/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:31:03,714 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:31:03,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:31:03,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:31:03,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:31:03,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:31:03,769 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:31:03,770 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:31:03,770 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:31:03,770 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:31:03,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:31:03,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:31:03,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:31:03,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:31:03,771 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:31:03,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:31:03,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:31:03,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:31:03,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:31:03,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:31:03,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:31:03,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:31:03,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:31:03,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:31:03,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:31:03,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:31:03,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:31:03,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:31:03,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:31:03,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:31:03,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:31:03,790 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:31:03,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:31:03,791 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:31:03,791 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:31:03,791 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:31:03,791 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:31:03,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:31:03,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:31:03,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:31:03,792 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:31:03,792 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:31:03,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:31:03,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:31:03,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:31:03,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:31:03,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:31:03,978 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:31:03,979 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:31:03,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr5.c [2023-12-18 18:31:05,076 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:31:05,207 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:31:05,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c [2023-12-18 18:31:05,212 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba9f3a8e/9a22ade360d3411ba4ca74a64cc1ad6d/FLAGc84696f1d [2023-12-18 18:31:05,221 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba9f3a8e/9a22ade360d3411ba4ca74a64cc1ad6d [2023-12-18 18:31:05,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:31:05,224 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:31:05,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:31:05,225 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:31:05,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:31:05,228 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62399c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05, skipping insertion in model container [2023-12-18 18:31:05,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,243 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:31:05,333 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c[395,408] [2023-12-18 18:31:05,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:31:05,356 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:31:05,364 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr5.c[395,408] [2023-12-18 18:31:05,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:31:05,380 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:31:05,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05 WrapperNode [2023-12-18 18:31:05,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:31:05,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:31:05,382 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:31:05,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:31:05,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,408 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 99 [2023-12-18 18:31:05,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:31:05,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:31:05,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:31:05,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:31:05,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,418 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,446 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 11, 7]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7]. The 10 writes are split as follows [0, 10, 0]. [2023-12-18 18:31:05,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,455 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:31:05,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:31:05,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:31:05,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:31:05,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (1/1) ... [2023-12-18 18:31:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:31:05,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:05,497 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) [2023-12-18 18:31:05,532 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 [2023-12-18 18:31:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:31:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:31:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:31:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:31:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:31:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:31:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:31:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 18:31:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-12-18 18:31:05,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-12-18 18:31:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:31:05,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:31:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:31:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:31:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:31:05,626 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:31:05,627 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:31:05,794 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:31:05,813 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:31:05,813 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 18:31:05,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:31:05 BoogieIcfgContainer [2023-12-18 18:31:05,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:31:05,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:31:05,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:31:05,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:31:05,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:31:05" (1/3) ... [2023-12-18 18:31:05,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7493d716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:31:05, skipping insertion in model container [2023-12-18 18:31:05,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:31:05" (2/3) ... [2023-12-18 18:31:05,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7493d716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:31:05, skipping insertion in model container [2023-12-18 18:31:05,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:31:05" (3/3) ... [2023-12-18 18:31:05,820 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2023-12-18 18:31:05,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:31:05,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:31:05,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:31:05,886 INFO L357 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, mHoare=true, 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;@5ca680e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:31:05,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:31:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 18:31:05,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:05,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:05,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:05,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -632587754, now seen corresponding path program 1 times [2023-12-18 18:31:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386175890] [2023-12-18 18:31:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:31:06,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:06,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386175890] [2023-12-18 18:31:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386175890] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:31:06,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:31:06,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:31:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558621626] [2023-12-18 18:31:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:31:06,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:31:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:31:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:31:06,097 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-12-18 18:31:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:06,151 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2023-12-18 18:31:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:31:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-12-18 18:31:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:06,157 INFO L225 Difference]: With dead ends: 64 [2023-12-18 18:31:06,157 INFO L226 Difference]: Without dead ends: 30 [2023-12-18 18:31:06,160 INFO L412 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 [2023-12-18 18:31:06,164 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:06,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:31:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-18 18:31:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-18 18:31:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-12-18 18:31:06,199 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 10 [2023-12-18 18:31:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:06,199 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-12-18 18:31:06,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-12-18 18:31:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-12-18 18:31:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 18:31:06,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:06,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:06,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:31:06,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:06,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash -674146199, now seen corresponding path program 1 times [2023-12-18 18:31:06,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:06,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958516922] [2023-12-18 18:31:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:31:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958516922] [2023-12-18 18:31:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958516922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:31:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:31:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 18:31:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730624689] [2023-12-18 18:31:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:31:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 18:31:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 18:31:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:31:06,548 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-12-18 18:31:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:06,659 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-12-18 18:31:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:31:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2023-12-18 18:31:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:06,661 INFO L225 Difference]: With dead ends: 53 [2023-12-18 18:31:06,661 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 18:31:06,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:31:06,663 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:06,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:31:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 18:31:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2023-12-18 18:31:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-12-18 18:31:06,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 10 [2023-12-18 18:31:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:06,681 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-12-18 18:31:06,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-12-18 18:31:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-12-18 18:31:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:31:06,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:06,682 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:06,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:31:06,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:06,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1671321384, now seen corresponding path program 1 times [2023-12-18 18:31:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:06,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654332408] [2023-12-18 18:31:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:07,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:07,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654332408] [2023-12-18 18:31:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654332408] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:07,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823192951] [2023-12-18 18:31:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:07,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:07,209 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) [2023-12-18 18:31:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:31:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:07,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 18:31:07,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:07,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:31:07,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:07,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:07,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:07,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:07,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:07,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-18 18:31:07,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 18:31:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823192951] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:07,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 15 [2023-12-18 18:31:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446732916] [2023-12-18 18:31:07,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 18:31:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 18:31:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-12-18 18:31:07,700 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 18:31:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:08,073 INFO L93 Difference]: Finished difference Result 113 states and 164 transitions. [2023-12-18 18:31:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 18:31:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2023-12-18 18:31:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:08,075 INFO L225 Difference]: With dead ends: 113 [2023-12-18 18:31:08,075 INFO L226 Difference]: Without dead ends: 111 [2023-12-18 18:31:08,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:31:08,076 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:08,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 304 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:31:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-18 18:31:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2023-12-18 18:31:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 18:31:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2023-12-18 18:31:08,087 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 37 [2023-12-18 18:31:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:08,088 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2023-12-18 18:31:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 18:31:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2023-12-18 18:31:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:31:08,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:08,089 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:08,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:08,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:08,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:08,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash -700417878, now seen corresponding path program 1 times [2023-12-18 18:31:08,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:08,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141997710] [2023-12-18 18:31:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:08,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141997710] [2023-12-18 18:31:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141997710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:08,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714946322] [2023-12-18 18:31:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:08,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:08,609 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) [2023-12-18 18:31:08,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:31:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:08,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 18:31:08,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:08,760 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 [2023-12-18 18:31:08,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:08,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:08,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:08,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:09,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:09,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:09,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-18 18:31:09,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-18 18:31:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714946322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:09,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-12-18 18:31:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930201596] [2023-12-18 18:31:09,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 18:31:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 18:31:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-12-18 18:31:09,315 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:09,995 INFO L93 Difference]: Finished difference Result 138 states and 200 transitions. [2023-12-18 18:31:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 18:31:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 37 [2023-12-18 18:31:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:09,998 INFO L225 Difference]: With dead ends: 138 [2023-12-18 18:31:09,998 INFO L226 Difference]: Without dead ends: 136 [2023-12-18 18:31:09,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:31:09,999 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 387 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:10,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 221 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 18:31:10,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-18 18:31:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 33. [2023-12-18 18:31:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-18 18:31:10,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 37 [2023-12-18 18:31:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:10,010 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-18 18:31:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-18 18:31:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:31:10,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:10,011 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:10,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 18:31:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 18:31:10,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:10,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1214920911, now seen corresponding path program 1 times [2023-12-18 18:31:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:10,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904185524] [2023-12-18 18:31:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:10,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:10,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904185524] [2023-12-18 18:31:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904185524] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261673796] [2023-12-18 18:31:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:10,491 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) [2023-12-18 18:31:10,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:31:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:10,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 18:31:10,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:10,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:31:10,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:10,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:31:10,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-18 18:31:10,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:31:10,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-18 18:31:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:10,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:10,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:10,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:31:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261673796] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:10,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 17 [2023-12-18 18:31:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566354839] [2023-12-18 18:31:10,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:31:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:31:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:31:10,846 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-18 18:31:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:11,360 INFO L93 Difference]: Finished difference Result 179 states and 263 transitions. [2023-12-18 18:31:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 18:31:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2023-12-18 18:31:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:11,361 INFO L225 Difference]: With dead ends: 179 [2023-12-18 18:31:11,362 INFO L226 Difference]: Without dead ends: 177 [2023-12-18 18:31:11,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:31:11,362 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 138 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:11,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 305 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 18:31:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-18 18:31:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2023-12-18 18:31:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-18 18:31:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2023-12-18 18:31:11,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 40 [2023-12-18 18:31:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:11,377 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2023-12-18 18:31:11,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 5 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-18 18:31:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2023-12-18 18:31:11,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:31:11,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:11,378 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:11,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:11,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:11,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1074372301, now seen corresponding path program 1 times [2023-12-18 18:31:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118027583] [2023-12-18 18:31:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:11,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:11,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118027583] [2023-12-18 18:31:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118027583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935898419] [2023-12-18 18:31:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:11,848 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) [2023-12-18 