./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.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 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:49:43,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:49:43,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:49:43,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:49:43,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:49:43,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:49:43,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:49:43,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:49:43,446 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:49:43,448 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:49:43,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:49:43,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:49:43,450 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:49:43,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:49:43,453 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:49:43,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:49:43,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:49:43,454 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:49:43,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:49:43,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:49:43,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:49:43,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:49:43,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:49:43,456 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:49:43,456 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:49:43,457 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:49:43,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:49:43,457 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:49:43,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:49:43,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:49:43,458 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:49:43,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:49:43,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:49:43,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:49:43,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:49:43,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:49:43,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:49:43,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:49:43,460 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:49:43,461 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:49:43,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:49:43,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:49:43,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a [2024-10-12 14:49:43,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:49:43,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:49:43,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:49:43,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:49:43,769 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:49:43,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c [2024-10-12 14:49:45,290 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:49:45,493 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:49:45,494 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c [2024-10-12 14:49:45,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b57b924/efc670182d9a4989a6a41b2bcdee58a1/FLAG429a15638 [2024-10-12 14:49:45,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40b57b924/efc670182d9a4989a6a41b2bcdee58a1 [2024-10-12 14:49:45,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:49:45,526 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:49:45,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:49:45,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:49:45,535 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:49:45,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e706c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45, skipping insertion in model container [2024-10-12 14:49:45,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,561 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:49:45,746 WARN L248 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-crafted/zero_sum2.c[400,413] [2024-10-12 14:49:45,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:49:45,776 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:49:45,787 WARN L248 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-crafted/zero_sum2.c[400,413] [2024-10-12 14:49:45,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:49:45,807 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:49:45,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45 WrapperNode [2024-10-12 14:49:45,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:49:45,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:49:45,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:49:45,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:49:45,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,838 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-10-12 14:49:45,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:49:45,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:49:45,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:49:45,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:49:45,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,864 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-12 14:49:45,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:49:45,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:49:45,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:49:45,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:49:45,884 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (1/1) ... [2024-10-12 14:49:45,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:49:45,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:45,927 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) [2024-10-12 14:49:45,929 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 [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:49:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:49:45,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:49:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:49:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:49:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:49:46,036 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:49:46,037 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:49:46,190 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 14:49:46,190 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:49:46,224 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:49:46,224 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-12 14:49:46,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:49:46 BoogieIcfgContainer [2024-10-12 14:49:46,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:49:46,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:49:46,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:49:46,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:49:46,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:49:45" (1/3) ... [2024-10-12 14:49:46,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db26aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:49:46, skipping insertion in model container [2024-10-12 14:49:46,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:45" (2/3) ... [2024-10-12 14:49:46,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db26aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:49:46, skipping insertion in model container [2024-10-12 14:49:46,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:49:46" (3/3) ... [2024-10-12 14:49:46,236 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2024-10-12 14:49:46,254 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:49:46,255 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:49:46,311 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:49:46,317 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;@5f7d30a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:49:46,318 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:49:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:49:46,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:46,332 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:46,332 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:46,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1123727691, now seen corresponding path program 1 times [2024-10-12 14:49:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:46,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583374066] [2024-10-12 14:49:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:46,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:46,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:46,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583374066] [2024-10-12 14:49:46,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583374066] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:46,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:49:46,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:49:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769489062] [2024-10-12 14:49:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:46,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:49:46,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:49:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:49:46,536 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:46,580 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2024-10-12 14:49:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:49:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:49:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:46,588 INFO L225 Difference]: With dead ends: 33 [2024-10-12 14:49:46,588 INFO L226 Difference]: Without dead ends: 15 [2024-10-12 14:49:46,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:49:46,594 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:46,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-12 14:49:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-12 14:49:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-10-12 14:49:46,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 14 [2024-10-12 14:49:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:46,624 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-10-12 14:49:46,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-10-12 14:49:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:49:46,625 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:46,625 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:46,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:49:46,626 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:46,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash 349231377, now seen corresponding path program 1 times [2024-10-12 14:49:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930630102] [2024-10-12 