./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 8be7027f 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-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 15:49:08,029 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 15:49:08,088 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 15:49:08,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 15:49:08,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 15:49:08,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 15:49:08,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 15:49:08,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 15:49:08,111 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 15:49:08,112 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 15:49:08,113 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 15:49:08,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 15:49:08,113 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 15:49:08,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 15:49:08,115 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 15:49:08,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 15:49:08,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 15:49:08,116 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 15:49:08,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 15:49:08,116 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 15:49:08,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 15:49:08,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 15:49:08,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 15:49:08,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 15:49:08,119 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 15:49:08,120 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 15:49:08,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 15:49:08,120 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 15:49:08,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 15:49:08,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 15:49:08,121 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 15:49:08,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 15:49:08,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:49:08,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 15:49:08,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 15:49:08,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 15:49:08,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 15:49:08,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 15:49:08,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 15:49:08,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 15:49:08,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 15:49:08,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 15:49:08,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2024-11-11 15:49:08,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 15:49:08,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 15:49:08,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 15:49:08,332 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 15:49:08,332 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 15:49:08,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-11 15:49:09,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 15:49:09,626 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 15:49:09,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2024-11-11 15:49:09,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8edde7a3c/d78664de09cc42198bee63dc540976e6/FLAG4b4e9e676 [2024-11-11 15:49:10,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8edde7a3c/d78664de09cc42198bee63dc540976e6 [2024-11-11 15:49:10,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 15:49:10,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 15:49:10,053 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 15:49:10,053 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 15:49:10,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 15:49:10,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1b0ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10, skipping insertion in model container [2024-11-11 15:49:10,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,072 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 15:49:10,189 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] [2024-11-11 15:49:10,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:49:10,206 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 15:49:10,214 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] [2024-11-11 15:49:10,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:49:10,232 INFO L204 MainTranslator]: Completed translation [2024-11-11 15:49:10,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10 WrapperNode [2024-11-11 15:49:10,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 15:49:10,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 15:49:10,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 15:49:10,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 15:49:10,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,255 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-11 15:49:10,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 15:49:10,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 15:49:10,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 15:49:10,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 15:49:10,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,270 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,284 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]. [2024-11-11 15:49:10,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 15:49:10,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 15:49:10,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 15:49:10,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 15:49:10,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (1/1) ... [2024-11-11 15:49:10,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:49:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:10,325 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) [2024-11-11 15:49:10,327 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 [2024-11-11 15:49:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 15:49:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 15:49:10,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 15:49:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 15:49:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 15:49:10,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 15:49:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 15:49:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 15:49:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 15:49:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 15:49:10,417 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 15:49:10,420 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 15:49:10,534 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-11 15:49:10,534 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 15:49:10,546 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 15:49:10,546 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 15:49:10,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:49:10 BoogieIcfgContainer [2024-11-11 15:49:10,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 15:49:10,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 15:49:10,551 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 15:49:10,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 15:49:10,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:49:10" (1/3) ... [2024-11-11 15:49:10,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722eee62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:49:10, skipping insertion in model container [2024-11-11 15:49:10,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:49:10" (2/3) ... [2024-11-11 15:49:10,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722eee62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:49:10, skipping insertion in model container [2024-11-11 15:49:10,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:49:10" (3/3) ... [2024-11-11 15:49:10,557 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2024-11-11 15:49:10,571 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 15:49:10,571 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 15:49:10,625 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 15:49:10,633 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;@73d3f040, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 15:49:10,634 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 15:49:10,638 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) [2024-11-11 15:49:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-11 15:49:10,644 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:10,645 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:10,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:10,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash 932171383, now seen corresponding path program 1 times [2024-11-11 15:49:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:10,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514815390] [2024-11-11 15:49:10,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:10,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:10,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514815390] [2024-11-11 15:49:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514815390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:49:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:49:10,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 15:49:10,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941957125] [2024-11-11 15:49:10,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:49:10,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 15:49:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 15:49:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 15:49:10,809 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) [2024-11-11 15:49:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:10,821 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2024-11-11 15:49:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 15:49:10,823 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 [2024-11-11 15:49:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:10,827 INFO L225 Difference]: With dead ends: 41 [2024-11-11 15:49:10,827 INFO L226 Difference]: Without dead ends: 18 [2024-11-11 15:49:10,829 INFO L434 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 [2024-11-11 15:49:10,831 INFO L435 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 [2024-11-11 15:49:10,832 INFO L436 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] [2024-11-11 15:49:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-11 15:49:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-11 15:49:10,859 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) [2024-11-11 15:49:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-11 15:49:10,861 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 18 [2024-11-11 15:49:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:10,861 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-11 15:49:10,861 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) [2024-11-11 15:49:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-11 15:49:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-11 15:49:10,863 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:10,863 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:10,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 15:49:10,863 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:10,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 601112503, now seen corresponding path program 1 times [2024-11-11 15:49:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321525925] [2024-11-11 15:49:10,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:10,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321525925] [2024-11-11 15:49:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321525925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:49:11,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:49:11,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 15:49:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926656041] [2024-11-11 15:49:11,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:49:11,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 15:49:11,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 15:49:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:49:11,027 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) [2024-11-11 15:49:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:11,061 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-11 15:49:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 15:49:11,062 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 [2024-11-11 15:49:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:11,063 INFO L225 Difference]: With dead ends: 34 [2024-11-11 15:49:11,063 INFO L226 Difference]: Without dead ends: 26 [2024-11-11 15:49:11,063 INFO L434 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 [2024-11-11 15:49:11,064 INFO L435 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 [2024-11-11 15:49:11,066 INFO L436 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] [2024-11-11 15:49:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-11 15:49:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2024-11-11 15:49:11,071 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) [2024-11-11 15:49:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-11 