18:31:11,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:31:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:11,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 18:31:11,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:12,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:31:12,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:12,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:12,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:12,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:31:12,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:12,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:12,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:31:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:12,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935898419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:12,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:12,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2023-12-18 18:31:12,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714666152] [2023-12-18 18:31:12,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 18:31:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 18:31:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-12-18 18:31:12,455 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:13,097 INFO L93 Difference]: Finished difference Result 195 states and 284 transitions. [2023-12-18 18:31:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 18:31:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 40 [2023-12-18 18:31:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:13,099 INFO L225 Difference]: With dead ends: 195 [2023-12-18 18:31:13,099 INFO L226 Difference]: Without dead ends: 193 [2023-12-18 18:31:13,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 18:31:13,100 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 297 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:13,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 277 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 18:31:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-18 18:31:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 82. [2023-12-18 18:31:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-18 18:31:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2023-12-18 18:31:13,114 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 40 [2023-12-18 18:31:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:13,115 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2023-12-18 18:31:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2023-12-18 18:31:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 18:31:13,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:13,116 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:13,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:13,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:13,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1819303670, now seen corresponding path program 1 times [2023-12-18 18:31:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562687901] [2023-12-18 18:31:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:13,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:13,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562687901] [2023-12-18 18:31:13,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562687901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:13,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559300373] [2023-12-18 18:31:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:13,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:13,624 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) [2023-12-18 18:31:13,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:31:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:13,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 18:31:13,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:13,787 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 [2023-12-18 18:31:13,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:13,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:13,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:31:13,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:14,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:14,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:31:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:14,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559300373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:14,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:14,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2023-12-18 18:31:14,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399100871] [2023-12-18 18:31:14,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 18:31:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 18:31:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:31:14,176 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:15,518 INFO L93 Difference]: Finished difference Result 459 states and 706 transitions. [2023-12-18 18:31:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 18:31:15,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2023-12-18 18:31:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:15,521 INFO L225 Difference]: With dead ends: 459 [2023-12-18 18:31:15,521 INFO L226 Difference]: Without dead ends: 457 [2023-12-18 18:31:15,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 18:31:15,523 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 892 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:15,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 343 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 18:31:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-12-18 18:31:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 39. [2023-12-18 18:31:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-12-18 18:31:15,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 43 [2023-12-18 18:31:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-12-18 18:31:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-12-18 18:31:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 18:31:15,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:15,538 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:15,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:15,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:15,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -739773487, now seen corresponding path program 2 times [2023-12-18 18:31:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:15,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800930492] [2023-12-18 18:31:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800930492] [2023-12-18 18:31:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800930492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991256031] [2023-12-18 18:31:15,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:31:15,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:15,973 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) [2023-12-18 18:31:15,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:31:16,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:31:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:16,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 18:31:16,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:16,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:31:16,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:16,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:16,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:16,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:31:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:16,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991256031] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:16,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2023-12-18 18:31:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373807603] [2023-12-18 18:31:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:31:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:31:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:31:16,219 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 18:31:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:17,979 INFO L93 Difference]: Finished difference Result 475 states and 727 transitions. [2023-12-18 18:31:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-18 18:31:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 46 [2023-12-18 18:31:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:17,982 INFO L225 Difference]: With dead ends: 475 [2023-12-18 18:31:17,982 INFO L226 Difference]: Without dead ends: 473 [2023-12-18 18:31:17,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=592, Invalid=2830, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 18:31:17,983 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 214 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:17,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 981 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-18 18:31:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-12-18 18:31:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 106. [2023-12-18 18:31:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.3625) internal successors, (109), 80 states have internal predecessors, (109), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-18 18:31:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 157 transitions. [2023-12-18 18:31:18,011 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 157 transitions. Word has length 46 [2023-12-18 18:31:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:18,011 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 157 transitions. [2023-12-18 18:31:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-18 18:31:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 157 transitions. [2023-12-18 18:31:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 18:31:18,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:18,012 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:18,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:18,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -317071661, now seen corresponding path program 1 times [2023-12-18 18:31:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:18,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020589769] [2023-12-18 18:31:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020589769] [2023-12-18 18:31:18,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020589769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16996455] [2023-12-18 18:31:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:18,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:18,498 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) [2023-12-18 18:31:18,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:31:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:18,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 18:31:18,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:18,676 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 [2023-12-18 18:31:18,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:18,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:31:18,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:18,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:18,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:31:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16996455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:19,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 28 [2023-12-18 18:31:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087780304] [2023-12-18 18:31:19,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:19,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-18 18:31:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-18 18:31:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-12-18 18:31:19,084 INFO L87 Difference]: Start difference. First operand 106 states and 157 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:22,361 INFO L93 Difference]: Finished difference Result 765 states and 1178 transitions. [2023-12-18 18:31:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-18 18:31:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 46 [2023-12-18 18:31:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:22,367 INFO L225 Difference]: With dead ends: 765 [2023-12-18 18:31:22,367 INFO L226 Difference]: Without dead ends: 763 [2023-12-18 18:31:22,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1853, Invalid=9919, Unknown=0, NotChecked=0, Total=11772 [2023-12-18 18:31:22,371 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 1516 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 1343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1343 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:22,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 843 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1343 