14:49:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930630102] [2024-10-12 14:49:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930630102] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:46,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:49:46,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:49:46,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314792045] [2024-10-12 14:49:46,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:46,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:49:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:46,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:49:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:49:46,801 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:46,839 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2024-10-12 14:49:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:49:46,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:49:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:46,840 INFO L225 Difference]: With dead ends: 28 [2024-10-12 14:49:46,841 INFO L226 Difference]: Without dead ends: 16 [2024-10-12 14:49:46,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:49:46,845 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:46,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-12 14:49:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-12 14:49:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-10-12 14:49:46,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2024-10-12 14:49:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:46,852 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-10-12 14:49:46,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-10-12 14:49:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 14:49:46,852 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:46,853 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:46,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:49:46,853 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:46,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash 261767879, now seen corresponding path program 1 times [2024-10-12 14:49:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781933508] [2024-10-12 14:49:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:49:46,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781933508] [2024-10-12 14:49:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781933508] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:47,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:49:47,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:49:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891127403] [2024-10-12 14:49:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:47,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:49:47,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:49:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:49:47,004 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:47,056 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2024-10-12 14:49:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:49:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-12 14:49:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:47,058 INFO L225 Difference]: With dead ends: 30 [2024-10-12 14:49:47,058 INFO L226 Difference]: Without dead ends: 20 [2024-10-12 14:49:47,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:49:47,059 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:47,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-12 14:49:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-12 14:49:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 14:49:47,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2024-10-12 14:49:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:47,067 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 14:49:47,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 14:49:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 14:49:47,069 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:47,070 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:47,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:49:47,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:47,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1326628341, now seen corresponding path program 1 times [2024-10-12 14:49:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220121031] [2024-10-12 14:49:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:49:47,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220121031] [2024-10-12 14:49:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220121031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492738288] [2024-10-12 14:49:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:47,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:47,198 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) [2024-10-12 14:49:47,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:49:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:47,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:49:47,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:49:47,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:49:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492738288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:47,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-12 14:49:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280371867] [2024-10-12 14:49:47,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:47,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 14:49:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 14:49:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:49:47,377 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:47,419 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-10-12 14:49:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:49:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-12 14:49:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:47,420 INFO L225 Difference]: With dead ends: 37 [2024-10-12 14:49:47,420 INFO L226 Difference]: Without dead ends: 21 [2024-10-12 14:49:47,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:49:47,422 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:47,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-12 14:49:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-12 14:49:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-12 14:49:47,431 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2024-10-12 14:49:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:47,431 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-12 14:49:47,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-12 14:49:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 14:49:47,432 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:47,432 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:47,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:47,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:47,633 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:47,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1865382421, now seen corresponding path program 2 times [2024-10-12 14:49:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:47,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943838056] [2024-10-12 14:49:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:47,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:49:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943838056] [2024-10-12 14:49:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943838056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741676767] [2024-10-12 14:49:47,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:49:47,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:47,741 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) [2024-10-12 14:49:47,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:49:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:49:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:47,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:49:47,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:49:47,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:49:47,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741676767] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:47,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:47,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-12 14:49:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502564473] [2024-10-12 14:49:47,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:47,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:49:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:49:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:49:47,966 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:48,018 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-10-12 14:49:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:49:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-12 14:49:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:48,019 INFO L225 Difference]: With dead ends: 38 [2024-10-12 14:49:48,020 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 14:49:48,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:49:48,021 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:48,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 14:49:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 14:49:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-12 14:49:48,029 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2024-10-12 14:49:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:48,029 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-12 14:49:48,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-12 14:49:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 14:49:48,032 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:48,032 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:48,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:49:48,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:48,233 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:48,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 909538577, now seen corresponding path program 3 times [2024-10-12 14:49:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434343548] [2024-10-12 14:49:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:49,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434343548] [2024-10-12 14:49:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434343548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169316696] [2024-10-12 14:49:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:49:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:49,606 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) [2024-10-12 14:49:49,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:49:49,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-12 14:49:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:49,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 