15:49:11,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 18 [2024-11-11 15:49:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:11,073 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-11 15:49:11,073 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) [2024-11-11 15:49:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-11 15:49:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 15:49:11,074 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:11,074 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:11,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 15:49:11,074 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:11,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash -506086443, now seen corresponding path program 1 times [2024-11-11 15:49:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:11,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502852504] [2024-11-11 15:49:11,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:11,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502852504] [2024-11-11 15:49:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502852504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546292190] [2024-11-11 15:49:11,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:11,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:11,510 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) [2024-11-11 15:49:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 15:49:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:11,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-11 15:49:11,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:11,625 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 [2024-11-11 15:49:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:11,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:11,798 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-11 15:49:11,798 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 [2024-11-11 15:49:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546292190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:11,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:11,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-11 15:49:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739556426] [2024-11-11 15:49:11,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:11,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-11 15:49:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-11 15:49:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-11 15:49:11,823 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) [2024-11-11 15:49:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:11,925 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-11-11 15:49:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 15:49:11,925 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 [2024-11-11 15:49:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:11,926 INFO L225 Difference]: With dead ends: 26 [2024-11-11 15:49:11,926 INFO L226 Difference]: Without dead ends: 24 [2024-11-11 15:49:11,926 INFO L434 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 [2024-11-11 15:49:11,927 INFO L435 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 [2024-11-11 15:49:11,927 INFO L436 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] [2024-11-11 15:49:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-11 15:49:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-11-11 15:49:11,933 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) [2024-11-11 15:49:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-11 15:49:11,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2024-11-11 15:49:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:11,934 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-11 15:49:11,934 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) [2024-11-11 15:49:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-11 15:49:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-11 15:49:11,934 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:11,935 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:11,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:12,139 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 [2024-11-11 15:49:12,140 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:12,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1327390603, now seen corresponding path program 1 times [2024-11-11 15:49:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:12,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831308547] [2024-11-11 15:49:12,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:12,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:49:12,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:12,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831308547] [2024-11-11 15:49:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831308547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:12,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959739609] [2024-11-11 15:49:12,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:12,232 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) [2024-11-11 15:49:12,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 15:49:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-11 15:49:12,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:49:12,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:49:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959739609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:12,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:12,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-11 15:49:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399502937] [2024-11-11 15:49:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:12,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 15:49:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 15:49:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-11 15:49:12,382 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) [2024-11-11 15:49:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:12,453 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-11 15:49:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 15:49:12,454 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 [2024-11-11 15:49:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:12,454 INFO L225 Difference]: With dead ends: 41 [2024-11-11 15:49:12,454 INFO L226 Difference]: Without dead ends: 32 [2024-11-11 15:49:12,455 INFO L434 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 [2024-11-11 15:49:12,456 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-11 15:49:12,457 INFO L436 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] [2024-11-11 15:49:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-11 15:49:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2024-11-11 15:49:12,461 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) [2024-11-11 15:49:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-11 15:49:12,462 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 24 [2024-11-11 15:49:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:12,462 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-11 15:49:12,462 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) [2024-11-11 15:49:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-11 15:49:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 15:49:12,462 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:12,462 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:12,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 15:49:12,666 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 [2024-11-11 15:49:12,667 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:12,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2146579159, now seen corresponding path program 2 times [2024-11-11 15:49:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422438244] [2024-11-11 15:49:12,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:12,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:12,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422438244] [2024-11-11 15:49:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422438244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:12,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807399285] [2024-11-11 15:49:12,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:49:12,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:12,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:12,977 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) [2024-11-11 15:49:12,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 15:49:13,033 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:49:13,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:13,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-11 15:49:13,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:13,111 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 [2024-11-11 15:49:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:49:13,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:13,405 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-11 15:49:13,406 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 [2024-11-11 15:49:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807399285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:13,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 23 [2024-11-11 15:49:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365137944] [2024-11-11 15:49:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:13,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-11 15:49:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-11 15:49:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-11 15:49:13,467 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) [2024-11-11 15:49:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:13,681 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-11 15:49:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 15:49:13,682 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 [2024-11-11 15:49:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:13,683 INFO L225 Difference]: With dead ends: 32 [2024-11-11 15:49:13,683 INFO L226 Difference]: Without dead ends: 30 [2024-11-11 15:49:13,683 INFO L434 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 [2024-11-11 15:49:13,684 INFO L435 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 [2024-11-11 15:49:13,684 INFO L436 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] [2024-11-11 15:49:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-11 15:49:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-11-11 15:49:13,691 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) [2024-11-11 15:49:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-11 15:49:13,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 26 [2024-11-11 15:49:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:13,692 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-11 15:49:13,692 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) [2024-11-11 15:49:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-11 15:49:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-11 15:49:13,694 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:13,695 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:13,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:13,895 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 [2024-11-11 15:49:13,896 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:13,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash 92645087, now seen corresponding path program 3 times [2024-11-11 15:49:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:13,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055000126] [2024-11-11 15:49:13,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:14,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:14,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:14,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:14,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055000126] [2024-11-11 15:49:14,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055000126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:14,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342370336] [2024-11-11 15:49:14,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:49:14,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:14,282 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) [2024-11-11 15:49:14,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 15:49:14,345 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 15:49:14,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:14,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-11 15:49:14,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:14,384 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 [2024-11-11 15:49:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-11 15:49:14,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:14,770 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 [2024-11-11 15:49:14,774 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-11 15:49:14,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:14,779 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 [2024-11-11 15:49:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:14,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:15,040 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2024-11-11 15:49:15,041 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 [2024-11-11 15:49:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342370336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:15,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:15,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-11 