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-18 18:31:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-12-18 18:31:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 42. [2023-12-18 18:31:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-12-18 18:31:22,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 46 [2023-12-18 18:31:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:22,393 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-12-18 18:31:22,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-18 18:31:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-12-18 18:31:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 18:31:22,394 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:22,394 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:22,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 18:31:22,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:22,601 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:22,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1109164568, now seen corresponding path program 3 times [2023-12-18 18:31:22,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:22,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390221801] [2023-12-18 18:31:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:22,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390221801] [2023-12-18 18:31:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390221801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245368918] [2023-12-18 18:31:22,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:31:22,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:22,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:22,863 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) [2023-12-18 18:31:22,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:31:22,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 18:31:22,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:22,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 18:31:22,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:22,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 18:31:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:23,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:23,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-18 18:31:23,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-18 18:31:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:23,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245368918] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:23,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-12-18 18:31:23,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872974355] [2023-12-18 18:31:23,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:23,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 18:31:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 18:31:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-12-18 18:31:23,238 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-18 18:31:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:27,561 INFO L93 Difference]: Finished difference Result 1014 states and 1525 transitions. [2023-12-18 18:31:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-12-18 18:31:27,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 49 [2023-12-18 18:31:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:27,565 INFO L225 Difference]: With dead ends: 1014 [2023-12-18 18:31:27,565 INFO L226 Difference]: Without dead ends: 1012 [2023-12-18 18:31:27,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6040 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1892, Invalid=14110, Unknown=0, NotChecked=0, Total=16002 [2023-12-18 18:31:27,569 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 419 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 5728 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 6468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 5728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:27,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 2248 Invalid, 6468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 5728 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-18 18:31:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-12-18 18:31:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 129. [2023-12-18 18:31:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 97 states have internal predecessors, (133), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-18 18:31:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 193 transitions. [2023-12-18 18:31:27,668 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 193 transitions. Word has length 49 [2023-12-18 18:31:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:27,668 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 193 transitions. [2023-12-18 18:31:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-18 18:31:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 193 transitions. [2023-12-18 18:31:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 18:31:27,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:27,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:27,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:27,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 18:31:27,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:27,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1496858986, now seen corresponding path program 1 times [2023-12-18 18:31:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:27,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679791334] [2023-12-18 18:31:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:27,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:28,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679791334] [2023-12-18 18:31:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679791334] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92106904] [2023-12-18 18:31:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:28,123 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) [2023-12-18 18:31:28,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:31:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:28,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 18:31:28,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:28,339 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 [2023-12-18 18:31:28,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:28,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:28,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:28,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:31:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:28,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92106904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:28,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:28,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-12-18 18:31:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652681463] [2023-12-18 18:31:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:31:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:31:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:31:28,805 INFO L87 Difference]: Start difference. First operand 129 states and 193 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-18 18:31:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:34,349 INFO L93 Difference]: Finished difference Result 914 states and 1386 transitions. [2023-12-18 18:31:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-12-18 18:31:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 49 [2023-12-18 18:31:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:34,352 INFO L225 Difference]: With dead ends: 914 [2023-12-18 18:31:34,352 INFO L226 Difference]: Without dead ends: 912 [2023-12-18 18:31:34,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10830 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4125, Invalid=24945, Unknown=0, NotChecked=0, Total=29070 [2023-12-18 18:31:34,357 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 779 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 4421 mSolverCounterSat, 1121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 5542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1121 IncrementalHoareTripleChecker+Valid, 4421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:34,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 1735 Invalid, 5542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1121 Valid, 4421 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-18 18:31:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-12-18 18:31:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 45. [2023-12-18 18:31:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 18:31:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-12-18 18:31:34,387 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 49 [2023-12-18 18:31:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:34,388 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-12-18 18:31:34,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-18 18:31:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-12-18 18:31:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-18 18:31:34,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:34,388 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:34,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-18 18:31:34,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:34,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:34,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1932646287, now seen corresponding path program 4 times [2023-12-18 18:31:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:34,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168959843] [2023-12-18 18:31:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168959843] [2023-12-18 18:31:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168959843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439135640] [2023-12-18 18:31:34,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:31:34,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:34,845 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) [2023-12-18 18:31:34,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:31:34,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:31:34,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:34,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 18:31:34,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:35,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-18 18:31:35,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439135640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:35,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2023-12-18 18:31:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709333312] [2023-12-18 18:31:35,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:35,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-18 18:31:35,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-18 18:31:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2023-12-18 18:31:35,298 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-18 18:31:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:35,611 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2023-12-18 18:31:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 18:31:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2023-12-18 18:31:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:35,612 INFO L225 Difference]: With dead ends: 100 [2023-12-18 18:31:35,612 INFO L226 Difference]: Without dead ends: 78 [2023-12-18 18:31:35,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:31:35,616 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:35,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 100 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:31:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-18 18:31:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2023-12-18 18:31:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 18:31:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2023-12-18 18:31:35,648 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 52 [2023-12-18 18:31:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:35,648 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2023-12-18 18:31:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-18 18:31:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2023-12-18 18:31:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:31:35,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:35,649 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:35,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:31:35,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 18:31:35,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:35,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1857075088, now seen corresponding path program 5 times [2023-12-18 18:31:35,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:35,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713838260] [2023-12-18 