14:49:49,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:49,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-12 14:49:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:49,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:49:50,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169316696] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:50,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:50,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2024-10-12 14:49:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391679115] [2024-10-12 14:49:50,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:50,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 14:49:50,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 14:49:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:49:50,045 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:50,223 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-10-12 14:49:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:49:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-12 14:49:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:50,224 INFO L225 Difference]: With dead ends: 42 [2024-10-12 14:49:50,224 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 14:49:50,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:49:50,226 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:50,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:49:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 14:49:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-10-12 14:49:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-10-12 14:49:50,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2024-10-12 14:49:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:50,240 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-10-12 14:49:50,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-10-12 14:49:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:49:50,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:50,242 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:50,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:49:50,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:50,444 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:50,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1120376093, now seen corresponding path program 4 times [2024-10-12 14:49:50,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:50,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542333616] [2024-10-12 14:49:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:50,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:49:50,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542333616] [2024-10-12 14:49:50,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542333616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759025925] [2024-10-12 14:49:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:49:50,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:50,568 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) [2024-10-12 14:49:50,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:49:50,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:49:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:50,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:49:50,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:49:50,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:49:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759025925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:50,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:50,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-12 14:49:50,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431001992] [2024-10-12 14:49:50,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:50,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 14:49:50,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 14:49:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:49:50,771 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:50,934 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-10-12 14:49:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:49:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-12 14:49:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:50,936 INFO L225 Difference]: With dead ends: 75 [2024-10-12 14:49:50,936 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 14:49:50,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:49:50,937 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:50,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 14:49:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-10-12 14:49:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-12 14:49:50,944 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2024-10-12 14:49:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:50,945 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-12 14:49:50,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-12 14:49:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:49:50,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:50,945 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:50,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:49:51,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:51,150 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:51,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -209725766, now seen corresponding path program 5 times [2024-10-12 14:49:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:51,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329883777] [2024-10-12 14:49:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:51,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329883777] [2024-10-12 14:49:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329883777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980873862] [2024-10-12 14:49:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:49:51,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:51,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:51,268 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) [2024-10-12 14:49:51,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:49:51,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-12 14:49:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:51,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:49:51,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:51,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:51,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980873862] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:51,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:51,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 14:49:51,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362003674] [2024-10-12 14:49:51,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:51,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:49:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:49:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:49:51,491 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:51,576 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-12 14:49:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 14:49:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-12 14:49:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:51,578 INFO L225 Difference]: With dead ends: 42 [2024-10-12 14:49:51,578 INFO L226 Difference]: Without dead ends: 30 [2024-10-12 14:49:51,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-12 14:49:51,579 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:51,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-12 14:49:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-12 14:49:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-10-12 14:49:51,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2024-10-12 14:49:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:51,585 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-10-12 14:49:51,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-10-12 14:49:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 14:49:51,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:51,586 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:51,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:49:51,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:51,787 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:51,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash -360312821, now seen corresponding path program 6 times [2024-10-12 14:49:51,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:51,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949257025] [2024-10-12 14:49:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:53,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949257025] [2024-10-12 14:49:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949257025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561345863] [2024-10-12 14:49:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:49:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:53,440 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) [2024-10-12 14:49:53,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:49:53,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-12 14:49:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:53,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-12 14:49:53,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:49:53,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:54,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:54,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-10-12 14:49:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:49:54,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561345863] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:54,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 38 [2024-10-12 14:49:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45721563] [2024-10-12 14:49:54,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:54,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:49:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:49:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:49:54,330 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:54,957 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-10-12 14:49:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:49:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-12 14:49:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:54,958 INFO L225 Difference]: With dead ends: 50 [2024-10-12 14:49:54,959 INFO L226 Difference]: Without dead ends: 46 [2024-10-12 14:49:54,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2024-10-12 14:49:54,960 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:54,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 82 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:49:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-12 14:49:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-10-12 14:49:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-10-12 