11-08 10:11:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-08 10:11:14,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 30 [2024-11-08 10:11:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:14,075 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-08 10:11:14,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-08 10:11:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 10:11:14,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:14,077 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:14,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 10:11:14,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:14,282 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:14,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -210913899, now seen corresponding path program 4 times [2024-11-08 10:11:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087522137] [2024-11-08 10:11:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:14,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:14,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087522137] [2024-11-08 10:11:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087522137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734824224] [2024-11-08 10:11:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:11:14,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:14,763 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) [2024-11-08 10:11:14,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:11:14,834 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:11:14,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:14,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 10:11:14,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:14,849 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 30 treesize of output 31 [2024-11-08 10:11:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:14,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:14,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:15,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:15,606 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-08 10:11:15,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 53 [2024-11-08 10:11:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734824224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:15,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2024-11-08 10:11:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202425846] [2024-11-08 10:11:15,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:15,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-08 10:11:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-08 10:11:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 10:11:15,641 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:16,438 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2024-11-08 10:11:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 10:11:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-11-08 10:11:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:16,443 INFO L225 Difference]: With dead ends: 100 [2024-11-08 10:11:16,443 INFO L226 Difference]: Without dead ends: 71 [2024-11-08 10:11:16,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=734, Invalid=2806, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 10:11:16,445 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:16,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 275 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:11:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-08 10:11:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2024-11-08 10:11:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-08 10:11:16,464 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2024-11-08 10:11:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:16,465 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-08 10:11:16,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-08 10:11:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 10:11:16,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:16,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:16,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 10:11:16,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:16,667 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:16,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1409886821, now seen corresponding path program 5 times [2024-11-08 10:11:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:16,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666006163] [2024-11-08 10:11:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:17,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:17,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:17,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666006163] [2024-11-08 10:11:17,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666006163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:17,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835966958] [2024-11-08 10:11:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:11:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:17,169 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) [2024-11-08 10:11:17,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:11:17,238 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 10:11:17,239 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:17,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 10:11:17,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:17,269 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 30 treesize of output 31 [2024-11-08 10:11:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:17,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:17,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:17,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:17,789 INFO L349 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2024-11-08 10:11:17,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 67 [2024-11-08 10:11:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:17,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835966958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:17,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:17,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-11-08 10:11:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48449965] [2024-11-08 10:11:17,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:17,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 10:11:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 10:11:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2024-11-08 10:11:17,862 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:18,289 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-11-08 10:11:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 10:11:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-11-08 10:11:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:18,290 INFO L225 Difference]: With dead ends: 85 [2024-11-08 10:11:18,291 INFO L226 Difference]: Without dead ends: 83 [2024-11-08 10:11:18,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 10:11:18,292 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:18,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 304 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:11:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-08 10:11:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 37. [2024-11-08 10:11:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-08 10:11:18,300 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2024-11-08 10:11:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:18,300 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-08 10:11:18,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-08 10:11:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 10:11:18,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:18,301 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:18,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 10:11:18,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:18,509 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:18,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1057244567, now seen corresponding path program 6 times [2024-11-08 10:11:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051650164] [2024-11-08 10:11:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:19,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:19,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:19,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051650164] [2024-11-08 10:11:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051650164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721798097] [2024-11-08 10:11:19,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:11:19,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:19,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:19,107 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) [2024-11-08 10:11:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:11:19,170 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 10:11:19,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:19,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 10:11:19,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:19,187 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 30 treesize of output 31 [2024-11-08 10:11:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:19,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:19,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:19,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:20,034 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-08 10:11:20,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 53 [2024-11-08 10:11:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721798097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:20,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-11-08 10:11:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424065195] [2024-11-08 10:11:20,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:20,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 10:11:20,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 10:11:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 10:11:20,101 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:21,001 