15:49:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277230176] [2024-11-11 15:49:15,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:15,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-11 15:49:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-11 15:49:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:49:15,093 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) [2024-11-11 15:49:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:16,173 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-11-11 15:49:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-11 15:49:16,174 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 [2024-11-11 15:49:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:16,174 INFO L225 Difference]: With dead ends: 87 [2024-11-11 15:49:16,174 INFO L226 Difference]: Without dead ends: 85 [2024-11-11 15:49:16,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=612, Invalid=2468, Unknown=0, NotChecked=0, Total=3080 [2024-11-11 15:49:16,176 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-11-11 15:49:16,176 INFO L436 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] [2024-11-11 15:49:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-11 15:49:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2024-11-11 15:49:16,188 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) [2024-11-11 15:49:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-11 15:49:16,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 30 [2024-11-11 15:49:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:16,189 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-11 15:49:16,189 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) [2024-11-11 15:49:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-11 15:49:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 15:49:16,190 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:16,190 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:16,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 15:49:16,390 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 [2024-11-11 15:49:16,391 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:16,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash -210913899, now seen corresponding path program 4 times [2024-11-11 15:49:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:16,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854037987] [2024-11-11 15:49:16,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:16,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:16,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854037987] [2024-11-11 15:49:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854037987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515305951] [2024-11-11 15:49:16,835 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:49:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:16,837 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) [2024-11-11 15:49:16,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 15:49:16,898 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:49:16,899 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:16,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-11 15:49:16,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:16,914 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 [2024-11-11 15:49:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:16,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:16,977 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 [2024-11-11 15:49:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:17,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:17,581 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-11 15:49:17,581 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 [2024-11-11 15:49:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515305951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:17,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2024-11-11 15:49:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357842197] [2024-11-11 15:49:17,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:17,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-11 15:49:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-11 15:49:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-11-11 15:49:17,610 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) [2024-11-11 15:49:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:18,325 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2024-11-11 15:49:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-11 15:49:18,326 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 [2024-11-11 15:49:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:18,326 INFO L225 Difference]: With dead ends: 100 [2024-11-11 15:49:18,326 INFO L226 Difference]: Without dead ends: 71 [2024-11-11 15:49:18,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=734, Invalid=2806, Unknown=0, NotChecked=0, Total=3540 [2024-11-11 15:49:18,328 INFO L435 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 [2024-11-11 15:49:18,328 INFO L436 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] [2024-11-11 15:49:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-11 15:49:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2024-11-11 15:49:18,337 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) [2024-11-11 15:49:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-11 15:49:18,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2024-11-11 15:49:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:18,338 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-11 15:49:18,338 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) [2024-11-11 15:49:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-11 15:49:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 15:49:18,339 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:18,339 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:18,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 15:49:18,539 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 [2024-11-11 15:49:18,540 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:18,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1409886821, now seen corresponding path program 5 times [2024-11-11 15:49:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:18,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384014778] [2024-11-11 15:49:18,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:18,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:18,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:18,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:18,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384014778] [2024-11-11 15:49:18,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384014778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025041247] [2024-11-11 15:49:18,897 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:49:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:18,899 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) [2024-11-11 15:49:18,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 15:49:18,966 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-11 15:49:18,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:18,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-11 15:49:18,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:18,999 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 [2024-11-11 15:49:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:19,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:19,052 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 [2024-11-11 15:49:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:19,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:19,482 INFO L349 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2024-11-11 15:49:19,482 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 [2024-11-11 15:49:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:19,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025041247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:19,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:19,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-11-11 15:49:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531489823] [2024-11-11 15:49:19,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:19,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-11 15:49:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-11 15:49:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2024-11-11 15:49:19,548 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) [2024-11-11 15:49:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:19,871 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-11-11 15:49:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-11 15:49:19,872 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 [2024-11-11 15:49:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:19,872 INFO L225 Difference]: With dead ends: 85 [2024-11-11 15:49:19,872 INFO L226 Difference]: Without dead ends: 83 [2024-11-11 15:49:19,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 15:49:19,873 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-11-11 15:49:19,873 INFO L436 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] [2024-11-11 15:49:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-11 15:49:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 37. [2024-11-11 15:49:19,881 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) [2024-11-11 15:49:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-11 15:49:19,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2024-11-11 15:49:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:19,881 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-11 15:49:19,881 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) [2024-11-11 15:49:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-11 15:49:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 15:49:19,882 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:19,882 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:19,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:20,082 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 [2024-11-11 15:49:20,083 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:20,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1057244567, now seen corresponding path program 6 times [2024-11-11 15:49:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460393036] [2024-11-11 15:49:20,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:20,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:20,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460393036] [2024-11-11 15:49:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460393036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897439390] [2024-11-11 15:49:20,530 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 15:49:20,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:20,532 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) [2024-11-11 15:49:20,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 15:49:20,592 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-11 15:49:20,593 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:20,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-11 15:49:20,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:20,614 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 [2024-11-11 15:49:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:20,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:20,677 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 [2024-11-11 15:49:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:21,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:21,348 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-11 15:49:21,348 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 [2024-11-11 15:49:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897439390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:21,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-11-11 15:49:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844257453] [2024-11-11 15:49:21,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:21,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-11 15:49:21,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-11 15:49:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 15:49:21,411 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) [2024-11-11 15:49:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:22,218 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2024-11-11 15:49:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-11 15:49:22,219 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 [2024-11-11 15:49:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:22,220 INFO L225 Difference]: With dead ends: 102 [2024-11-11 15:49:22,220 INFO L226 Difference]: Without dead ends: 100 [2024-11-11 15:49:22,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=615, Invalid=3045, Unknown=0, NotChecked=0, Total=3660 [2024-11-11 15:49:22,221 INFO L435 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:49:22,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 320 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:49:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-11 15:49:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2024-11-11 15:49:22,238 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) [2024-11-11 15:49:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-11 15:49:22,240 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 40 [2024-11-11 15:49:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:22,241 