14:49:54,967 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2024-10-12 14:49:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:54,967 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-10-12 14:49:54,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-10-12 14:49:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 14:49:54,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:54,969 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:54,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:55,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:55,173 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:55,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1171913621, now seen corresponding path program 7 times [2024-10-12 14:49:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:55,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079770557] [2024-10-12 14:49:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 14:49:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079770557] [2024-10-12 14:49:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079770557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214771674] [2024-10-12 14:49:55,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:49:55,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:55,296 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) [2024-10-12 14:49:55,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:49:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:55,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:49:55,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 14:49:55,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 14:49:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214771674] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:55,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:55,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 14:49:55,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034193574] [2024-10-12 14:49:55,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:55,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 14:49:55,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 14:49:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:49:55,517 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:55,609 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2024-10-12 14:49:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:49:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-12 14:49:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:55,610 INFO L225 Difference]: With dead ends: 84 [2024-10-12 14:49:55,610 INFO L226 Difference]: Without dead ends: 44 [2024-10-12 14:49:55,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:49:55,611 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:55,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-12 14:49:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-12 14:49:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-12 14:49:55,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 30 [2024-10-12 14:49:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:55,618 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-12 14:49:55,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-12 14:49:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-12 14:49:55,619 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:55,619 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:55,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 14:49:55,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:55,824 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:55,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 130105889, now seen corresponding path program 8 times [2024-10-12 14:49:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:55,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725309939] [2024-10-12 14:49:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:49:55,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725309939] [2024-10-12 14:49:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725309939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364510586] [2024-10-12 14:49:55,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:49:55,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:55,958 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) [2024-10-12 14:49:55,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:49:56,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:49:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:56,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:49:56,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:49:56,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 14:49:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364510586] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:56,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 14:49:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287508214] [2024-10-12 14:49:56,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:56,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 14:49:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 14:49:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:49:56,201 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:56,302 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-10-12 14:49:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:49:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-12 14:49:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:56,303 INFO L225 Difference]: With dead ends: 62 [2024-10-12 14:49:56,303 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 14:49:56,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:49:56,304 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:56,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 14:49:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-12 14:49:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-12 14:49:56,310 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2024-10-12 14:49:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:56,310 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-12 14:49:56,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:49:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-12 14:49:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 14:49:56,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:56,311 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:56,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:56,512 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,SelfDestructingSolverStorable10 [2024-10-12 14:49:56,512 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:56,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1688059631, now seen corresponding path program 9 times [2024-10-12 14:49:56,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:56,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262124442] [2024-10-12 14:49:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:56,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:49:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262124442] [2024-10-12 14:49:58,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262124442] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793890014] [2024-10-12 14:49:58,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:49:58,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:58,440 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) [2024-10-12 14:49:58,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:49:58,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:49:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:58,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-12 14:49:58,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:59,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:59,235 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 19 treesize of output 16 [2024-10-12 14:49:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:49:59,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:59,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:59,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-10-12 14:50:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:50:00,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793890014] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:00,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:00,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 17] total 55 [2024-10-12 14:50:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961648634] [2024-10-12 14:50:00,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:00,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-12 14:50:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-12 14:50:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2769, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:50:00,209 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:01,703 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-10-12 14:50:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 14:50:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-12 14:50:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:01,704 INFO L225 Difference]: With dead ends: 58 [2024-10-12 14:50:01,704 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 14:50:01,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=408, Invalid=4704, Unknown=0, NotChecked=0, Total=5112 [2024-10-12 14:50:01,707 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:01,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 14:50:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 14:50:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-10-12 14:50:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-10-12 14:50:01,721 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2024-10-12 14:50:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:01,721 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-10-12 14:50:01,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-10-12 14:50:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 14:50:01,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:01,723 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:01,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:50:01,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:01,926 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:01,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1559355427, now seen corresponding path program 10 times [2024-10-12 14:50:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:01,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450432803] [2024-10-12 14:50:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 14:50:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450432803] [2024-10-12 14:50:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450432803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695630529] [2024-10-12 14:50:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:50:02,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:02,109 