18:31:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:35,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:31:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:31:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:31:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:31:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:31:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:31:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713838260] [2023-12-18 18:31:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713838260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541174321] [2023-12-18 18:31:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:31:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:36,270 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) [2023-12-18 18:31:36,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:31:36,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 18:31:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:31:36,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-18 18:31:36,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:36,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:31:36,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:31:36,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:31:36,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-18 18:31:36,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:31:36,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-18 18:31:36,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:31:36,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-12-18 18:31:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:31:36,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:37,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:37,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:31:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:31:37,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541174321] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:37,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:37,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 29 [2023-12-18 18:31:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697776383] [2023-12-18 18:31:37,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 18:31:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 18:31:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:31:37,046 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-12-18 18:31:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:31:45,402 INFO L93 Difference]: Finished difference Result 2151 states and 3307 transitions. [2023-12-18 18:31:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2023-12-18 18:31:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-12-18 18:31:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:31:45,409 INFO L225 Difference]: With dead ends: 2151 [2023-12-18 18:31:45,409 INFO L226 Difference]: Without dead ends: 2149 [2023-12-18 18:31:45,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33670 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7037, Invalid=67765, Unknown=0, NotChecked=0, Total=74802 [2023-12-18 18:31:45,415 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1001 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 4955 mSolverCounterSat, 1477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 4955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:31:45,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1748 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1477 Valid, 4955 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-18 18:31:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2023-12-18 18:31:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 161. [2023-12-18 18:31:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 122 states have (on average 1.360655737704918) internal successors, (166), 122 states have internal predecessors, (166), 37 states have call successors, (37), 1 states have call predecessors, (37), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-18 18:31:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 240 transitions. [2023-12-18 18:31:45,550 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 240 transitions. Word has length 79 [2023-12-18 18:31:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:31:45,550 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 240 transitions. [2023-12-18 18:31:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 8 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-12-18 18:31:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 240 transitions. [2023-12-18 18:31:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-18 18:31:45,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:31:45,551 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:31:45,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 18:31:45,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 18:31:45,756 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:31:45,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:31:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1608928594, now seen corresponding path program 1 times [2023-12-18 18:31:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:31:45,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178801475] [2023-12-18 18:31:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:31:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:31:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:31:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:31:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:31:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:31:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:31:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:31:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:31:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:31:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:31:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:31:46,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:31:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178801475] [2023-12-18 18:31:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178801475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:31:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614103205] [2023-12-18 18:31:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:31:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:31:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:31:46,175 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) [2023-12-18 18:31:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:31:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:31:46,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 18:31:46,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:31:46,431 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 [2023-12-18 18:31:46,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:46,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:46,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:46,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:31:46,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:31:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 48 proven. 59 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-18 18:31:46,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:31:47,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:31:47,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:31:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:31:47,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614103205] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:31:47,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:31:47,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 38 [2023-12-18 18:31:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745544732] [2023-12-18 18:31:47,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:31:47,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 18:31:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:31:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 18:31:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 18:31:47,184 INFO L87 Difference]: Start difference. First operand 161 states and 240 transitions. Second operand has 38 states, 38 states have (on average 3.789473684210526) internal successors, (144), 38 states have internal predecessors, (144), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:32:00,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:32:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:32:03,971 INFO L93 Difference]: Finished difference Result 2637 states and 4118 transitions. [2023-12-18 18:32:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2023-12-18 18:32:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.789473684210526) internal successors, (144), 38 states have internal predecessors, (144), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 79 [2023-12-18 18:32:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:32:04,014 INFO L225 Difference]: With dead ends: 2637 [2023-12-18 18:32:04,014 INFO L226 Difference]: Without dead ends: 2635 [2023-12-18 18:32:04,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 148 SyntacticMatches, 11 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40081 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10342, Invalid=84214, Unknown=0, NotChecked=0, Total=94556 [2023-12-18 18:32:04,020 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 3897 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 6683 mSolverCounterSat, 4515 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 11199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4515 IncrementalHoareTripleChecker+Valid, 6683 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:32:04,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3897 Valid, 2244 Invalid, 11199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4515 Valid, 6683 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2023-12-18 18:32:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-12-18 18:32:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 213. [2023-12-18 18:32:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 158 states have (on average 1.3924050632911393) internal successors, (220), 158 states have internal predecessors, (220), 52 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-12-18 18:32:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 324 transitions. [2023-12-18 18:32:04,251 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 324 transitions. Word has length 79 [2023-12-18 18:32:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:32:04,251 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 324 transitions. [2023-12-18 18:32:04,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.789473684210526) internal successors, (144), 38 states have internal predecessors, (144), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:32:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 324 transitions. [2023-12-18 18:32:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 18:32:04,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:32:04,252 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:32:04,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-18 18:32:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 18:32:04,457 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:32:04,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:32:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2016423257, now seen corresponding path program 1 times [2023-12-18 18:32:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:32:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393025858] [2023-12-18 18:32:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:32:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:32:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:32:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:32:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:32:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:32:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:32:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:32:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:32:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:32:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:32:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:32:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:32:04,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:32:04,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393025858] [2023-12-18 18:32:04,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393025858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:32:04,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745762514] [2023-12-18 18:32:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:32:04,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:32:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:32:04,829 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) [2023-12-18 18:32:04,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:32:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:04,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 18:32:04,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:32:05,059 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 [2023-12-18 18:32:05,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:32:05,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:32:05,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:32:05,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:32:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 76 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-18 18:32:05,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:32:05,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:32:05,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:32:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:32:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745762514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:32:05,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:32:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 41 [2023-12-18 18:32:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491482105] [2023-12-18 18:32:05,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:32:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 18:32:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:32:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 18:32:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:32:05,867 INFO L87 Difference]: Start difference. First operand 213 states and 324 transitions. Second operand has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:32:16,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:32:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:32:36,303 INFO L93 Difference]: Finished difference Result 4629 states and 7241 transitions. [2023-12-18 18:32:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 515 states. [2023-12-18 18:32:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 82 [2023-12-18 18:32:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:32:36,327 INFO L225 Difference]: With dead ends: 4629 [2023-12-18 18:32:36,327 INFO L226 Difference]: Without dead ends: 4627 [2023-12-18 18:32:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 154 SyntacticMatches, 8 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140497 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=26364, Invalid=278892, Unknown=0, NotChecked=0, Total=305256 [2023-12-18 18:32:36,349 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 5413 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 9304 mSolverCounterSat, 7037 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5413 SdHoareTripleChecker+Valid, 3339 SdHoareTripleChecker+Invalid, 16342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7037 IncrementalHoareTripleChecker+Valid, 9304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:32:36,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5413 Valid, 3339 Invalid, 16342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7037 Valid, 9304 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2023-12-18 18:32:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2023-12-18 18:32:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 318. [2023-12-18 18:32:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 231 states have (on average 1.4242424242424243) internal successors, (329), 231 states have internal predecessors, (329), 82 states have call successors, (82), 4 states have call predecessors, (82), 4 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-18 18:32:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 493 transitions. [2023-12-18 18:32:36,737 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 493 transitions. Word has length 82 [2023-12-18 18:32:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:32:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 493 transitions. [2023-12-18 18:32:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:32:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 493 transitions. [2023-12-18 18:32:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-18 18:32:36,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:32:36,739 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:32:36,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 18:32:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 18:32:36,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:32:36,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:32:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -949663280, now seen corresponding path program 6 times [2023-12-18 18:32:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:32:36,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901837729] [2023-12-18 18:32:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:32:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:32:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:32:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:32:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:32:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:32:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:32:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:32:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:32:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:32:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:32:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:32:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:32:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:32:37,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:32:37,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901837729] [2023-12-18 18:32:37,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901837729] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:32:37,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368828441] [2023-12-18 18:32:37,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:32:37,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:32:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:32:37,313 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) [2023-12-18 18:32:37,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:32:37,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 18:32:37,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:32:37,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-18 18:32:37,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:32:37,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:32:37,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:32:37,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:32:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:32:37,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:32:37,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:32:37,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:32:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:32:37,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368828441] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:32:37,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:32:37,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 31 [2023-12-18 18:32:37,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219783196] [2023-12-18 18:32:37,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:32:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:32:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:32:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:32:37,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:32:37,961 INFO L87 Difference]: Start difference. First operand 318 states and 493 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 18:33:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:33:21,999 INFO L93 Difference]: Finished difference Result 9923 states and 15777 transitions. [2023-12-18 18:33:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 745 states. [2023-12-18 18:33:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 85 [2023-12-18 18:33:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:33:22,045 INFO L225 Difference]: With dead ends: 9923 [2023-12-18 18:33:22,046 INFO L226 Difference]: Without dead ends: 9921 [2023-12-18 18:33:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 759 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272193 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=27955, Invalid=550405, Unknown=0, NotChecked=0, Total=578360 [2023-12-18 18:33:22,077 INFO L413 NwaCegarLoop]: 1484 mSDtfsCounter, 1201 mSDsluCounter, 10638 mSDsCounter, 0 mSdLazyCounter, 35784 mSolverCounterSat, 2403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 12122 SdHoareTripleChecker+Invalid, 38187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2403 IncrementalHoareTripleChecker+Valid, 35784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:33:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 12122 Invalid, 38187 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2403 Valid, 35784 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2023-12-18 18:33:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2023-12-18 18:33:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 733. [2023-12-18 18:33:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 525 states have (on average 1.4628571428571429) internal successors, (768), 525 states have internal predecessors, (768), 203 states have call successors, (203), 4 states have call predecessors, (203), 4 states have return successors, (203), 203 states have call predecessors, (203), 203 states have call successors, (203) [2023-12-18 18:33:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1174 transitions. [2023-12-18 18:33:23,134 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1174 transitions. Word has length 85 [2023-12-18 18:33:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:33:23,134 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1174 transitions. [2023-12-18 18:33:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-18 18:33:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1174 transitions. [2023-12-18 18:33:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-18 18:33:23,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:33:23,135 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:33:23,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 18:33:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:33:23,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:33:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:33:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1979022578, now seen corresponding path program 1 times [2023-12-18 18:33:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:33:23,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247313598] [2023-12-18 18:33:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:33:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:33:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:33:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:33:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:33:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:33:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:33:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:33:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:33:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:33:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:33:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:33:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:33:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:33:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247313598] [2023-12-18 18:33:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247313598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:33:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172499050] [2023-12-18 18:33:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:33:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:33:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:33:23,809 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) [2023-12-18 18:33:23,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 18:33:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:33:23,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 18:33:23,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:33:24,096 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 [2023-12-18 18:33:24,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:33:24,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:33:24,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:33:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 32 proven. 