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-11 15:49:22,241 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) [2024-11-11 15:49:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-11 15:49:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 15:49:22,242 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:22,242 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:22,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 15:49:22,442 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 [2024-11-11 15:49:22,443 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:22,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 389739551, now seen corresponding path program 7 times [2024-11-11 15:49:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:22,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509033683] [2024-11-11 15:49:22,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:22,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:22,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:22,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:22,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509033683] [2024-11-11 15:49:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509033683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106957960] [2024-11-11 15:49:22,967 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 15:49:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:22,974 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) [2024-11-11 15:49:22,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 15:49:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:23,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-11 15:49:23,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:23,098 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 [2024-11-11 15:49:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:23,160 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 [2024-11-11 15:49:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:23,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:23,246 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 [2024-11-11 15:49:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:49:23,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:24,261 INFO L349 Elim1Store]: treesize reduction 126, result has 17.6 percent of original size [2024-11-11 15:49:24,261 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 [2024-11-11 15:49:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106957960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:24,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:24,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 17] total 48 [2024-11-11 15:49:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509278451] [2024-11-11 15:49:24,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:24,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-11 15:49:24,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-11 15:49:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-11-11 15:49:24,311 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) [2024-11-11 15:49:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:25,612 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2024-11-11 15:49:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-11 15:49:25,612 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 [2024-11-11 15:49:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:25,613 INFO L225 Difference]: With dead ends: 163 [2024-11-11 15:49:25,613 INFO L226 Difference]: Without dead ends: 161 [2024-11-11 15:49:25,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1406, Invalid=6250, Unknown=0, NotChecked=0, Total=7656 [2024-11-11 15:49:25,615 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-11 15:49:25,615 INFO L436 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] [2024-11-11 15:49:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-11 15:49:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2024-11-11 15:49:25,632 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) [2024-11-11 15:49:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2024-11-11 15:49:25,632 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 44 [2024-11-11 15:49:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:25,632 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2024-11-11 15:49:25,633 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) [2024-11-11 15:49:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2024-11-11 15:49:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-11 15:49:25,633 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:25,633 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:25,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 15:49:25,837 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 [2024-11-11 15:49:25,838 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:25,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1664770773, now seen corresponding path program 8 times [2024-11-11 15:49:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513464520] [2024-11-11 15:49:25,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:25,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:25,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513464520] [2024-11-11 15:49:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513464520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389238928] [2024-11-11 15:49:25,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:49:25,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:25,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:25,971 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) [2024-11-11 15:49:25,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 15:49:26,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:49:26,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:26,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-11 15:49:26,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:26,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:26,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389238928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:26,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:26,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-11-11 15:49:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376150276] [2024-11-11 15:49:26,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:26,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-11 15:49:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-11 15:49:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2024-11-11 15:49:26,283 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) [2024-11-11 15:49:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:26,400 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2024-11-11 15:49:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 15:49:26,400 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 [2024-11-11 15:49:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:26,402 INFO L225 Difference]: With dead ends: 123 [2024-11-11 15:49:26,402 INFO L226 Difference]: Without dead ends: 91 [2024-11-11 15:49:26,403 INFO L434 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 [2024-11-11 15:49:26,403 INFO L435 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 [2024-11-11 15:49:26,404 INFO L436 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] [2024-11-11 15:49:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-11 15:49:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2024-11-11 15:49:26,437 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) [2024-11-11 15:49:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-11-11 15:49:26,437 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 48 [2024-11-11 15:49:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:26,438 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-11-11 15:49:26,438 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) [2024-11-11 15:49:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-11-11 15:49:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-11 15:49:26,439 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:26,439 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:26,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:26,639 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 [2024-11-11 15:49:26,640 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:26,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1255578655, now seen corresponding path program 9 times [2024-11-11 15:49:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92275951] [2024-11-11 15:49:26,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:27,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:27,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92275951] [2024-11-11 15:49:27,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92275951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187432084] [2024-11-11 15:49:27,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:49:27,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:27,142 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) [2024-11-11 15:49:27,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 15:49:27,281 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-11 15:49:27,281 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:27,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-11 15:49:27,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:27,367 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 [2024-11-11 15:49:27,432 INFO L349 Elim1Store]: treesize reduction 136, result has 13.9 percent of original size [2024-11-11 15:49:27,432 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 [2024-11-11 15:49:27,574 INFO L349 Elim1Store]: treesize reduction 327, result has 12.8 percent of original size [2024-11-11 15:49:27,575 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 [2024-11-11 15:49:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:28,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:28,967 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2024-11-11 15:49:28,967 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 [2024-11-11 15:49:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187432084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:29,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2024-11-11 15:49:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731792956] [2024-11-11 15:49:29,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:29,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-11 15:49:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-11 15:49:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2024-11-11 15:49:29,163 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) [2024-11-11 15:49:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:30,783 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2024-11-11 15:49:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-11 15:49:30,784 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 [2024-11-11 15:49:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:30,785 INFO L225 Difference]: With dead ends: 136 [2024-11-11 15:49:30,785 INFO L226 Difference]: Without dead ends: 134 [2024-11-11 15:49:30,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=568, Invalid=4402, Unknown=0, NotChecked=0, Total=4970 [2024-11-11 15:49:30,786 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 77 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 15:49:30,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1072 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 15:49:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-11 15:49:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 56. [2024-11-11 15:49:30,800 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) [2024-11-11 15:49:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2024-11-11 15:49:30,800 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 48 [2024-11-11 15:49:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:30,801 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2024-11-11 15:49:30,801 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) [2024-11-11 15:49:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2024-11-11 15:49:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 15:49:30,801 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:30,801 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:30,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:31,001 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 [2024-11-11 15:49:31,002 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:31,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1648208269, now seen corresponding path program 10 times [2024-11-11 15:49:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:31,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596407445] [2024-11-11 15:49:31,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:31,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:31,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:31,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596407445] [2024-11-11 15:49:31,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596407445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:31,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922547116] [2024-11-11 15:49:31,634 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:49:31,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:31,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:31,637 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) [2024-11-11 15:49:31,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 15:49:31,791 