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) [2024-10-12 14:50:02,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:50:02,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:50:02,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:02,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:50:02,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 14:50:02,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 14:50:02,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695630529] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:02,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:02,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-10-12 14:50:02,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825796470] [2024-10-12 14:50:02,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:02,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 14:50:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 14:50:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-10-12 14:50:02,479 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:02,723 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2024-10-12 14:50:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 14:50:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-12 14:50:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:02,725 INFO L225 Difference]: With dead ends: 103 [2024-10-12 14:50:02,725 INFO L226 Difference]: Without dead ends: 56 [2024-10-12 14:50:02,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:50:02,726 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:02,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:50:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-12 14:50:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-10-12 14:50:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-10-12 14:50:02,737 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2024-10-12 14:50:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:02,737 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-10-12 14:50:02,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-10-12 14:50:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 14:50:02,738 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:02,739 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:02,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 14:50:02,940 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,SelfDestructingSolverStorable12 [2024-10-12 14:50:02,941 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:02,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash 230767034, now seen corresponding path program 11 times [2024-10-12 14:50:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:02,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626997997] [2024-10-12 14:50:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:02,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:50:03,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626997997] [2024-10-12 14:50:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626997997] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966257656] [2024-10-12 14:50:03,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:50:03,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:03,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:03,097 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) [2024-10-12 14:50:03,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:50:03,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-12 14:50:03,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:03,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:50:03,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:50:03,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 14:50:03,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966257656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:03,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:03,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-12 14:50:03,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389738666] [2024-10-12 14:50:03,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:03,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:50:03,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:50:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:50:03,427 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:03,527 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-10-12 14:50:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:50:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-12 14:50:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:03,528 INFO L225 Difference]: With dead ends: 56 [2024-10-12 14:50:03,528 INFO L226 Difference]: Without dead ends: 40 [2024-10-12 14:50:03,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:50:03,529 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:03,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-12 14:50:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-12 14:50:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-12 14:50:03,537 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2024-10-12 14:50:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:03,538 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-12 14:50:03,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-12 14:50:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:50:03,539 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:03,539 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:03,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 14:50:03,739 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,SelfDestructingSolverStorable13 [2024-10-12 14:50:03,740 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:03,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 167456267, now seen corresponding path program 12 times [2024-10-12 14:50:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:03,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327613016] [2024-10-12 14:50:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:06,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327613016] [2024-10-12 14:50:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327613016] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25313855] [2024-10-12 14:50:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:50:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:06,561 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) [2024-10-12 14:50:06,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:50:06,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-12 14:50:06,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:06,637 WARN L253 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-10-12 14:50:06,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:06,673 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 19 treesize of output 1 [2024-10-12 14:50:07,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:07,338 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 19 treesize of output 16 [2024-10-12 14:50:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:50:07,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:50:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25313855] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:08,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23, 18] total 61 [2024-10-12 14:50:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170870992] [2024-10-12 14:50:08,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:08,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-12 14:50:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-12 14:50:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-10-12 14:50:08,159 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:09,737 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-12 14:50:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-12 14:50:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-12 14:50:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:09,738 INFO L225 Difference]: With dead ends: 66 [2024-10-12 14:50:09,738 INFO L226 Difference]: Without dead ends: 62 [2024-10-12 14:50:09,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=488, Invalid=5832, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 14:50:09,740 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:09,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-12 14:50:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-12 14:50:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-10-12 14:50:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-10-12 14:50:09,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2024-10-12 14:50:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:09,753 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-10-12 14:50:09,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-10-12 14:50:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 14:50:09,754 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:09,754 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:09,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 14:50:09,954 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,SelfDestructingSolverStorable14 [2024-10-12 14:50:09,955 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:09,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1004601131, now seen corresponding path program 13 times [2024-10-12 14:50:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403437233] [2024-10-12 14:50:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 14:50:10,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:10,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403437233] [2024-10-12 14:50:10,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403437233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704828407] [2024-10-12 14:50:10,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:50:10,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:10,139 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) [2024-10-12 14:50:10,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:50:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:10,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:50:10,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 14:50:10,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-12 14:50:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704828407] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:10,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:10,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 14:50:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607747135] [2024-10-12 14:50:10,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:10,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 14:50:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 14:50:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:50:10,434 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:10,546 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2024-10-12 