96 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-18 18:33:24,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:33:24,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:33:24,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:33:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:33:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172499050] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:33:24,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:33:24,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 44 [2023-12-18 18:33:24,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998329617] [2023-12-18 18:33:24,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:33:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 18:33:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:33:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 18:33:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 18:33:24,852 INFO L87 Difference]: Start difference. First operand 733 states and 1174 transitions. Second operand has 44 states, 44 states have (on average 3.6818181818181817) internal successors, (162), 44 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:34:16,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:34:20,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:34:24,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:34:34,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:34:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:34:57,036 INFO L93 Difference]: Finished difference Result 13523 states and 21438 transitions. [2023-12-18 18:34:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1138 states. [2023-12-18 18:34:57,036 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6818181818181817) internal successors, (162), 44 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 85 [2023-12-18 18:34:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:34:57,059 INFO L225 Difference]: With dead ends: 13523 [2023-12-18 18:34:57,059 INFO L226 Difference]: Without dead ends: 13521 [2023-12-18 18:34:57,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 1177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678408 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=86926, Invalid=1301936, Unknown=0, NotChecked=0, Total=1388862 [2023-12-18 18:34:57,143 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 12588 mSDsluCounter, 3757 mSDsCounter, 0 mSdLazyCounter, 15143 mSolverCounterSat, 17885 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12588 SdHoareTripleChecker+Valid, 4136 SdHoareTripleChecker+Invalid, 33032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17885 IncrementalHoareTripleChecker+Valid, 15143 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:34:57,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12588 Valid, 4136 Invalid, 33032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17885 Valid, 15143 Invalid, 4 Unknown, 0 Unchecked, 30.8s Time] [2023-12-18 18:34:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2023-12-18 18:34:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 740. [2023-12-18 18:34:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 528 states have (on average 1.4602272727272727) internal successors, (771), 528 states have internal predecessors, (771), 203 states have call successors, (203), 8 states have call predecessors, (203), 8 states have return successors, (203), 203 states have call predecessors, (203), 203 states have call successors, (203) [2023-12-18 18:34:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1177 transitions. [2023-12-18 18:34:58,406 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1177 transitions. Word has length 85 [2023-12-18 18:34:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:34:58,407 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1177 transitions. [2023-12-18 18:34:58,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6818181818181817) internal successors, (162), 44 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:34:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1177 transitions. [2023-12-18 18:34:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-18 18:34:58,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:34:58,408 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:34:58,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 18:34:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 18:34:58,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:34:58,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:34:58,610 INFO L85 PathProgramCache]: Analyzing trace with hash -463604855, now seen corresponding path program 7 times [2023-12-18 18:34:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:34:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211051723] [2023-12-18 18:34:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:34:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:34:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:34:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:34:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:34:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:34:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:34:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:34:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:34:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:34:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:34:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:34:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:34:59,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:34:59,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211051723] [2023-12-18 18:34:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211051723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:34:59,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821900049] [2023-12-18 18:34:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:34:59,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:34:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:34:59,043 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) [2023-12-18 18:34:59,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 18:34:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:34:59,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 18:34:59,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:34:59,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:34:59,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-18 18:34:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:34:59,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:34:59,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:34:59,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:34:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:34:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821900049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:34:59,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:34:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 31 [2023-12-18 18:34:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10919881] [2023-12-18 18:34:59,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:34:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-18 18:34:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:34:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-18 18:34:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:34:59,675 INFO L87 Difference]: Start difference. First operand 740 states and 1177 transitions. Second operand has 31 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-12-18 18:36:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:36:18,799 INFO L93 Difference]: Finished difference Result 17073 states and 27243 transitions. [2023-12-18 18:36:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1091 states. [2023-12-18 18:36:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 88 [2023-12-18 18:36:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:36:18,835 INFO L225 Difference]: With dead ends: 17073 [2023-12-18 18:36:18,835 INFO L226 Difference]: Without dead ends: 17071 [2023-12-18 18:36:19,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 1105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582202 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=44216, Invalid=1180126, Unknown=0, NotChecked=0, Total=1224342 [2023-12-18 18:36:19,054 INFO L413 NwaCegarLoop]: 2644 mSDtfsCounter, 962 mSDsluCounter, 20908 mSDsCounter, 0 mSdLazyCounter, 62850 mSolverCounterSat, 2107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 23552 SdHoareTripleChecker+Invalid, 64957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2107 IncrementalHoareTripleChecker+Valid, 62850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:36:19,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 23552 Invalid, 64957 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2107 Valid, 62850 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time] [2023-12-18 18:36:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2023-12-18 18:36:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 1699. [2023-12-18 18:36:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1206 states have (on average 1.4809286898839138) internal successors, (1786), 1206 states have internal predecessors, (1786), 484 states have call successors, (484), 8 states have call predecessors, (484), 8 states have return successors, (484), 484 states have call predecessors, (484), 484 states have call successors, (484) [2023-12-18 18:36:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2754 transitions. [2023-12-18 18:36:22,063 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2754 transitions. Word has length 88 [2023-12-18 18:36:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:36:22,063 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2754 transitions. [2023-12-18 18:36:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.967741935483871) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-12-18 18:36:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2754 transitions. [2023-12-18 18:36:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-18 18:36:22,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:36:22,066 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:36:22,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 18:36:22,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 18:36:22,271 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:36:22,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:36:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash -857971641, now seen corresponding path program 1 times [2023-12-18 18:36:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:36:22,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340315644] [2023-12-18 18:36:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:36:22,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:36:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:36:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:36:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:36:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:36:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:36:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:36:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:36:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:36:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:36:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:36:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:36:22,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:36:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340315644] [2023-12-18 18:36:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340315644] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:36:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216855046] [2023-12-18 18:36:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:36:22,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:36:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:36:22,614 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) [2023-12-18 18:36:22,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 18:36:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:36:22,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 18:36:22,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:36:22,947 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 [2023-12-18 18:36:23,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:36:23,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:36:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 119 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-18 18:36:23,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:36:23,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:36:23,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:36:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:36:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216855046] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:36:23,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:36:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 