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:49:31,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:31,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-11 15:49:31,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:31,808 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 [2024-11-11 15:49:31,870 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:49:31,870 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 [2024-11-11 15:49:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:31,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:31,952 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 [2024-11-11 15:49:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:32,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:33,090 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2024-11-11 15:49:33,090 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 [2024-11-11 15:49:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922547116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:33,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:33,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2024-11-11 15:49:33,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722727990] [2024-11-11 15:49:33,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:33,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-11 15:49:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-11 15:49:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2024-11-11 15:49:33,182 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) [2024-11-11 15:49:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:34,616 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2024-11-11 15:49:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-11 15:49:34,617 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 [2024-11-11 15:49:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:34,617 INFO L225 Difference]: With dead ends: 153 [2024-11-11 15:49:34,617 INFO L226 Difference]: Without dead ends: 151 [2024-11-11 15:49:34,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1042, Invalid=5600, Unknown=0, NotChecked=0, Total=6642 [2024-11-11 15:49:34,619 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-11-11 15:49:34,619 INFO L436 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] [2024-11-11 15:49:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-11 15:49:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2024-11-11 15:49:34,652 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) [2024-11-11 15:49:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-11 15:49:34,653 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 50 [2024-11-11 15:49:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:34,653 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-11 15:49:34,653 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) [2024-11-11 15:49:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-11 15:49:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 15:49:34,654 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:34,654 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:34,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-11 15:49:34,854 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 [2024-11-11 15:49:34,854 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:34,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1210025175, now seen corresponding path program 11 times [2024-11-11 15:49:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:34,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872873439] [2024-11-11 15:49:34,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:35,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:35,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872873439] [2024-11-11 15:49:35,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872873439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491661093] [2024-11-11 15:49:35,486 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:49:35,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:35,487 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) [2024-11-11 15:49:35,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 15:49:35,597 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-11 15:49:35,597 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:35,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-11 15:49:35,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:35,608 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 [2024-11-11 15:49:35,671 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:49:35,671 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 [2024-11-11 15:49:35,762 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-11 15:49:35,762 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 [2024-11-11 15:49:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:35,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:35,879 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 [2024-11-11 15:49:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:37,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:37,647 INFO L349 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2024-11-11 15:49:37,647 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 [2024-11-11 15:49:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491661093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:37,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 57 [2024-11-11 15:49:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329469037] [2024-11-11 15:49:37,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:37,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-11 15:49:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-11 15:49:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2024-11-11 15:49:37,699 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) [2024-11-11 15:49:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:39,566 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2024-11-11 15:49:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-11 15:49:39,566 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 [2024-11-11 15:49:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:39,567 INFO L225 Difference]: With dead ends: 161 [2024-11-11 15:49:39,567 INFO L226 Difference]: Without dead ends: 159 [2024-11-11 15:49:39,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1292, Invalid=7080, Unknown=0, NotChecked=0, Total=8372 [2024-11-11 15:49:39,569 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 222 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 15:49:39,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 670 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 15:49:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-11 15:49:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 91. [2024-11-11 15:49:39,595 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) [2024-11-11 15:49:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2024-11-11 15:49:39,596 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 54 [2024-11-11 15:49:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:39,596 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2024-11-11 15:49:39,596 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) [2024-11-11 15:49:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2024-11-11 15:49:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 15:49:39,596 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:39,597 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:39,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:39,797 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 [2024-11-11 15:49:39,797 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:39,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1995434443, now seen corresponding path program 12 times [2024-11-11 15:49:39,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:39,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552177016] [2024-11-11 15:49:39,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:39,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:40,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:40,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552177016] [2024-11-11 15:49:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552177016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011085739] [2024-11-11 15:49:40,305 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 15:49:40,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:40,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:40,307 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) [2024-11-11 15:49:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 15:49:40,598 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-11 15:49:40,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:40,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-11 15:49:40,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:40,636 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 [2024-11-11 15:49:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,692 INFO L349 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2024-11-11 15:49:40,692 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 [2024-11-11 15:49:40,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:40,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:40,785 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 [2024-11-11 15:49:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:41,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:42,417 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2024-11-11 15:49:42,417 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 [2024-11-11 15:49:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011085739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:42,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 47 [2024-11-11 15:49:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302011121] [2024-11-11 15:49:42,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:42,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-11 15:49:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-11 15:49:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-11-11 15:49:42,587 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) [2024-11-11 15:49:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:43,511 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2024-11-11 15:49:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-11 15:49:43,511 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 [2024-11-11 15:49:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:43,512 INFO L225 Difference]: With dead ends: 168 [2024-11-11 15:49:43,512 INFO L226 Difference]: Without dead ends: 166 [2024-11-11 15:49:43,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2024-11-11 15:49:43,513 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 76 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-11-11 15:49:43,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 919 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-11 15:49:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-11 15:49:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 68. [2024-11-11 15:49:43,536 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) [2024-11-11 15:49:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-11 15:49:43,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 54 [2024-11-11 15:49:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:43,537 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-11 15:49:43,537 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) [2024-11-11 15:49:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-11 15:49:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-11 15:49:43,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:43,538 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:43,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:43,738 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 [2024-11-11 15:49:43,738 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:43,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1739500321, now seen corresponding path program 13 times [2024-11-11 15:49:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:43,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45123573] [2024-11-11 15:49:43,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:43,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:43,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:43,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:43,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45123573] [2024-11-11 15:49:43,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45123573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852850731] [2024-11-11 15:49:43,889 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 15:49:43,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:43,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:43,890 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) [2024-11-11 15:49:43,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-11 15:49:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:43,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-11 15:49:43,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:44,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:44,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852850731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:44,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:44,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-11-11 15:49:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230431979] [2024-11-11 