14:50:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:50:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-12 14:50:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:10,549 INFO L225 Difference]: With dead ends: 112 [2024-10-12 14:50:10,549 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 14:50:10,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:50:10,550 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:10,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 14:50:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-12 14:50:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-10-12 14:50:10,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2024-10-12 14:50:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:10,568 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-10-12 14:50:10,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-10-12 14:50:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 14:50:10,568 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:10,569 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:10,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 14:50:10,769 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,SelfDestructingSolverStorable15 [2024-10-12 14:50:10,770 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:10,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:10,770 INFO L85 PathProgramCache]: Analyzing trace with hash -588574367, now seen corresponding path program 14 times [2024-10-12 14:50:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:10,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514886486] [2024-10-12 14:50:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 14:50:11,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514886486] [2024-10-12 14:50:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514886486] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541889623] [2024-10-12 14:50:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:50:11,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:11,051 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) [2024-10-12 14:50:11,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 14:50:11,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:50:11,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:11,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:50:11,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 14:50:11,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 14:50:11,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541889623] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:11,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:11,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 14:50:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41891074] [2024-10-12 14:50:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:11,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 14:50:11,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:11,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 14:50:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:50:11,351 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:11,468 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-10-12 14:50:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:50:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-12 14:50:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:11,469 INFO L225 Difference]: With dead ends: 80 [2024-10-12 14:50:11,470 INFO L226 Difference]: Without dead ends: 45 [2024-10-12 14:50:11,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2024-10-12 14:50:11,471 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:11,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-12 14:50:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-12 14:50:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-10-12 14:50:11,479 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2024-10-12 14:50:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:11,479 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-10-12 14:50:11,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-10-12 14:50:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:50:11,480 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:11,480 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:11,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 14:50:11,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:11,685 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:11,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -422298351, now seen corresponding path program 15 times [2024-10-12 14:50:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609032673] [2024-10-12 14:50:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:15,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:15,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609032673] [2024-10-12 14:50:15,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609032673] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:15,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899039369] [2024-10-12 14:50:15,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:50:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:15,169 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) [2024-10-12 14:50:15,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 14:50:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 14:50:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:15,252 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-10-12 14:50:15,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:16,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:50:16,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:16,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2024-10-12 14:50:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:16,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:17,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:17,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2024-10-12 14:50:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 14:50:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899039369] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:17,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28, 21] total 78 [2024-10-12 14:50:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355087245] [2024-10-12 14:50:17,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:17,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-10-12 14:50:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-10-12 14:50:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=5504, Unknown=0, NotChecked=0, Total=6006 [2024-10-12 14:50:17,873 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 78 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 78 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:20,533 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2024-10-12 14:50:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-12 14:50:20,533 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 78 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-12 14:50:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:20,535 INFO L225 Difference]: With dead ends: 111 [2024-10-12 14:50:20,535 INFO L226 Difference]: Without dead ends: 106 [2024-10-12 14:50:20,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=959, Invalid=11251, Unknown=0, NotChecked=0, Total=12210 [2024-10-12 14:50:20,538 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:20,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 158 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-12 14:50:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-12 14:50:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2024-10-12 14:50:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2024-10-12 14:50:20,564 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 44 [2024-10-12 14:50:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:20,564 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2024-10-12 14:50:20,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.5128205128205128) internal successors, (118), 78 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2024-10-12 14:50:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-12 14:50:20,565 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:20,565 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:20,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-12 14:50:20,765 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,SelfDestructingSolverStorable17 [2024-10-12 14:50:20,766 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:20,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 587830627, now seen corresponding path program 16 times [2024-10-12 14:50:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172231649] [2024-10-12 14:50:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:50:20,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172231649] [2024-10-12 14:50:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172231649] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688526480] [2024-10-12 14:50:20,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:50:20,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:20,969 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) [2024-10-12 14:50:20,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 14:50:21,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:50:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:21,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 14:50:21,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:50:21,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-10-12 14:50:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688526480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:21,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:21,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-10-12 14:50:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562978015] [2024-10-12 14:50:21,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:21,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-12 14:50:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-12 14:50:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2024-10-12 14:50:21,383 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:21,662 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2024-10-12 14:50:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 14:50:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-12 14:50:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:21,663 INFO L225 Difference]: With dead ends: 131 [2024-10-12 14:50:21,664 INFO L226 Difference]: Without dead ends: 70 [2024-10-12 14:50:21,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:50:21,665 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:21,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:50:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-12 14:50:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-10-12 14:50:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2024-10-12 