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2024-11-08 10:11:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 10:11:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2024-11-08 10:11:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:21,002 INFO L225 Difference]: With dead ends: 102 [2024-11-08 10:11:21,002 INFO L226 Difference]: Without dead ends: 100 [2024-11-08 10:11:21,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=615, Invalid=3045, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 10:11:21,003 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:21,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 320 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:11:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-08 10:11:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2024-11-08 10:11:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-08 10:11:21,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 40 [2024-11-08 10:11:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:21,016 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-08 10:11:21,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-08 10:11:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 10:11:21,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:21,017 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:21,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 10:11:21,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:21,238 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:21,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 389739551, now seen corresponding path program 7 times [2024-11-08 10:11:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790861100] [2024-11-08 10:11:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:21,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:21,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:21,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790861100] [2024-11-08 10:11:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790861100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704210793] [2024-11-08 10:11:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:11:21,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:21,921 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) [2024-11-08 10:11:21,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:11:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:22,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 10:11:22,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:22,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 10:11:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:22,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:22,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:22,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:11:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:11:23,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:23,455 INFO L349 Elim1Store]: treesize reduction 126, result has 17.6 percent of original size [2024-11-08 10:11:23,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 88 [2024-11-08 10:11:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704210793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:23,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 17] total 48 [2024-11-08 10:11:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774699310] [2024-11-08 10:11:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:23,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 10:11:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 10:11:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 10:11:23,514 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:11:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:25,061 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2024-11-08 10:11:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 10:11:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-11-08 10:11:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:25,062 INFO L225 Difference]: With dead ends: 163 [2024-11-08 10:11:25,062 INFO L226 Difference]: Without dead ends: 161 [2024-11-08 10:11:25,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1406, Invalid=6250, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 10:11:25,064 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:25,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 387 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:11:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-08 10:11:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2024-11-08 10:11:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2024-11-08 10:11:25,085 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 44 [2024-11-08 10:11:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:25,085 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2024-11-08 10:11:25,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:11:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2024-11-08 10:11:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 10:11:25,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:25,086 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:25,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 10:11:25,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 10:11:25,291 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:25,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1664770773, now seen corresponding path program 8 times [2024-11-08 10:11:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:25,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530404924] [2024-11-08 10:11:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:25,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:25,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530404924] [2024-11-08 10:11:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530404924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723668771] [2024-11-08 10:11:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:11:25,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:25,425 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) [2024-11-08 10:11:25,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:11:25,492 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:11:25,492 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:25,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 10:11:25,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:25,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:25,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723668771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:25,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:25,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-11-08 10:11:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614121862] [2024-11-08 10:11:25,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:25,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:11:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:11:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:11:25,742 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:25,852 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2024-11-08 10:11:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 10:11:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2024-11-08 10:11:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:25,853 INFO L225 Difference]: With dead ends: 123 [2024-11-08 10:11:25,853 INFO L226 Difference]: Without dead ends: 91 [2024-11-08 10:11:25,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-08 10:11:25,854 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:25,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 202 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:11:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-08 10:11:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2024-11-08 10:11:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-11-08 10:11:25,872 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 48 [2024-11-08 10:11:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:25,872 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-11-08 10:11:25,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-11-08 10:11:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 10:11:25,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:25,874 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:25,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 10:11:26,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:26,079 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:26,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1255578655, now seen corresponding path program 9 times [2024-11-08 10:11:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:26,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757909631] [2024-11-08 10:11:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:26,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:26,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:26,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757909631] [2024-11-08 10:11:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757909631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833823979] [2024-11-08 10:11:26,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:11:26,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:26,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:26,757 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) [2024-11-08 10:11:26,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:11:26,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-08 10:11:26,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:26,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 10:11:26,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:27,022 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 33 treesize of output 34 [2024-11-08 10:11:27,110 INFO L349 Elim1Store]: treesize reduction 136, result has 13.9 percent of original size [2024-11-08 10:11:27,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 83 [2024-11-08 10:11:27,258 INFO L349 Elim1Store]: treesize reduction 327, result has 12.8 percent of original size [2024-11-08 10:11:27,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 132 [2024-11-08 10:11:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:28,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:28,840 