15:49:44,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:44,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-11 15:49:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-11 15:49:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:49:44,211 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) [2024-11-11 15:49:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:44,332 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2024-11-11 15:49:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 15:49:44,332 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 [2024-11-11 15:49:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:44,333 INFO L225 Difference]: With dead ends: 128 [2024-11-11 15:49:44,333 INFO L226 Difference]: Without dead ends: 88 [2024-11-11 15:49:44,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2024-11-11 15:49:44,334 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-11-11 15:49:44,334 INFO L436 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] [2024-11-11 15:49:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-11 15:49:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2024-11-11 15:49:44,357 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) [2024-11-11 15:49:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-11-11 15:49:44,357 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 58 [2024-11-11 15:49:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:44,357 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-11-11 15:49:44,358 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) [2024-11-11 15:49:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-11-11 15:49:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-11 15:49:44,358 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:44,358 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:44,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-11 15:49:44,558 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 [2024-11-11 15:49:44,559 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:44,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1863591171, now seen corresponding path program 14 times [2024-11-11 15:49:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:44,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959596018] [2024-11-11 15:49:44,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:45,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:45,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:45,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:45,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959596018] [2024-11-11 15:49:45,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959596018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:45,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404299406] [2024-11-11 15:49:45,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:49:45,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:45,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:45,232 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) [2024-11-11 15:49:45,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-11 15:49:45,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:49:45,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:45,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-11 15:49:45,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:45,326 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 [2024-11-11 15:49:45,394 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:49:45,394 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 [2024-11-11 15:49:45,479 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-11 15:49:45,479 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 [2024-11-11 15:49:45,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:45,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:45,597 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 [2024-11-11 15:49:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:46,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:49:47,388 INFO L349 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2024-11-11 15:49:47,389 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 [2024-11-11 15:49:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404299406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:49:47,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:49:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 60 [2024-11-11 15:49:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321391622] [2024-11-11 15:49:47,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:49:47,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-11 15:49:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:49:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-11 15:49:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3073, Unknown=0, NotChecked=0, Total=3540 [2024-11-11 15:49:47,496 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) [2024-11-11 15:49:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:49:49,684 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2024-11-11 15:49:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-11 15:49:49,684 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 [2024-11-11 15:49:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:49:49,685 INFO L225 Difference]: With dead ends: 187 [2024-11-11 15:49:49,685 INFO L226 Difference]: Without dead ends: 185 [2024-11-11 15:49:49,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1383, Invalid=8319, Unknown=0, NotChecked=0, Total=9702 [2024-11-11 15:49:49,686 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 193 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 15:49:49,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 719 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 15:49:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-11 15:49:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 107. [2024-11-11 15:49:49,727 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) [2024-11-11 15:49:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2024-11-11 15:49:49,728 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 60 [2024-11-11 15:49:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:49:49,728 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2024-11-11 15:49:49,728 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) [2024-11-11 15:49:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2024-11-11 15:49:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-11 15:49:49,728 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:49:49,728 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:49:49,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-11 15:49:49,929 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 [2024-11-11 15:49:49,929 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:49:49,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:49:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash -141523289, now seen corresponding path program 15 times [2024-11-11 15:49:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:49:49,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990357679] [2024-11-11 15:49:49,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:49:49,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:49:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:50,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:49:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:50,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:49:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:49:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 3 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:50,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:49:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990357679] [2024-11-11 15:49:50,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990357679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:49:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173162967] [2024-11-11 15:49:50,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:49:50,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:49:50,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:49:50,642 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) [2024-11-11 15:49:50,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-11 15:49:50,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-11 15:49:50,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:49:50,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-11 15:49:50,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:49:51,103 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 [2024-11-11 15:49:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,179 INFO L349 Elim1Store]: treesize reduction 69, result has 21.6 percent of original size [2024-11-11 15:49:51,179 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 [2024-11-11 15:49:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,312 INFO L349 Elim1Store]: treesize reduction 171, result has 19.7 percent of original size [2024-11-11 15:49:51,313 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 [2024-11-11 15:49:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:49:51,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:49:51,488 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 [2024-11-11 15:49:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 168 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:49:59,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:00,111 INFO L349 Elim1Store]: treesize reduction 292, result has 12.3 percent of original size [2024-11-11 15:50:00,112 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 [2024-11-11 15:50:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 12 proven. 160 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:01,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173162967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:01,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:01,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 67 [2024-11-11 15:50:01,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725150488] [2024-11-11 15:50:01,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:01,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-11 15:50:01,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:01,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-11 15:50:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3981, Unknown=1, NotChecked=0, Total=4422 [2024-11-11 15:50:01,063 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) [2024-11-11 15:50:02,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 15:50:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:04,906 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2024-11-11 15:50:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-11 15:50:04,906 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 [2024-11-11 15:50:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:04,907 INFO L225 Difference]: With dead ends: 194 [2024-11-11 15:50:04,907 INFO L226 Difference]: Without dead ends: 192 [2024-11-11 15:50:04,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=875, Invalid=7866, Unknown=1, NotChecked=0, Total=8742 [2024-11-11 15:50:04,908 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 178 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.4s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:04,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1512 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2226 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-11-11 15:50:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-11 15:50:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 107. [2024-11-11 15:50:04,956 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) [2024-11-11 15:50:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2024-11-11 15:50:04,956 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 62 [2024-11-11 15:50:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:04,957 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2024-11-11 15:50:04,957 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) [2024-11-11 15:50:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2024-11-11 15:50:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-11 15:50:04,957 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:04,957 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:04,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-11 15:50:05,157 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 [2024-11-11 15:50:05,158 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:05,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash 977316531, now seen corresponding path program 16 times [2024-11-11 15:50:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944759637] [2024-11-11 15:50:05,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:05,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:05,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:05,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944759637] [2024-11-11 15:50:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944759637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547319024] [2024-11-11 15:50:05,963 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:50:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:05,965 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) [2024-11-11 15:50:05,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-11 15:50:06,199 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:50:06,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:06,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-11 15:50:06,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:06,211 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 [2024-11-11 15:50:06,280 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:50:06,280 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 [2024-11-11 15:50:06,384 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-11 15:50:06,385 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 [2024-11-11 15:50:06,513 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-11 15:50:06,513 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 [2024-11-11 15:50:06,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:06,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:50:06,659 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 [2024-11-11 15:50:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:08,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:09,098 INFO L349 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2024-11-11 15:50:09,099 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 [2024-11-11 15:50:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547319024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:09,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 25] total 66 [2024-11-11 15:50:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486868067] [2024-11-11 15:50:09,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:09,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-11 15:50:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-11 15:50:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2024-11-11 15:50:09,160 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) [2024-11-11 15:50:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:11,997 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2024-11-11 15:50:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-11 15:50:11,998 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 [2024-11-11 15:50:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:11,999 INFO L225 Difference]: With dead ends: 197 [2024-11-11 15:50:11,999 INFO L226 Difference]: Without dead ends: 195 [2024-11-11 15:50:12,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1679, Invalid=9877, Unknown=0, NotChecked=0, Total=11556 [2024-11-11 15:50:12,000 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 412 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:12,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 850 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 15:50:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-11 15:50:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 111. [2024-11-11 15:50:12,063 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) [2024-11-11 15:50:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2024-11-11 15:50:12,063 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 64 [2024-11-11 15:50:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:12,063 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2024-11-11 15:50:12,063 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) [2024-11-11 15:50:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2024-11-11 15:50:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-11 15:50:12,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:12,064 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:12,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-11 15:50:12,264 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 [2024-11-11 15:50:12,265 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:12,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 569602397, now seen corresponding path program 17 times [2024-11-11 15:50:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924020564] [2024-11-11 15:50:12,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:12,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:12,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 197 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924020564] [2024-11-11 15:50:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924020564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718376007] [2024-11-11 15:50:12,932 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:50:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:12,934 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) [2024-11-11 15:50:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-11 15:50:13,228 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-11 15:50:13,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:13,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 15:50:13,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:13,279 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 [2024-11-11 15:50:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:50:13,352 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 [2024-11-11 15:50:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:13,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:50:13,464 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 [2024-11-11 15:50:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:14,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:15,255 INFO L349 Elim1Store]: treesize reduction 138, result has 18.3 percent of original size [2024-11-11 15:50:15,255 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 [2024-11-11 15:50:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 6 proven. 192 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718376007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:15,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:15,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 60 [2024-11-11 15:50:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89580282] [2024-11-11 15:50:15,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:15,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-11 15:50:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-11 15:50:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3171, Unknown=0, NotChecked=0, Total=3540 [2024-11-11 15:50:15,524 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) [2024-11-11 15:50:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:17,447 INFO L93 Difference]: Finished difference Result 208 states and 219 transitions. [2024-11-11 15:50:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-11 15:50:17,447 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 [2024-11-11 15:50:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:17,448 INFO L225 Difference]: With dead ends: 208 [2024-11-11 15:50:17,448 INFO L226 Difference]: Without dead ends: 206 [2024-11-11 15:50:17,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=709, Invalid=7123, Unknown=0, NotChecked=0, Total=7832 [2024-11-11 15:50:17,449 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 215 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:17,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1594 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-11 15:50:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-11 15:50:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 80. [2024-11-11 15:50:17,498 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) [2024-11-11 15:50:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-11-11 15:50:17,498 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 66 [2024-11-11 15:50:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:17,498 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-11-11 15:50:17,498 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) [2024-11-11 15:50:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-11-11 15:50:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-11 15:50:17,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:17,499 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-11 15:50:17,699 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 [2024-11-11 15:50:17,700 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:17,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2003128471, now seen corresponding path program 18 times [2024-11-11 15:50:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:17,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24173305] [2024-11-11 15:50:17,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:17,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:17,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24173305] [2024-11-11 15:50:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24173305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729517866] [2024-11-11 15:50:17,908 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 15:50:17,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:17,910 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) [2024-11-11 15:50:17,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-11 15:50:18,263 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-11 15:50:18,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:18,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-11 15:50:18,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:18,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:18,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729517866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:18,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:18,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2024-11-11 15:50:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047314072] [2024-11-11 15:50:18,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:18,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-11 15:50:18,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-11 15:50:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2024-11-11 15:50:18,612 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) [2024-11-11 15:50:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:18,802 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2024-11-11 15:50:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-11 15:50:18,803 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 [2024-11-11 15:50:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:18,803 INFO L225 Difference]: With dead ends: 152 [2024-11-11 15:50:18,803 INFO L226 Difference]: Without dead ends: 104 [2024-11-11 15:50:18,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=1055, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 15:50:18,804 INFO L435 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 [2024-11-11 15:50:18,804 INFO L436 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] [2024-11-11 15:50:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-11 15:50:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2024-11-11 15:50:18,850 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) [2024-11-11 15:50:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-11-11 15:50:18,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 68 [2024-11-11 15:50:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:18,851 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-11-11 15:50:18,851 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) [2024-11-11 15:50:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-11-11 15:50:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-11 15:50:18,852 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:18,852 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:18,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-11 15:50:19,052 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 [2024-11-11 15:50:19,052 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:19,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 823306247, now seen corresponding path program 19 times [2024-11-11 15:50:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137370801] [2024-11-11 15:50:19,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:19,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:19,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137370801] [2024-11-11 15:50:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137370801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638868064] [2024-11-11 15:50:19,972 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 15:50:19,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:19,975 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) [2024-11-11 15:50:19,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-11 15:50:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:20,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-11 15:50:20,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:20,220 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 [2024-11-11 15:50:20,308 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:50:20,308 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 [2024-11-11 15:50:20,419 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-11 15:50:20,419 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 [2024-11-11 15:50:20,571 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-11 15:50:20,572 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 [2024-11-11 15:50:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:20,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:50:20,733 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 [2024-11-11 15:50:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:50:22,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:23,601 INFO L349 Elim1Store]: treesize reduction 286, result has 14.1 percent of original size [2024-11-11 15:50:23,602 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 [2024-11-11 15:50:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638868064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:23,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:23,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 27] total 76 [2024-11-11 