47 [2023-12-18 18:36:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072706021] [2023-12-18 18:36:23,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:36:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 18:36:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:36:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 18:36:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 18:36:23,839 INFO L87 Difference]: Start difference. First operand 1699 states and 2754 transitions. Second operand has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:37:08,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:37:39,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:37:43,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 18:39:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:39:11,980 INFO L93 Difference]: Finished difference Result 20514 states and 32488 transitions. [2023-12-18 18:39:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1889 states. [2023-12-18 18:39:11,981 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 88 [2023-12-18 18:39:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:39:12,032 INFO L225 Difference]: With dead ends: 20514 [2023-12-18 18:39:12,032 INFO L226 Difference]: Without dead ends: 20512 [2023-12-18 18:39:12,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2098 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 1931 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833984 ImplicationChecksByTransitivity, 87.7s TimeCoverageRelationStatistics Valid=162699, Invalid=3571857, Unknown=0, NotChecked=0, Total=3734556 [2023-12-18 18:39:12,342 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 11712 mSDsluCounter, 5778 mSDsCounter, 0 mSdLazyCounter, 20064 mSolverCounterSat, 22529 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11712 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 42596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 22529 IncrementalHoareTripleChecker+Valid, 20064 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:39:12,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11712 Valid, 6188 Invalid, 42596 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [22529 Valid, 20064 Invalid, 3 Unknown, 0 Unchecked, 33.4s Time] [2023-12-18 18:39:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20512 states. [2023-12-18 18:39:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20512 to 1714. [2023-12-18 18:39:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1213 states have (on average 1.4781533388293486) internal successors, (1793), 1213 states have internal predecessors, (1793), 484 states have call successors, (484), 16 states have call predecessors, (484), 16 states have return successors, (484), 484 states have call predecessors, (484), 484 states have call successors, (484) [2023-12-18 18:39:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2761 transitions. [2023-12-18 18:39:15,562 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2761 transitions. Word has length 88 [2023-12-18 18:39:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:39:15,563 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2761 transitions. [2023-12-18 18:39:15,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6382978723404253) internal successors, (171), 47 states have internal predecessors, (171), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-18 18:39:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2761 transitions. [2023-12-18 18:39:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-18 18:39:15,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:39:15,566 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:39:15,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-18 18:39:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:39:15,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:39:15,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:39:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1368179504, now seen corresponding path program 8 times [2023-12-18 18:39:15,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:39:15,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141386036] [2023-12-18 18:39:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:39:15,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:39:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:39:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:39:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:39:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:39:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:39:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:39:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:39:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:39:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:39:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:39:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:39:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:39:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:39:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141386036] [2023-12-18 18:39:16,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141386036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:39:16,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224461209] [2023-12-18 18:39:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:39:16,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:39:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:39:16,184 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) [2023-12-18 18:39:16,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 18:39:16,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:39:16,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:39:16,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-18 18:39:16,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:39:16,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 18:39:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:39:16,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:39:16,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:39:16,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 18:39:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:39:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224461209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:39:16,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:39:16,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 33 [2023-12-18 18:39:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370503337] [2023-12-18 18:39:16,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:39:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 18:39:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:39:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 18:39:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 18:39:16,921 INFO L87 Difference]: Start difference. First operand 1714 states and 2761 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 4 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-18 18:42:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:07,031 INFO L93 Difference]: Finished difference Result 31845 states and 50933 transitions. [2023-12-18 18:42:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1811 states. [2023-12-18 18:42:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 4 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 91 [2023-12-18 18:42:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:07,109 INFO L225 Difference]: With dead ends: 31845 [2023-12-18 18:42:07,110 INFO L226 Difference]: Without dead ends: 31843 [2023-12-18 18:42:07,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2012 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 1826 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602477 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=83507, Invalid=3256249, Unknown=0, NotChecked=0, Total=3339756 [2023-12-18 18:42:07,376 INFO L413 NwaCegarLoop]: 4589 mSDtfsCounter, 866 mSDsluCounter, 33428 mSDsCounter, 0 mSdLazyCounter, 114866 mSolverCounterSat, 2120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 38017 SdHoareTripleChecker+Invalid, 116986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 2120 IncrementalHoareTripleChecker+Valid, 114866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:07,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 38017 Invalid, 116986 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [2120 Valid, 114866 Invalid, 0 Unknown, 0 Unchecked, 48.9s Time] [2023-12-18 18:42:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31843 states. [2023-12-18 18:42:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31843 to 3897. [2023-12-18 18:42:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 2755 states have (on average 1.4896551724137932) internal successors, (4104), 2755 states have internal predecessors, (4104), 1125 states have call successors, (1125), 16 states have call predecessors, (1125), 16 states have return successors, (1125), 1125 states have call predecessors, (1125), 1125 states have call successors, (1125) [2023-12-18 18:42:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 6354 transitions. [2023-12-18 18:42:14,218 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 6354 transitions. Word has length 91 [2023-12-18 18:42:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:14,218 INFO L495 AbstractCegarLoop]: Abstraction has 3897 states and 6354 transitions. [2023-12-18 18:42:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 4 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-12-18 18:42:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 6354 transitions. [2023-12-18 18:42:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-18 18:42:14,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:14,221 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:14,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:14,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:14,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash -875803794, now seen corresponding path program 1 times [2023-12-18 18:42:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166891075] [2023-12-18 18:42:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 18:42:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 18:42:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 18:42:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-18 18:42:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 18:42:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-18 18:42:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-18 18:42:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-18 18:42:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-18 18:42:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-18 18:42:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:42:14,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166891075] [2023-12-18 18:42:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166891075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863757446] [2023-12-18 18:42:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:14,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:14,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:14,811 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) [2023-12-18 18:42:14,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 18:42:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:14,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-18 18:42:14,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:15,178 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 [2023-12-18 18:42:15,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 18:42:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:42:15,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:15,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 18:42:15,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 18:42:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-18 18:42:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863757446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:16,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2023-12-18 18:42:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003818100] [2023-12-18 18:42:16,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:16,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 18:42:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 18:42:16,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 18:42:16,003 INFO L87 Difference]: Start difference. First operand 3897 states and 6354 transitions. Second operand has 49 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 49 states have internal predecessors, (179), 6 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30)