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2024-11-08 10:11:28,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 94 [2024-11-08 10:11:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833823979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:29,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2024-11-08 10:11:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615391890] [2024-11-08 10:11:29,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:29,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 10:11:29,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 10:11:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 10:11:29,051 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:30,814 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2024-11-08 10:11:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 10:11:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2024-11-08 10:11:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:30,815 INFO L225 Difference]: With dead ends: 136 [2024-11-08 10:11:30,815 INFO L226 Difference]: Without dead ends: 134 [2024-11-08 10:11:30,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=4402, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 10:11:30,817 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 77 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:30,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1072 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 10:11:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-08 10:11:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 56. [2024-11-08 10:11:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2024-11-08 10:11:30,850 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 48 [2024-11-08 10:11:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:30,851 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2024-11-08 10:11:30,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2024-11-08 10:11:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 10:11:30,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:30,853 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:30,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 10:11:31,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 10:11:31,054 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:31,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1648208269, now seen corresponding path program 10 times [2024-11-08 10:11:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:31,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464658197] [2024-11-08 10:11:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:31,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:31,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:31,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:31,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464658197] [2024-11-08 10:11:31,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464658197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:31,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2379800] [2024-11-08 10:11:31,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:11:31,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:31,827 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) [2024-11-08 10:11:31,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 10:11:31,996 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:11:31,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:31,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 10:11:32,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:32,018 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 30 treesize of output 31 [2024-11-08 10:11:32,092 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:11:32,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:32,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:32,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:32,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:11:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:33,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:33,567 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2024-11-08 10:11:33,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 75 [2024-11-08 10:11:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:33,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2379800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:33,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:33,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2024-11-08 10:11:33,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540662895] [2024-11-08 10:11:33,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:33,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-08 10:11:33,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-08 10:11:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 10:11:33,670 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:35,374 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2024-11-08 10:11:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 10:11:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2024-11-08 10:11:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:35,376 INFO L225 Difference]: With dead ends: 153 [2024-11-08 10:11:35,376 INFO L226 Difference]: Without dead ends: 151 [2024-11-08 10:11:35,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1042, Invalid=5600, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 10:11:35,378 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:35,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 481 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:11:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-08 10:11:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2024-11-08 10:11:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-08 10:11:35,407 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 50 [2024-11-08 10:11:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:35,407 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-08 10:11:35,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-08 10:11:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 10:11:35,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:35,411 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:35,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 10:11:35,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:11:35,616 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:35,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1210025175, now seen corresponding path program 11 times [2024-11-08 10:11:35,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:35,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601850706] [2024-11-08 10:11:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:36,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:36,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:36,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601850706] [2024-11-08 10:11:36,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601850706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823274916] [2024-11-08 10:11:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:11:36,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:36,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:36,356 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) [2024-11-08 10:11:36,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 10:11:36,486 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 10:11:36,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:36,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-08 10:11:36,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:36,504 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 30 treesize of output 31 [2024-11-08 10:11:36,586 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:11:36,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:36,710 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-08 10:11:36,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:11:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:36,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:36,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 139 [2024-11-08 10:11:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:38,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:38,824 INFO L349 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2024-11-08 10:11:38,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 149 treesize of output 97 [2024-11-08 10:11:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823274916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:38,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:38,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 57 [2024-11-08 10:11:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213109963] [2024-11-08 10:11:38,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:38,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 10:11:38,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 10:11:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 10:11:38,886 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 57 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:41,138 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2024-11-08 10:11:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-08 10:11:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 57 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-08 10:11:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:41,140 INFO L225 Difference]: With dead ends: 161 [2024-11-08 10:11:41,140 INFO L226 Difference]: Without dead ends: 159 [2024-11-08 10:11:41,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1292, Invalid=7080, Unknown=0, NotChecked=0, Total=8372 [2024-11-08 10:11:41,142 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 222 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:41,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 670 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 10:11:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-08 10:11:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 91. [2024-11-08 10:11:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2024-11-08 10:11:41,171 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 54 [2024-11-08 10:11:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:41,171 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2024-11-08 10:11:41,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 57 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2024-11-08 10:11:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 10:11:41,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:41,172 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:41,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 10:11:41,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 10:11:41,376 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:41,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1995434443, now seen corresponding path program 12 times [2024-11-08 10:11:41,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:41,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373190627] [2024-11-08 10:11:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:41,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:41,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:41,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:41,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:41,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373190627] [2024-11-08 10:11:41,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373190627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:41,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491563309] [2024-11-08 10:11:41,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:11:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:41,976 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) [2024-11-08 10:11:41,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 10:11:42,294 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 10:11:42,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:42,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 10:11:42,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:42,344 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 30 treesize of output 31 [2024-11-08 10:11:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,432 INFO L349 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2024-11-08 10:11:42,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2024-11-08 10:11:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:42,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:42,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 123 [2024-11-08 10:11:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:43,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:44,420 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2024-11-08 10:11:44,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 94 [2024-11-08 10:11:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:44,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491563309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:44,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:44,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 47 [2024-11-08 10:11:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754185419] [2024-11-08 10:11:44,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:44,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 10:11:44,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 10:11:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 10:11:44,631 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 47 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:45,728 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2024-11-08 10:11:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-08 10:11:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 47 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-08 10:11:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:45,729 INFO L225 Difference]: With dead ends: 168 [2024-11-08 10:11:45,729 INFO L226 Difference]: Without dead ends: 166 [2024-11-08 10:11:45,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2024-11-08 10:11:45,732 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 76 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:45,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 919 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 10:11:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-08 10:11:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 68. [2024-11-08 10:11:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-08 10:11:45,761 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 54 [2024-11-08 10:11:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:45,761 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-08 10:11:45,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 47 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-08 10:11:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 10:11:45,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:45,762 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:45,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 10:11:45,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 10:11:45,962 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:45,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1739500321, now seen corresponding path program 13 times [2024-11-08 10:11:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:45,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781598691] [2024-11-08 10:11:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:45,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:46,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:46,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781598691] [2024-11-08 10:11:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781598691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808172219] [2024-11-08 10:11:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:11:46,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:46,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:46,137 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) [2024-11-08 10:11:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 10:11:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:46,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 10:11:46,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:46,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:46,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808172219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:46,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:46,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-11-08 10:11:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930147084] [2024-11-08 10:11:46,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:46,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 10:11:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 10:11:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:11:46,550 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:46,701 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2024-11-08 10:11:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 10:11:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2024-11-08 10:11:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:46,702 INFO L225 Difference]: With dead ends: 128 [2024-11-08 10:11:46,703 INFO L226 Difference]: Without dead ends: 88 [2024-11-08 10:11:46,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2024-11-08 10:11:46,703 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:46,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 212 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:11:46,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-08 10:11:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2024-11-08 10:11:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-11-08 10:11:46,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 58 [2024-11-08 10:11:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:46,730 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-11-08 10:11:46,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 28 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-11-08 10:11:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 10:11:46,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:46,731 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:46,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 10:11:46,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:46,936 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:46,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1863591171, now seen corresponding path program 14 times [2024-11-08 10:11:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734067270] [2024-11-08 10:11:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:47,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:47,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:47,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:47,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734067270] [2024-11-08 10:11:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734067270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:47,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734281395] [2024-11-08 10:11:47,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:11:47,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:47,783 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) [2024-11-08 10:11:47,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 10:11:47,876 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:11:47,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:47,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-08 10:11:47,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:47,892 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 30 treesize of output 31 [2024-11-08 10:11:47,978 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:11:47,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:11:48,084 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-08 10:11:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:11:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:48,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:48,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 139 [2024-11-08 10:11:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:49,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:11:50,466 INFO L349 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2024-11-08 10:11:50,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 149 treesize of output 97 [2024-11-08 10:11:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734281395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:11:50,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:11:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 60 [2024-11-08 10:11:50,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275206465] [2024-11-08 10:11:50,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:11:50,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 10:11:50,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:11:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 10:11:50,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3073, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 10:11:50,596 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:11:53,161 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2024-11-08 10:11:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 10:11:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2024-11-08 10:11:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:11:53,163 INFO L225 Difference]: With dead ends: 187 [2024-11-08 10:11:53,163 INFO L226 Difference]: Without dead ends: 185 [2024-11-08 10:11:53,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1383, Invalid=8319, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 10:11:53,164 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 193 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:11:53,164 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 719 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 10:11:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-08 10:11:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 107. [2024-11-08 10:11:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:11:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2024-11-08 10:11:53,207 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 60 [2024-11-08 10:11:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:11:53,208 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2024-11-08 10:11:53,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.3833333333333333) internal successors, (143), 60 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:11:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2024-11-08 10:11:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 10:11:53,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:11:53,208 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:11:53,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 10:11:53,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 10:11:53,413 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:11:53,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:11:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash -141523289, now seen corresponding path program 15 times [2024-11-08 10:11:53,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:11:53,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454831740] [2024-11-08 10:11:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:11:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:11:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:54,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:11:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:54,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:11:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:11:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 3 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:11:54,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:11:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454831740] [2024-11-08 10:11:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454831740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:11:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584148102] [2024-11-08 10:11:54,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:11:54,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:11:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:11:54,298 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) [2024-11-08 10:11:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 10:11:54,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-08 10:11:54,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:11:54,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-08 10:11:54,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:11:54,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 10:11:54,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:54,960 INFO L349 Elim1Store]: treesize reduction 69, result has 21.6 percent of original size [2024-11-08 10:11:54,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2024-11-08 10:11:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,132 INFO L349 Elim1Store]: treesize reduction 171, result has 19.7 percent of original size [2024-11-08 10:11:55,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 123 [2024-11-08 10:11:55,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:11:55,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:11:55,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 169 [2024-11-08 10:12:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 168 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:03,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:12:04,617 INFO L349 Elim1Store]: treesize reduction 292, result has 12.3 percent of original size [2024-11-08 10:12:04,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 167 treesize of output 122 [2024-11-08 10:12:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 12 proven. 160 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:05,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584148102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:12:05,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:12:05,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 67 [2024-11-08 10:12:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084614304] [2024-11-08 10:12:05,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:12:05,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-08 10:12:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:12:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-08 10:12:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3981, Unknown=1, NotChecked=0, Total=4422 [2024-11-08 10:12:05,714 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 67 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:07,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 10:12:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:12:10,420 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2024-11-08 10:12:10,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-08 10:12:10,420 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2024-11-08 10:12:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:12:10,421 INFO L225 Difference]: With dead ends: 194 [2024-11-08 10:12:10,421 INFO L226 Difference]: Without dead ends: 192 [2024-11-08 10:12:10,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=875, Invalid=7866, Unknown=1, NotChecked=0, Total=8742 [2024-11-08 10:12:10,422 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 178 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 10:12:10,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1512 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2226 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 10:12:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-08 10:12:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 107. [2024-11-08 10:12:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 103 states have internal predecessors, (113), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:12:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2024-11-08 10:12:10,471 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 62 [2024-11-08 10:12:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:12:10,472 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2024-11-08 10:12:10,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2024-11-08 10:12:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 10:12:10,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:12:10,472 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:12:10,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 10:12:10,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 10:12:10,673 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:12:10,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:12:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 977316531, now seen corresponding path program 16 times [2024-11-08 10:12:10,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:12:10,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749774422] [2024-11-08 10:12:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:12:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:12:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:11,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:12:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:11,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:12:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:11,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:12:11,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749774422] [2024-11-08 10:12:11,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749774422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:12:11,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971871348] [2024-11-08 10:12:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:12:11,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:12:11,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:12:11,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 10:12:11,979 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:12:11,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:12:11,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-08 10:12:11,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:12:12,017 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 30 treesize of output 31 [2024-11-08 10:12:12,099 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:12:12,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:12:12,201 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-08 10:12:12,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:12:12,352 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-08 10:12:12,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2024-11-08 10:12:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:12,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:12:12,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 175 [2024-11-08 10:12:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:14,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:12:15,604 INFO L349 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2024-11-08 10:12:15,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 183 treesize of output 119 [2024-11-08 10:12:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:15,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971871348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:12:15,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:12:15,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 25] total 66 [2024-11-08 10:12:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882993726] [2024-11-08 10:12:15,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:12:15,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-08 10:12:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:12:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-08 10:12:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 10:12:15,686 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 66 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:12:19,216 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2024-11-08 10:12:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-08 10:12:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 66 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2024-11-08 10:12:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:12:19,217 INFO L225 Difference]: With dead ends: 197 [2024-11-08 10:12:19,217 INFO L226 Difference]: Without dead ends: 195 [2024-11-08 10:12:19,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1679, Invalid=9877, Unknown=0, NotChecked=0, Total=11556 [2024-11-08 10:12:19,219 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 412 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:12:19,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 850 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 10:12:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-08 10:12:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 111. [2024-11-08 10:12:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 107 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:12:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2024-11-08 10:12:19,272 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 64 [2024-11-08 10:12:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:12:19,273 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2024-11-08 10:12:19,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 66 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2024-11-08 10:12:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 10:12:19,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:12:19,273 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:12:19,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 10:12:19,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:19,478 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:12:19,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:12:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 569602397, now seen corresponding path program 17 times [2024-11-08 10:12:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:12:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712126133] [2024-11-08 10:12:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:12:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:12:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:20,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:12:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:20,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:12:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 197 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:20,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:12:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712126133] [2024-11-08 10:12:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712126133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:12:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647805120] [2024-11-08 10:12:20,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:12:20,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:12:20,322 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:12:20,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 10:12:20,644 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-08 10:12:20,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:12:20,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 10:12:20,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:12:20,705 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 30 treesize of output 31 [2024-11-08 10:12:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:12:20,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:12:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:20,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:12:20,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 113 [2024-11-08 10:12:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:22,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:12:23,031 INFO L349 Elim1Store]: treesize reduction 138, result has 18.3 percent of original size [2024-11-08 10:12:23,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 95 [2024-11-08 10:12:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 6 proven. 192 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:23,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647805120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:12:23,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:12:23,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 60 [2024-11-08 10:12:23,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432946725] [2024-11-08 10:12:23,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:12:23,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 10:12:23,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:12:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 10:12:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3171, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 10:12:23,372 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:12:25,652 INFO L93 Difference]: Finished difference Result 208 states and 219 transitions. [2024-11-08 10:12:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-08 10:12:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 66 [2024-11-08 10:12:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:12:25,657 INFO L225 Difference]: With dead ends: 208 [2024-11-08 10:12:25,657 INFO L226 Difference]: Without dead ends: 206 [2024-11-08 10:12:25,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=709, Invalid=7123, Unknown=0, NotChecked=0, Total=7832 [2024-11-08 10:12:25,661 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 215 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:12:25,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1594 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 10:12:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-08 10:12:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 80. [2024-11-08 10:12:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:12:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-11-08 10:12:25,720 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 66 [2024-11-08 10:12:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:12:25,720 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-11-08 10:12:25,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4833333333333334) internal successors, (149), 60 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-11-08 10:12:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 10:12:25,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:12:25,721 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:12:25,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-08 10:12:25,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:25,925 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:12:25,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:12:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2003128471, now seen corresponding path program 18 times [2024-11-08 10:12:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:12:25,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700125720] [2024-11-08 10:12:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:12:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:12:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:26,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:12:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:26,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:12:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:12:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700125720] [2024-11-08 10:12:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700125720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:12:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393875753] [2024-11-08 10:12:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:12:26,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:26,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:12:26,151 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:12:26,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 10:12:26,530 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-08 10:12:26,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:12:26,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 10:12:26,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:12:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:26,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:12:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:26,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393875753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:12:26,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:12:26,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2024-11-08 10:12:26,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908333796] [2024-11-08 10:12:26,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:12:26,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 10:12:26,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:12:26,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 10:12:26,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 10:12:26,966 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:12:27,197 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2024-11-08 10:12:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 10:12:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 68 [2024-11-08 10:12:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:12:27,198 INFO L225 Difference]: With dead ends: 152 [2024-11-08 10:12:27,198 INFO L226 Difference]: Without dead ends: 104 [2024-11-08 10:12:27,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=1055, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 10:12:27,199 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:12:27,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 200 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:12:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-08 10:12:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2024-11-08 10:12:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:12:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-11-08 10:12:27,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 68 [2024-11-08 10:12:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:12:27,249 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-11-08 10:12:27,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 10:12:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-11-08 10:12:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-08 10:12:27,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:12:27,249 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:12:27,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 10:12:27,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:27,454 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:12:27,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:12:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash 823306247, now seen corresponding path program 19 times [2024-11-08 10:12:27,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:12:27,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238323351] [2024-11-08 10:12:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:12:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:12:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:28,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:12:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:28,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:12:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:28,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:12:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238323351] [2024-11-08 10:12:28,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238323351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:12:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511617598] [2024-11-08 10:12:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:12:28,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:12:28,441 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:12:28,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 10:12:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:28,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 10:12:28,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:12:28,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-08 10:12:28,855 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:12:28,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:12:28,999 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-08 10:12:28,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:12:29,189 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-08 10:12:29,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2024-11-08 10:12:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:29,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:12:29,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 175 [2024-11-08 10:12:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:12:31,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:12:33,018 INFO L349 Elim1Store]: treesize reduction 286, result has 14.1 percent of original size [2024-11-08 10:12:33,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 205 treesize of output 146 [2024-11-08 10:12:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:33,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511617598] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:12:33,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:12:33,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 27] total 76 [2024-11-08 10:12:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862466489] [2024-11-08 10:12:33,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:12:33,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-08 10:12:33,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:12:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-08 10:12:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=5040, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 10:12:33,234 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 76 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 75 states have internal predecessors, (179), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:12:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:12:38,438 INFO L93 Difference]: Finished difference Result 225 states and 236 transitions. [2024-11-08 10:12:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 10:12:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 75 states have internal predecessors, (179), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2024-11-08 10:12:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:12:38,439 INFO L225 Difference]: With dead ends: 225 [2024-11-08 10:12:38,440 INFO L226 Difference]: Without dead ends: 223 [2024-11-08 10:12:38,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2393, Invalid=15697, Unknown=0, NotChecked=0, Total=18090 [2024-11-08 10:12:38,441 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 271 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:12:38,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 880 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 10:12:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-08 10:12:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 127. [2024-11-08 10:12:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 10:12:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2024-11-08 10:12:38,540 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 70 [2024-11-08 10:12:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:12:38,541 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2024-11-08 10:12:38,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 75 states have internal predecessors, (179), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 10:12:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2024-11-08 10:12:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-08 10:12:38,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:12:38,541 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:12:38,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-08 10:12:38,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-08 10:12:38,745 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:12:38,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:12:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1597644099, now seen corresponding path program 20 times [2024-11-08 10:12:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:12:38,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528864970] [2024-11-08 10:12:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:12:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:12:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:40,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:12:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:40,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 10:12:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:12:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:12:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528864970] [2024-11-08 10:12:40,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528864970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:12:40,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92037568] [2024-11-08 10:12:40,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:12:40,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:12:40,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:12:40,670 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:12:40,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 10:12:40,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:12:40,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:12:40,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 10:12:40,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:12:40,844 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 30 treesize of output 31 [2024-11-08 10:12:40,957 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-08 10:12:40,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-08 10:12:41,062 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-08 10:12:41,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2024-11-08 10:12:41,214 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-08 10:12:41,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2024-11-08 10:12:41,389 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2024-11-08 10:12:41,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2024-11-08 10:12:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:12:41,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:12:41,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 66 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 211 [2024-11-08 10:12:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:12:44,093 INFO L311 TraceCheckSpWp]: Computing backward predicates...