14:50:21,678 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 45 [2024-10-12 14:50:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:21,678 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2024-10-12 14:50:21,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2024-10-12 14:50:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-12 14:50:21,679 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:21,679 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:21,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-12 14:50:21,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:21,880 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:21,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash 56478906, now seen corresponding path program 17 times [2024-10-12 14:50:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:21,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380845745] [2024-10-12 14:50:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 14:50:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380845745] [2024-10-12 14:50:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380845745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902654581] [2024-10-12 14:50:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:50:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:22,099 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) [2024-10-12 14:50:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 14:50:22,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-12 14:50:22,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:22,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 14:50:22,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 14:50:22,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 14:50:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902654581] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:22,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:22,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-12 14:50:22,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217958242] [2024-10-12 14:50:22,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:22,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 14:50:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 14:50:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2024-10-12 14:50:22,465 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:22,567 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-10-12 14:50:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 14:50:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-12 14:50:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:22,568 INFO L225 Difference]: With dead ends: 70 [2024-10-12 14:50:22,568 INFO L226 Difference]: Without dead ends: 50 [2024-10-12 14:50:22,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2024-10-12 14:50:22,569 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:22,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-12 14:50:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-12 14:50:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-10-12 14:50:22,580 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2024-10-12 14:50:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:22,580 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-10-12 14:50:22,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-10-12 14:50:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 14:50:22,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:22,580 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:22,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-12 14:50:22,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:22,781 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:22,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:22,782 INFO L85 PathProgramCache]: Analyzing trace with hash -963863541, now seen corresponding path program 18 times [2024-10-12 14:50:22,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:22,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225151999] [2024-10-12 14:50:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:22,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:26,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225151999] [2024-10-12 14:50:26,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225151999] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:26,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019839829] [2024-10-12 14:50:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:50:26,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:26,849 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) [2024-10-12 14:50:26,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 14:50:26,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-12 14:50:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:26,949 WARN L253 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-10-12 14:50:26,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:26,979 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 19 treesize of output 1 [2024-10-12 14:50:27,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:27,938 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 19 treesize of output 16 [2024-10-12 14:50:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 2 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:50:28,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 14:50:29,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019839829] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:29,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:29,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 29, 22] total 77 [2024-10-12 14:50:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897508372] [2024-10-12 14:50:29,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:29,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-12 14:50:29,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-12 14:50:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=5504, Unknown=0, NotChecked=0, Total=5852 [2024-10-12 14:50:29,382 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 77 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:31,795 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2024-10-12 14:50:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-12 14:50:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 77 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-12 14:50:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:31,796 INFO L225 Difference]: With dead ends: 82 [2024-10-12 14:50:31,796 INFO L226 Difference]: Without dead ends: 78 [2024-10-12 14:50:31,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=702, Invalid=9804, Unknown=0, NotChecked=0, Total=10506 [2024-10-12 14:50:31,798 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:31,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 162 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-12 14:50:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-12 14:50:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2024-10-12 14:50:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2024-10-12 14:50:31,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 49 [2024-10-12 14:50:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:31,815 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2024-10-12 14:50:31,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6233766233766234) internal successors, (125), 77 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2024-10-12 14:50:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 14:50:31,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:31,816 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:31,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-12 14:50:32,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:32,017 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:32,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash -156222997, now seen corresponding path program 19 times [2024-10-12 14:50:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:32,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333426213] [2024-10-12 14:50:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:32,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 14:50:32,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:32,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333426213] [2024-10-12 14:50:32,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333426213] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:32,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088790811] [2024-10-12 14:50:32,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:50:32,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:32,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:32,268 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) [2024-10-12 14:50:32,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-12 14:50:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:32,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 14:50:32,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 14:50:32,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-12 14:50:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088790811] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:32,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-12 14:50:32,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275801699] [2024-10-12 14:50:32,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:32,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:50:32,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:50:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:50:32,707 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:32,953 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2024-10-12 14:50:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 14:50:32,956 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-12 14:50:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:32,957 INFO L225 Difference]: With dead ends: 140 [2024-10-12 14:50:32,957 INFO L226 Difference]: Without dead ends: 72 [2024-10-12 14:50:32,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:50:32,958 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:32,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:50:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-12 14:50:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-12 14:50:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2024-10-12 14:50:32,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2024-10-12 14:50:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:32,978 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2024-10-12 14:50:32,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2024-10-12 14:50:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-12 14:50:32,979 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:32,979 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:32,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-12 