15:50:23,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639222014] [2024-11-11 15:50:23,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:23,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-11 15:50:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-11 15:50:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=5040, Unknown=0, NotChecked=0, Total=5700 [2024-11-11 15:50:23,788 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) [2024-11-11 15:50:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:28,055 INFO L93 Difference]: Finished difference Result 225 states and 236 transitions. [2024-11-11 15:50:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-11 15:50:28,056 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 [2024-11-11 15:50:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:28,057 INFO L225 Difference]: With dead ends: 225 [2024-11-11 15:50:28,057 INFO L226 Difference]: Without dead ends: 223 [2024-11-11 15:50:28,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2393, Invalid=15697, Unknown=0, NotChecked=0, Total=18090 [2024-11-11 15:50:28,058 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 271 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:28,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 880 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-11 15:50:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-11 15:50:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 127. [2024-11-11 15:50:28,155 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) [2024-11-11 15:50:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2024-11-11 15:50:28,156 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 70 [2024-11-11 15:50:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:28,156 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2024-11-11 15:50:28,156 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) [2024-11-11 15:50:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2024-11-11 15:50:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-11 15:50:28,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:28,157 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:28,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-11 15:50:28,357 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 [2024-11-11 15:50:28,358 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:28,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1597644099, now seen corresponding path program 20 times [2024-11-11 15:50:28,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:28,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963045426] [2024-11-11 15:50:28,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:28,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:29,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:29,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963045426] [2024-11-11 15:50:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963045426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861508295] [2024-11-11 15:50:29,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:50:29,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:29,407 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) [2024-11-11 15:50:29,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-11 15:50:29,541 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:50:29,541 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:29,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 15:50:29,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:29,554 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 [2024-11-11 15:50:29,628 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-11 15:50:29,628 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 [2024-11-11 15:50:29,725 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-11 15:50:29,725 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 [2024-11-11 15:50:29,856 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2024-11-11 15:50:29,856 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 [2024-11-11 15:50:30,018 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2024-11-11 15:50:30,018 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 [2024-11-11 15:50:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-11 15:50:30,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 15:50:30,193 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 [2024-11-11 15:50:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:32,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:33,723 INFO L349 Elim1Store]: treesize reduction 60, result has 38.1 percent of original size [2024-11-11 15:50:33,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 217 treesize of output 141 [2024-11-11 15:50:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861508295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:33,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 77 [2024-11-11 15:50:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571401933] [2024-11-11 15:50:33,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:33,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-11 15:50:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-11 15:50:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2024-11-11 15:50:33,803 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 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) [2024-11-11 15:50:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:37,669 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2024-11-11 15:50:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-11 15:50:37,670 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 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 74 [2024-11-11 15:50:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:37,671 INFO L225 Difference]: With dead ends: 233 [2024-11-11 15:50:37,671 INFO L226 Difference]: Without dead ends: 231 [2024-11-11 15:50:37,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2172, Invalid=13578, Unknown=0, NotChecked=0, Total=15750 [2024-11-11 15:50:37,672 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 469 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:37,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1018 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-11 15:50:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-11 15:50:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 131. [2024-11-11 15:50:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 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) [2024-11-11 15:50:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-11-11 15:50:37,772 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 74 [2024-11-11 15:50:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:37,772 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-11-11 15:50:37,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 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) [2024-11-11 15:50:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-11-11 15:50:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-11 15:50:37,772 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:37,773 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:37,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-11 15:50:37,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-11 15:50:37,973 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:37,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:37,973 INFO L85 PathProgramCache]: Analyzing trace with hash 978375283, now seen corresponding path program 21 times [2024-11-11 15:50:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28313887] [2024-11-11 15:50:37,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:37,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:38,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:38,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 243 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28313887] [2024-11-11 15:50:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28313887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031384084] [2024-11-11 15:50:38,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:50:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:38,244 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:50:38,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-11 15:50:38,646 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-11 15:50:38,646 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:38,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 15:50:38,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 288 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:38,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:50:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 288 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031384084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:50:39,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:50:39,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-11-11 15:50:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994588473] [2024-11-11 15:50:39,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:50:39,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-11 15:50:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:50:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-11 15:50:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 15:50:39,086 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 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) [2024-11-11 15:50:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:50:39,364 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2024-11-11 15:50:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-11 15:50:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 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 78 [2024-11-11 15:50:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:50:39,365 INFO L225 Difference]: With dead ends: 215 [2024-11-11 15:50:39,365 INFO L226 Difference]: Without dead ends: 159 [2024-11-11 15:50:39,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2024-11-11 15:50:39,366 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:50:39,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 256 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:50:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-11 15:50:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2024-11-11 15:50:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 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) [2024-11-11 15:50:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2024-11-11 15:50:39,468 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 78 [2024-11-11 15:50:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:50:39,469 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2024-11-11 15:50:39,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 38 states have internal predecessors, (129), 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) [2024-11-11 15:50:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2024-11-11 15:50:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-11 15:50:39,469 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:50:39,469 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:50:39,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-11 15:50:39,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:39,670 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:50:39,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:50:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash -951522683, now seen corresponding path program 22 times [2024-11-11 15:50:39,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:50:39,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400641458] [2024-11-11 15:50:39,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:50:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:50:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:40,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 15:50:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:40,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 15:50:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:50:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 1 proven. 305 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 15:50:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:50:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400641458] [2024-11-11 15:50:40,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400641458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:50:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276975310] [2024-11-11 15:50:40,511 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:50:40,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:50:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:50:40,512 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 15:50:40,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-11 15:50:41,634 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:50:41,634 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:50:41,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-11 15:50:41,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:50:41,815 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 36 treesize of output 37 [2024-11-11 15:50:41,892 INFO L349 Elim1Store]: treesize reduction 142, result has 13.4 percent of original size [2024-11-11 15:50:41,892 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 83 treesize of output 89 [2024-11-11 15:50:42,045 INFO L349 Elim1Store]: treesize reduction 339, result has 12.4 percent of original size [2024-11-11 15:50:42,045 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 129 treesize of output 141