14:50:33,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:33,184 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:33,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash -804683615, now seen corresponding path program 20 times [2024-10-12 14:50:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:33,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816465807] [2024-10-12 14:50:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 14:50:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816465807] [2024-10-12 14:50:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816465807] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344280726] [2024-10-12 14:50:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:50:33,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:33,464 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) [2024-10-12 14:50:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-12 14:50:33,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:50:33,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:33,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 14:50:33,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 14:50:33,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 14:50:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344280726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:33,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-12 14:50:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196846374] [2024-10-12 14:50:33,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:33,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:50:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:50:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:50:33,880 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:33,994 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2024-10-12 14:50:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 14:50:33,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-12 14:50:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:33,995 INFO L225 Difference]: With dead ends: 98 [2024-10-12 14:50:33,995 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 14:50:33,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:50:33,996 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:33,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 14:50:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-12 14:50:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-10-12 14:50:34,012 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 51 [2024-10-12 14:50:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:34,012 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-10-12 14:50:34,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-10-12 14:50:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 14:50:34,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:34,013 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:34,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-12 14:50:34,217 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,SelfDestructingSolverStorable22 [2024-10-12 14:50:34,218 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:34,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash 638347537, now seen corresponding path program 21 times [2024-10-12 14:50:34,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:34,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820400881] [2024-10-12 14:50:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:34,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820400881] [2024-10-12 14:50:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820400881] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788491197] [2024-10-12 14:50:38,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:50:38,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:38,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:38,638 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) [2024-10-12 14:50:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-12 14:50:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 14:50:38,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:38,756 WARN L253 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-10-12 14:50:38,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:38,965 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 19 treesize of output 1 [2024-10-12 14:50:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:50:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:50:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:50:41,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:41,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2024-10-12 14:50:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:42,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:46,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788491197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:46,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:46,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53, 52] total 144 [2024-10-12 14:50:46,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478576948] [2024-10-12 14:50:46,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:46,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-10-12 14:50:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:46,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-10-12 14:50:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=19108, Unknown=0, NotChecked=0, Total=20592 [2024-10-12 14:50:46,884 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 144 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:55,333 INFO L93 Difference]: Finished difference Result 211 states and 235 transitions. [2024-10-12 14:50:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-10-12 14:50:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-12 14:50:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:55,335 INFO L225 Difference]: With dead ends: 211 [2024-10-12 14:50:55,335 INFO L226 Difference]: Without dead ends: 172 [2024-10-12 14:50:55,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12031 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=3360, Invalid=42222, Unknown=0, NotChecked=0, Total=45582 [2024-10-12 14:50:55,339 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:55,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 175 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-10-12 14:50:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-12 14:50:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 123. [2024-10-12 14:50:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2024-10-12 14:50:55,391 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 54 [2024-10-12 14:50:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:55,391 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2024-10-12 14:50:55,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2024-10-12 14:50:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-12 14:50:55,393 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:55,393 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:55,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-12 14:50:55,593 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,SelfDestructingSolverStorable23 [2024-10-12 14:50:55,593 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:55,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1299914913, now seen corresponding path program 22 times [2024-10-12 14:50:55,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:55,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854898390] [2024-10-12 14:50:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:55,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-12 14:50:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854898390] [2024-10-12 14:50:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854898390] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848597920] [2024-10-12 14:50:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:50:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:55,854 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) [2024-10-12 14:50:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-12 14:50:55,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:50:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:55,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-12 14:50:55,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-12 14:50:56,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-12 14:50:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848597920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:56,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2024-10-12 14:50:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22350967] [2024-10-12 14:50:56,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:56,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-12 14:50:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-12 14:50:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2024-10-12 14:50:56,556 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:57,145 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2024-10-12 14:50:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-12 14:50:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-10-12 14:50:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:57,146 INFO L225 Difference]: With dead ends: 172 [2024-10-12 14:50:57,146 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 14:50:57,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=3786, Unknown=0, NotChecked=0, Total=4422 [2024-10-12 14:50:57,147 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:57,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 75 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:50:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 14:50:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2024-10-12 14:50:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-10-12 14:50:57,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 56 [2024-10-12 14:50:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:57,173 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-10-12 14:50:57,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-10-12 14:50:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-12 14:50:57,174 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:57,174 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:57,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-12 14:50:57,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:57,375 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:57,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash -864396789, now seen corresponding path program 23 times [2024-10-12 14:50:57,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:57,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748935465] [2024-10-12 14:50:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:57,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat