/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:53:41,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:53:41,522 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 07:53:41,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:53:41,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:53:41,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:53:41,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:53:41,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:53:41,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:53:41,550 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:53:41,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:53:41,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:53:41,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:53:41,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:53:41,551 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:53:41,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:53:41,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:53:41,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:53:41,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:53:41,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:53:41,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:53:41,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:53:41,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:53:41,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:53:41,554 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:53:41,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:53:41,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:53:41,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:53:41,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:53:41,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:53:41,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:53:41,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:53:41,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:53:41,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:53:41,556 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:53:41,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:53:41,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:53:41,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:53:41,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:53:41,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:53:41,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:53:41,761 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:53:41,761 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:53:41,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr2.c [2023-12-20 07:53:42,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:53:43,059 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:53:43,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr2.c [2023-12-20 07:53:43,065 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a71f28e4/ed47854654b044ddb7b573afed115137/FLAG325f1eddf [2023-12-20 07:53:43,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a71f28e4/ed47854654b044ddb7b573afed115137 [2023-12-20 07:53:43,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:53:43,080 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:53:43,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:53:43,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:53:43,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:53:43,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390094b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43, skipping insertion in model container [2023-12-20 07:53:43,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,102 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:53:43,212 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/pr2.c[394,407] [2023-12-20 07:53:43,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:53:43,229 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:53:43,238 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/pr2.c[394,407] [2023-12-20 07:53:43,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:53:43,253 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:53:43,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43 WrapperNode [2023-12-20 07:53:43,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:53:43,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:53:43,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:53:43,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:53:43,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,278 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-12-20 07:53:43,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:53:43,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:53:43,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:53:43,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:53:43,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,288 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,297 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 4 writes are split as follows [0, 0, 4]. [2023-12-20 07:53:43,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:53:43,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:53:43,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:53:43,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:53:43,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (1/1) ... [2023-12-20 07:53:43,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:53:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:43,335 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) [2023-12-20 07:53:43,360 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 [2023-12-20 07:53:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:53:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:53:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:53:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 07:53:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:53:43,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 07:53:43,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:53:43,424 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:53:43,426 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:53:43,540 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:53:43,560 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:53:43,560 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 07:53:43,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:53:43 BoogieIcfgContainer [2023-12-20 07:53:43,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:53:43,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:53:43,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:53:43,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:53:43,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:53:43" (1/3) ... [2023-12-20 07:53:43,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:53:43, skipping insertion in model container [2023-12-20 07:53:43,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:53:43" (2/3) ... [2023-12-20 07:53:43,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:53:43, skipping insertion in model container [2023-12-20 07:53:43,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:53:43" (3/3) ... [2023-12-20 07:53:43,570 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2023-12-20 07:53:43,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:53:43,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:53:43,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:53:43,641 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;@329e0c73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:53:43,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:53:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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) [2023-12-20 07:53:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 07:53:43,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:43,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:43,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:43,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1365372683, now seen corresponding path program 1 times [2023-12-20 07:53:43,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:43,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269683546] [2023-12-20 07:53:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269683546] [2023-12-20 07:53:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269683546] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:43,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 07:53:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167361990] [2023-12-20 07:53:43,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 07:53:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 07:53:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 07:53:43,883 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-20 07:53:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:43,917 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-12-20 07:53:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 07:53:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-12-20 07:53:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:43,923 INFO L225 Difference]: With dead ends: 38 [2023-12-20 07:53:43,923 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 07:53:43,925 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 [2023-12-20 07:53:43,927 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:43,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 07:53:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-20 07:53:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-12-20 07:53:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-20 07:53:43,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-12-20 07:53:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:43,949 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-20 07:53:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-20 07:53:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-20 07:53:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 07:53:43,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:43,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:43,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 07:53:43,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:43,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2045431053, now seen corresponding path program 1 times [2023-12-20 07:53:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:43,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634058897] [2023-12-20 07:53:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634058897] [2023-12-20 07:53:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634058897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:44,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 07:53:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627004541] [2023-12-20 07:53:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 07:53:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 07:53:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 07:53:44,090 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-20 07:53:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:44,137 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-12-20 07:53:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 07:53:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2023-12-20 07:53:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:44,138 INFO L225 Difference]: With dead ends: 22 [2023-12-20 07:53:44,138 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 07:53:44,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:53:44,140 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:44,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 07:53:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-12-20 07:53:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-12-20 07:53:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 07:53:44,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-12-20 07:53:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:44,148 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 07:53:44,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-20 07:53:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 07:53:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 07:53:44,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:44,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:44,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 07:53:44,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:44,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2045490635, now seen corresponding path program 1 times [2023-12-20 07:53:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:44,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804198117] [2023-12-20 07:53:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:44,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:44,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804198117] [2023-12-20 07:53:44,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804198117] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:44,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:44,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 07:53:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243487783] [2023-12-20 07:53:44,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:44,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 07:53:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 07:53:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:53:44,366 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-12-20 07:53:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:44,410 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-12-20 07:53:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 07:53:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2023-12-20 07:53:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:44,413 INFO L225 Difference]: With dead ends: 33 [2023-12-20 07:53:44,414 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 07:53:44,414 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 [2023-12-20 07:53:44,415 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:44,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 07:53:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-12-20 07:53:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 07:53:44,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-20 07:53:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:44,423 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 07:53:44,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-12-20 07:53:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 07:53:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 07:53:44,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:44,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 07:53:44,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:44,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash 199609668, now seen corresponding path program 1 times [2023-12-20 07:53:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:44,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513310880] [2023-12-20 07:53:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513310880] [2023-12-20 07:53:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513310880] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671507665] [2023-12-20 07:53:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:44,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:44,825 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) [2023-12-20 07:53:44,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 07:53:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:44,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 07:53:44,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:44,962 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 [2023-12-20 07:53:44,986 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 [2023-12-20 07:53:45,039 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 [2023-12-20 07:53:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:45,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:45,117 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 [2023-12-20 07:53:45,120 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 14 [2023-12-20 07:53:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:45,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671507665] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:45,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:45,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2023-12-20 07:53:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815434590] [2023-12-20 07:53:45,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:45,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 07:53:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 07:53:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-12-20 07:53:45,140 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:45,511 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2023-12-20 07:53:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 07:53:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 07:53:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:45,514 INFO L225 Difference]: With dead ends: 102 [2023-12-20 07:53:45,514 INFO L226 Difference]: Without dead ends: 88 [2023-12-20 07:53:45,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 07:53:45,517 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:45,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 90 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-20 07:53:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 33. [2023-12-20 07:53:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-20 07:53:45,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2023-12-20 07:53:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:45,532 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-20 07:53:45,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-20 07:53:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 07:53:45,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:45,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:45,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 07:53:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:45,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash -193417342, now seen corresponding path program 1 times [2023-12-20 07:53:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189715816] [2023-12-20 07:53:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:45,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:45,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189715816] [2023-12-20 07:53:45,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189715816] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:45,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:45,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 07:53:45,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935227149] [2023-12-20 07:53:45,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:45,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 07:53:45,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 07:53:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 07:53:45,777 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-12-20 07:53:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:45,811 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-12-20 07:53:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 07:53:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2023-12-20 07:53:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:45,812 INFO L225 Difference]: With dead ends: 56 [2023-12-20 07:53:45,812 INFO L226 Difference]: Without dead ends: 42 [2023-12-20 07:53:45,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:53:45,813 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:45,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-20 07:53:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2023-12-20 07:53:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2023-12-20 07:53:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-12-20 07:53:45,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2023-12-20 07:53:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:45,826 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-12-20 07:53:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-12-20 07:53:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-12-20 07:53:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 07:53:45,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:45,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 07:53:45,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash 486641028, now seen corresponding path program 1 times [2023-12-20 07:53:45,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:45,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229484401] [2023-12-20 07:53:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:45,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229484401] [2023-12-20 07:53:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229484401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580291608] [2023-12-20 07:53:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:45,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:45,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:45,986 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) [2023-12-20 07:53:46,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 07:53:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:46,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 07:53:46,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:46,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:53:46,064 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 [2023-12-20 07:53:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:46,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:46,134 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 [2023-12-20 07:53:46,135 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 [2023-12-20 07:53:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:46,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580291608] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:46,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:46,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2023-12-20 07:53:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136654760] [2023-12-20 07:53:46,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:46,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:53:46,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:53:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:53:46,145 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:46,356 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-12-20 07:53:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 07:53:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-20 07:53:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:46,356 INFO L225 Difference]: With dead ends: 72 [2023-12-20 07:53:46,356 INFO L226 Difference]: Without dead ends: 70 [2023-12-20 07:53:46,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-12-20 07:53:46,357 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:46,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 93 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-20 07:53:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2023-12-20 07:53:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-12-20 07:53:46,366 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2023-12-20 07:53:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:46,366 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-12-20 07:53:46,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-12-20 07:53:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 07:53:46,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:46,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:46,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 07:53:46,574 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,SelfDestructingSolverStorable5 [2023-12-20 07:53:46,575 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:46,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1237798271, now seen corresponding path program 1 times [2023-12-20 07:53:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:46,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361267841] [2023-12-20 07:53:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361267841] [2023-12-20 07:53:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361267841] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:53:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421650277] [2023-12-20 07:53:46,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:53:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:53:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:53:46,593 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:46,621 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-12-20 07:53:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:53:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 07:53:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:46,622 INFO L225 Difference]: With dead ends: 58 [2023-12-20 07:53:46,622 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 07:53:46,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:53:46,622 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:46,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 07:53:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-12-20 07:53:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-12-20 07:53:46,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2023-12-20 07:53:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:46,627 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-12-20 07:53:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-12-20 07:53:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-20 07:53:46,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:46,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:46,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 07:53:46,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:46,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash -470241182, now seen corresponding path program 1 times [2023-12-20 07:53:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:46,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738953911] [2023-12-20 07:53:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738953911] [2023-12-20 07:53:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738953911] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510279385] [2023-12-20 07:53:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:46,811 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) [2023-12-20 07:53:46,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 07:53:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:46,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 07:53:46,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:46,886 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 [2023-12-20 07:53:46,951 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 [2023-12-20 07:53:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:46,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:46,998 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 19 treesize of output 17 [2023-12-20 07:53:47,000 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 14 [2023-12-20 07:53:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510279385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:47,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:47,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-12-20 07:53:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076807699] [2023-12-20 07:53:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 07:53:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 07:53:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-12-20 07:53:47,011 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:47,170 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-12-20 07:53:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 07:53:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-20 07:53:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:47,171 INFO L225 Difference]: With dead ends: 72 [2023-12-20 07:53:47,171 INFO L226 Difference]: Without dead ends: 63 [2023-12-20 07:53:47,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:53:47,171 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:47,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-20 07:53:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2023-12-20 07:53:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-12-20 07:53:47,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2023-12-20 07:53:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:47,175 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-12-20 07:53:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-12-20 07:53:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-20 07:53:47,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:47,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 07:53:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:47,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:47,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1481358432, now seen corresponding path program 1 times [2023-12-20 07:53:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552848362] [2023-12-20 07:53:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552848362] [2023-12-20 07:53:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552848362] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562630405] [2023-12-20 07:53:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:47,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:47,520 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) [2023-12-20 07:53:47,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 07:53:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:47,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-20 07:53:47,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:47,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:53:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:47,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:47,672 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 [2023-12-20 07:53:47,673 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 [2023-12-20 07:53:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562630405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:47,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-12-20 07:53:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363673077] [2023-12-20 07:53:47,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:53:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:53:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:53:47,683 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2023-12-20 07:53:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:47,863 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-12-20 07:53:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 07:53:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 21 [2023-12-20 07:53:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:47,864 INFO L225 Difference]: With dead ends: 78 [2023-12-20 07:53:47,864 INFO L226 Difference]: Without dead ends: 76 [2023-12-20 07:53:47,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:53:47,865 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-20 07:53:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2023-12-20 07:53:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-12-20 07:53:47,869 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 21 [2023-12-20 07:53:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:47,870 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-12-20 07:53:47,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2023-12-20 07:53:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-12-20 07:53:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 07:53:47,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:47,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:47,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 07:53:48,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:48,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:48,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:48,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2076003001, now seen corresponding path program 1 times [2023-12-20 07:53:48,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:48,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519319472] [2023-12-20 07:53:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:48,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 07:53:48,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519319472] [2023-12-20 07:53:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519319472] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:53:48,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:53:48,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:53:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919306806] [2023-12-20 07:53:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:53:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:53:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:53:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:53:48,096 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-12-20 07:53:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:48,110 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-12-20 07:53:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:53:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 07:53:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:48,111 INFO L225 Difference]: With dead ends: 74 [2023-12-20 07:53:48,111 INFO L226 Difference]: Without dead ends: 58 [2023-12-20 07:53:48,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:53:48,111 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:48,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:53:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-20 07:53:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2023-12-20 07:53:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2023-12-20 07:53:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-12-20 07:53:48,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2023-12-20 07:53:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:48,116 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-12-20 07:53:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-12-20 07:53:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-12-20 07:53:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 07:53:48,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:48,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:48,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 07:53:48,116 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:48,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash -697495548, now seen corresponding path program 2 times [2023-12-20 07:53:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:48,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663072297] [2023-12-20 07:53:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:48,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:48,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663072297] [2023-12-20 07:53:48,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663072297] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:48,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526517863] [2023-12-20 07:53:48,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:53:48,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:48,290 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) [2023-12-20 07:53:48,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 07:53:48,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:53:48,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:53:48,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 07:53:48,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:48,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:48,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526517863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:48,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:48,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-12-20 07:53:48,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770483366] [2023-12-20 07:53:48,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:48,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 07:53:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 07:53:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:53:48,595 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-12-20 07:53:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:48,723 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2023-12-20 07:53:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 07:53:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 07:53:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:48,724 INFO L225 Difference]: With dead ends: 99 [2023-12-20 07:53:48,724 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 07:53:48,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-12-20 07:53:48,725 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:48,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 67 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 07:53:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-12-20 07:53:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 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) [2023-12-20 07:53:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-12-20 07:53:48,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 26 [2023-12-20 07:53:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:48,730 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-12-20 07:53:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-12-20 07:53:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-12-20 07:53:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 07:53:48,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:48,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:48,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 07:53:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 07:53:48,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:48,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1708646467, now seen corresponding path program 3 times [2023-12-20 07:53:48,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:48,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265263712] [2023-12-20 07:53:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:49,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265263712] [2023-12-20 07:53:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265263712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484524579] [2023-12-20 07:53:49,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:53:49,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:49,192 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) [2023-12-20 07:53:49,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 07:53:49,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 07:53:49,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:53:49,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 07:53:49,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:49,331 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 [2023-12-20 07:53:49,354 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 [2023-12-20 07:53:49,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:49,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2023-12-20 07:53:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:49,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:49,684 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 27 treesize of output 25 [2023-12-20 07:53:49,688 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 24 treesize of output 20 [2023-12-20 07:53:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:49,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484524579] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:49,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:49,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-12-20 07:53:49,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72989301] [2023-12-20 07:53:49,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:49,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 07:53:49,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 07:53:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-12-20 07:53:49,752 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 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) [2023-12-20 07:53:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:50,497 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2023-12-20 07:53:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 07:53:50,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-20 07:53:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:50,498 INFO L225 Difference]: With dead ends: 133 [2023-12-20 07:53:50,498 INFO L226 Difference]: Without dead ends: 124 [2023-12-20 07:53:50,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 07:53:50,500 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 290 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:50,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 165 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:53:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-20 07:53:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2023-12-20 07:53:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-12-20 07:53:50,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 30 [2023-12-20 07:53:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:50,506 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-12-20 07:53:50,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 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) [2023-12-20 07:53:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-12-20 07:53:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 07:53:50,507 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:50,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:50,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-20 07:53:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:50,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:50,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1859723203, now seen corresponding path program 1 times [2023-12-20 07:53:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:50,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137637737] [2023-12-20 07:53:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:50,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137637737] [2023-12-20 07:53:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137637737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939321252] [2023-12-20 07:53:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:50,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:50,914 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) [2023-12-20 07:53:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 07:53:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:50,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-20 07:53:50,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:51,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:53:51,029 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 [2023-12-20 07:53:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:51,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:51,245 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 [2023-12-20 07:53:51,246 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 [2023-12-20 07:53:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939321252] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:51,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2023-12-20 07:53:51,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574896596] [2023-12-20 07:53:51,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:51,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 07:53:51,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 07:53:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-12-20 07:53:51,254 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-12-20 07:53:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:51,681 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-12-20 07:53:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 07:53:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-20 07:53:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:51,681 INFO L225 Difference]: With dead ends: 119 [2023-12-20 07:53:51,682 INFO L226 Difference]: Without dead ends: 117 [2023-12-20 07:53:51,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 07:53:51,682 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:51,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 141 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:53:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-20 07:53:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2023-12-20 07:53:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 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) [2023-12-20 07:53:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-12-20 07:53:51,689 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2023-12-20 07:53:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:51,689 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-12-20 07:53:51,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-12-20 07:53:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-12-20 07:53:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 07:53:51,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:51,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:51,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 07:53:51,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:51,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:51,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2072433147, now seen corresponding path program 2 times [2023-12-20 07:53:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:51,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774120626] [2023-12-20 07:53:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:52,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774120626] [2023-12-20 07:53:52,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774120626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628824000] [2023-12-20 07:53:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:53:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:52,102 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) [2023-12-20 07:53:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 07:53:52,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:53:52,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:53:52,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 07:53:52,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:52,178 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 11 treesize of output 7 [2023-12-20 07:53:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:52,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:52,338 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 [2023-12-20 07:53:52,340 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 [2023-12-20 07:53:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628824000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:52,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:52,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 20 [2023-12-20 07:53:52,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083955826] [2023-12-20 07:53:52,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 07:53:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 07:53:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-20 07:53:52,369 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:52,929 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2023-12-20 07:53:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 07:53:52,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-20 07:53:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:52,930 INFO L225 Difference]: With dead ends: 147 [2023-12-20 07:53:52,930 INFO L226 Difference]: Without dead ends: 145 [2023-12-20 07:53:52,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 07:53:52,931 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:52,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 154 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:53:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-20 07:53:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2023-12-20 07:53:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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) [2023-12-20 07:53:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-12-20 07:53:52,938 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 35 [2023-12-20 07:53:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-12-20 07:53:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:53:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-12-20 07:53:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 07:53:52,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:52,939 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:52,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-20 07:53:53,143 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,SelfDestructingSolverStorable13 [2023-12-20 07:53:53,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:53,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1685496003, now seen corresponding path program 4 times [2023-12-20 07:53:53,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:53,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412323973] [2023-12-20 07:53:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:53,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412323973] [2023-12-20 07:53:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412323973] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713588842] [2023-12-20 07:53:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:53:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:53,428 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) [2023-12-20 07:53:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 07:53:53,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:53:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:53:53,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-20 07:53:53,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:53,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713588842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:53,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2023-12-20 07:53:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232478831] [2023-12-20 07:53:53,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 07:53:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 07:53:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 07:53:53,952 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 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) [2023-12-20 07:53:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:53:54,271 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2023-12-20 07:53:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 07:53:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-20 07:53:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:53:54,275 INFO L225 Difference]: With dead ends: 168 [2023-12-20 07:53:54,275 INFO L226 Difference]: Without dead ends: 106 [2023-12-20 07:53:54,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 07:53:54,279 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:53:54,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 118 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:53:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-20 07:53:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2023-12-20 07:53:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 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) [2023-12-20 07:53:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-12-20 07:53:54,302 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 40 [2023-12-20 07:53:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:53:54,302 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-12-20 07:53:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 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) [2023-12-20 07:53:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-12-20 07:53:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 07:53:54,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:53:54,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:53:54,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 07:53:54,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 07:53:54,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:53:54,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:53:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2033322186, now seen corresponding path program 5 times [2023-12-20 07:53:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:53:54,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775202570] [2023-12-20 07:53:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:53:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:53:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:53:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:54,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:53:54,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775202570] [2023-12-20 07:53:54,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775202570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:53:54,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685378477] [2023-12-20 07:53:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:53:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:53:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:53:54,794 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) [2023-12-20 07:53:54,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 07:53:54,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 07:53:54,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:53:54,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 07:53:54,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:53:54,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:53:54,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 07:53:54,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:54,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 07:53:55,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:55,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2023-12-20 07:53:55,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:55,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 48 [2023-12-20 07:53:55,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:55,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 22 [2023-12-20 07:53:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:55,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:53:56,073 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 95 treesize of output 91 [2023-12-20 07:53:56,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:53:56,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 534 [2023-12-20 07:53:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:53:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685378477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:53:56,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:53:56,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 48 [2023-12-20 07:53:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497933919] [2023-12-20 07:53:56,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:53:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 07:53:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:53:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 07:53:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 07:53:56,147 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 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) [2023-12-20 07:54:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:00,687 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2023-12-20 07:54:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-20 07:54:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 07:54:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:00,692 INFO L225 Difference]: With dead ends: 270 [2023-12-20 07:54:00,692 INFO L226 Difference]: Without dead ends: 261 [2023-12-20 07:54:00,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1947, Invalid=11163, Unknown=0, NotChecked=0, Total=13110 [2023-12-20 07:54:00,696 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 761 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:00,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 413 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 07:54:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-20 07:54:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 142. [2023-12-20 07:54:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 states have internal predecessors, (159), 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) [2023-12-20 07:54:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2023-12-20 07:54:00,717 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 44 [2023-12-20 07:54:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:00,732 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2023-12-20 07:54:00,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 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) [2023-12-20 07:54:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2023-12-20 07:54:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 07:54:00,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:00,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:00,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:00,933 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,SelfDestructingSolverStorable15 [2023-12-20 07:54:00,934 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:00,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1748917570, now seen corresponding path program 3 times [2023-12-20 07:54:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:00,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212402962] [2023-12-20 07:54:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:00,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:01,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212402962] [2023-12-20 07:54:01,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212402962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:01,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526859351] [2023-12-20 07:54:01,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:54:01,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:01,240 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) [2023-12-20 07:54:01,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 07:54:01,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 07:54:01,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:01,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-20 07:54:01,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:01,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:54:01,423 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 [2023-12-20 07:54:01,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 07:54:01,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:01,491 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 30 treesize of output 21 [2023-12-20 07:54:01,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:01,527 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 27 treesize of output 25 [2023-12-20 07:54:01,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:01,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2023-12-20 07:54:01,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:01,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-12-20 07:54:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:01,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:02,665 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 61 treesize of output 57 [2023-12-20 07:54:02,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:02,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 440 [2023-12-20 07:54:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:02,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526859351] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:02,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 48 [2023-12-20 07:54:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128373731] [2023-12-20 07:54:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 07:54:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 07:54:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2029, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 07:54:02,800 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 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) [2023-12-20 07:54:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:05,336 INFO L93 Difference]: Finished difference Result 246 states and 269 transitions. [2023-12-20 07:54:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-20 07:54:05,336 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 07:54:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:05,337 INFO L225 Difference]: With dead ends: 246 [2023-12-20 07:54:05,337 INFO L226 Difference]: Without dead ends: 237 [2023-12-20 07:54:05,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1245, Invalid=7311, Unknown=0, NotChecked=0, Total=8556 [2023-12-20 07:54:05,339 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 494 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:05,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 305 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 07:54:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-12-20 07:54:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 121. [2023-12-20 07:54:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:54:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2023-12-20 07:54:05,351 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 44 [2023-12-20 07:54:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:05,352 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2023-12-20 07:54:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 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) [2023-12-20 07:54:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2023-12-20 07:54:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 07:54:05,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:05,352 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:05,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:05,557 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,SelfDestructingSolverStorable16 [2023-12-20 07:54:05,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:05,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash 984283126, now seen corresponding path program 2 times [2023-12-20 07:54:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:05,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772072133] [2023-12-20 07:54:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:05,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772072133] [2023-12-20 07:54:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772072133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412231441] [2023-12-20 07:54:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:54:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:05,805 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) [2023-12-20 07:54:05,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 07:54:05,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:54:05,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:05,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-20 07:54:05,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:05,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:54:05,950 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 [2023-12-20 07:54:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:06,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:06,220 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 [2023-12-20 07:54:06,221 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 [2023-12-20 07:54:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412231441] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:06,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2023-12-20 07:54:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662618764] [2023-12-20 07:54:06,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-20 07:54:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-20 07:54:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-12-20 07:54:06,229 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-12-20 07:54:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:06,885 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2023-12-20 07:54:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-20 07:54:06,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 07:54:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:06,886 INFO L225 Difference]: With dead ends: 191 [2023-12-20 07:54:06,886 INFO L226 Difference]: Without dead ends: 189 [2023-12-20 07:54:06,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=3745, Unknown=0, NotChecked=0, Total=4290 [2023-12-20 07:54:06,888 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:06,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 196 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 07:54:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-20 07:54:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2023-12-20 07:54:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 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) [2023-12-20 07:54:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2023-12-20 07:54:06,900 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 44 [2023-12-20 07:54:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:06,900 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2023-12-20 07:54:06,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-12-20 07:54:06,900 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2023-12-20 07:54:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 07:54:06,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:06,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:06,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:07,105 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,SelfDestructingSolverStorable17 [2023-12-20 07:54:07,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:07,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash -647620246, now seen corresponding path program 4 times [2023-12-20 07:54:07,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:07,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82339912] [2023-12-20 07:54:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:07,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:07,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:07,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82339912] [2023-12-20 07:54:07,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82339912] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:07,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924444999] [2023-12-20 07:54:07,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:54:07,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:07,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:07,377 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) [2023-12-20 07:54:07,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 07:54:07,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:54:07,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:07,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-20 07:54:07,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:07,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:54:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:07,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:07,716 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 [2023-12-20 07:54:07,717 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 [2023-12-20 07:54:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924444999] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:07,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 25 [2023-12-20 07:54:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815184063] [2023-12-20 07:54:07,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 07:54:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 07:54:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-12-20 07:54:07,729 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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) [2023-12-20 07:54:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:08,879 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2023-12-20 07:54:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-20 07:54:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-20 07:54:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:08,880 INFO L225 Difference]: With dead ends: 261 [2023-12-20 07:54:08,880 INFO L226 Difference]: Without dead ends: 259 [2023-12-20 07:54:08,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=6600, Unknown=0, NotChecked=0, Total=7310 [2023-12-20 07:54:08,883 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:08,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 270 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 07:54:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-20 07:54:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 136. [2023-12-20 07:54:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:54:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2023-12-20 07:54:08,905 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 49 [2023-12-20 07:54:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:08,905 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2023-12-20 07:54:08,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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) [2023-12-20 07:54:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2023-12-20 07:54:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 07:54:08,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:08,906 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:08,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:09,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:09,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:09,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash 807859062, now seen corresponding path program 6 times [2023-12-20 07:54:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:09,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876047962] [2023-12-20 07:54:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:09,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876047962] [2023-12-20 07:54:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876047962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371874245] [2023-12-20 07:54:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:54:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:09,546 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) [2023-12-20 07:54:09,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 07:54:09,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 07:54:09,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:09,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 07:54:09,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:10,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371874245] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:10,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:10,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2023-12-20 07:54:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110801590] [2023-12-20 07:54:10,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 07:54:10,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 07:54:10,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:54:10,322 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 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) [2023-12-20 07:54:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:10,568 INFO L93 Difference]: Finished difference Result 262 states and 289 transitions. [2023-12-20 07:54:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 07:54:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-20 07:54:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:10,569 INFO L225 Difference]: With dead ends: 262 [2023-12-20 07:54:10,570 INFO L226 Difference]: Without dead ends: 170 [2023-12-20 07:54:10,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 07:54:10,571 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 222 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:10,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 175 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 07:54:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-20 07:54:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 144. [2023-12-20 07:54:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 143 states have internal predecessors, (159), 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) [2023-12-20 07:54:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2023-12-20 07:54:10,585 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 54 [2023-12-20 07:54:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:10,586 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2023-12-20 07:54:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 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) [2023-12-20 07:54:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2023-12-20 07:54:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 07:54:10,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:10,586 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:10,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:10,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:10,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash 33366654, now seen corresponding path program 7 times [2023-12-20 07:54:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:10,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463569462] [2023-12-20 07:54:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463569462] [2023-12-20 07:54:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463569462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536935657] [2023-12-20 07:54:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:54:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:11,298 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) [2023-12-20 07:54:11,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 07:54:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:11,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 07:54:11,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:11,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:54:11,530 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 22 [2023-12-20 07:54:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:11,564 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 34 treesize of output 36 [2023-12-20 07:54:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:11,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2023-12-20 07:54:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:11,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:11,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 61 [2023-12-20 07:54:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:13,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:13,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 16 [2023-12-20 07:54:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:13,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:18,433 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 35 treesize of output 33 [2023-12-20 07:54:18,435 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 114 treesize of output 110 [2023-12-20 07:54:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536935657] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:18,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18] total 52 [2023-12-20 07:54:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192295176] [2023-12-20 07:54:18,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:18,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-20 07:54:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-20 07:54:18,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2389, Unknown=3, NotChecked=0, Total=2652 [2023-12-20 07:54:18,575 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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) [2023-12-20 07:54:23,920 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] [2023-12-20 07:54:27,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:54:31,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:54:36,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:54:42,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:54:46,175 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] [2023-12-20 07:54:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:47,236 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2023-12-20 07:54:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-20 07:54:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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 57 [2023-12-20 07:54:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:47,237 INFO L225 Difference]: With dead ends: 233 [2023-12-20 07:54:47,238 INFO L226 Difference]: Without dead ends: 224 [2023-12-20 07:54:47,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1183, Invalid=8516, Unknown=3, NotChecked=0, Total=9702 [2023-12-20 07:54:47,240 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 297 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 83 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:47,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 555 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1418 Invalid, 7 Unknown, 0 Unchecked, 26.3s Time] [2023-12-20 07:54:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-20 07:54:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 139. [2023-12-20 07:54:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.108695652173913) internal successors, (153), 138 states have internal predecessors, (153), 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) [2023-12-20 07:54:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2023-12-20 07:54:47,260 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 57 [2023-12-20 07:54:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:47,261 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2023-12-20 07:54:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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) [2023-12-20 07:54:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2023-12-20 07:54:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 07:54:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:47,261 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:47,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 07:54:47,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:47,466 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:47,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:47,466 INFO L85 PathProgramCache]: Analyzing trace with hash -427711569, now seen corresponding path program 8 times [2023-12-20 07:54:47,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:47,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087605269] [2023-12-20 07:54:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:47,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:47,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:47,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087605269] [2023-12-20 07:54:47,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087605269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:47,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521482850] [2023-12-20 07:54:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:54:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:47,884 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) [2023-12-20 07:54:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 07:54:47,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:54:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:47,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 07:54:47,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:48,121 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 [2023-12-20 07:54:48,147 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 [2023-12-20 07:54:48,416 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 [2023-12-20 07:54:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:48,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:48,628 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 19 treesize of output 17 [2023-12-20 07:54:48,629 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 24 treesize of output 20 [2023-12-20 07:54:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521482850] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:54:48,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:54:48,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 46 [2023-12-20 07:54:48,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486512219] [2023-12-20 07:54:48,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:54:48,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-20 07:54:48,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:54:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-20 07:54:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 07:54:48,731 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 46 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 46 states have internal predecessors, (164), 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) [2023-12-20 07:54:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:54:51,362 INFO L93 Difference]: Finished difference Result 301 states and 331 transitions. [2023-12-20 07:54:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-20 07:54:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 46 states have internal predecessors, (164), 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 58 [2023-12-20 07:54:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:54:51,365 INFO L225 Difference]: With dead ends: 301 [2023-12-20 07:54:51,365 INFO L226 Difference]: Without dead ends: 292 [2023-12-20 07:54:51,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1512, Invalid=14238, Unknown=0, NotChecked=0, Total=15750 [2023-12-20 07:54:51,367 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 381 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:54:51,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 547 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 07:54:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-20 07:54:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 149. [2023-12-20 07:54:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 148 states have internal predecessors, (164), 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) [2023-12-20 07:54:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2023-12-20 07:54:51,389 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 58 [2023-12-20 07:54:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:54:51,389 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2023-12-20 07:54:51,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 46 states have internal predecessors, (164), 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) [2023-12-20 07:54:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2023-12-20 07:54:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 07:54:51,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:54:51,390 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:54:51,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-20 07:54:51,592 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,SelfDestructingSolverStorable21 [2023-12-20 07:54:51,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:54:51,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:54:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1200872273, now seen corresponding path program 3 times [2023-12-20 07:54:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:54:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762628776] [2023-12-20 07:54:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:54:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:54:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:54:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:54:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:54:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762628776] [2023-12-20 07:54:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762628776] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:54:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85399928] [2023-12-20 07:54:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:54:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:54:52,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:54:52,040 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) [2023-12-20 07:54:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 07:54:52,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 07:54:52,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:54:52,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-20 07:54:52,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:54:52,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:54:52,240 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 [2023-12-20 07:54:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,287 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 22 [2023-12-20 07:54:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:52,326 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 42 treesize of output 25 [2023-12-20 07:54:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:52,396 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 34 treesize of output 36 [2023-12-20 07:54:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:52,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2023-12-20 07:54:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:52,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-12-20 07:54:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:54:52,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:54:52,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 53 [2023-12-20 07:54:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-20 07:54:53,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:54:58,399 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse1 (div c_~CELLCOUNT~0 2)) (.cse2 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 1))) (let ((.cse0 (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int) (|v_ULTIMATE.start_main_~i~0#1_234| Int) (|v_ULTIMATE.start_main_~i~0#1_236| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (< |v_ULTIMATE.start_main_~i~0#1_236| .cse4) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |v_ULTIMATE.start_main_~i~0#1_235| 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| .cse1) (< (select (store (store (store .cse2 (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_236|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_235|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_234|) (- 8)) 0) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) .cse3))))) (and (or .cse0 (not (= (mod c_~CELLCOUNT~0 2) 0))) (or .cse0 (< c_~CELLCOUNT~0 0)) (forall ((|v_ULTIMATE.start_main_~i~0#1_236| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_234| (+ .cse1 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |v_ULTIMATE.start_main_~i~0#1_235| 1)) (< (select (store (store (store .cse2 (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_236|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_235|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_234|) (- 8)) 0) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) .cse3))))) (< |v_ULTIMATE.start_main_~i~0#1_236| .cse4)))))) is different from false [2023-12-20 07:55:02,479 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (div c_~CELLCOUNT~0 2)) (.cse3 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse4 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 1))) (let ((.cse0 (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int) (|v_ULTIMATE.start_main_~i~0#1_234| Int) (|v_ULTIMATE.start_main_~i~0#1_236| Int) (v_ArrVal_471 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (< |v_ULTIMATE.start_main_~i~0#1_236| .cse1) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |v_ULTIMATE.start_main_~i~0#1_235| 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| .cse2) (< (select (store (store (store (store .cse3 .cse4 v_ArrVal_471) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_236|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_235|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_234|) (- 8)) 0) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) .cse5))))) (and (or .cse0 (< c_~CELLCOUNT~0 0)) (or .cse0 (not (= (mod c_~CELLCOUNT~0 2) 0))) (forall ((|v_ULTIMATE.start_main_~i~0#1_236| Int) (v_ArrVal_471 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_236| .cse1) (forall ((|v_ULTIMATE.start_main_~i~0#1_235| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_235| (+ |v_ULTIMATE.start_main_~i~0#1_236| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_234| (+ .cse2 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |v_ULTIMATE.start_main_~i~0#1_235| 1)) (< (select (store (store (store (store .cse3 .cse4 v_ArrVal_471) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_236|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_235|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_234|) (- 8)) 0) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) .cse5)))))))))) is different from false [2023-12-20 07:55:02,503 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 49 treesize of output 47 [2023-12-20 07:55:02,506 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 232 treesize of output 230 [2023-12-20 07:55:02,628 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 49 treesize of output 47 [2023-12-20 07:55:02,631 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 232 treesize of output 230 [2023-12-20 07:55:02,761 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 41 treesize of output 39 [2023-12-20 07:55:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 6 not checked. [2023-12-20 07:55:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85399928] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:55:02,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:55:02,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2023-12-20 07:55:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121391614] [2023-12-20 07:55:02,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:55:02,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 07:55:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:55:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 07:55:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1538, Unknown=2, NotChecked=162, Total=1892 [2023-12-20 07:55:02,833 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 44 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 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) [2023-12-20 07:55:26,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:30,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:31,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:34,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:38,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:47,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:55:52,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:00,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:08,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:17,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:21,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:29,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:33,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:42,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:46,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:55,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:56:59,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:57:03,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:57:19,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:57:23,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:57:27,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:57:31,107 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] [2023-12-20 07:57:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:31,107 INFO L93 Difference]: Finished difference Result 253 states and 281 transitions. [2023-12-20 07:57:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-20 07:57:31,112 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 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 58 [2023-12-20 07:57:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:31,113 INFO L225 Difference]: With dead ends: 253 [2023-12-20 07:57:31,113 INFO L226 Difference]: Without dead ends: 219 [2023-12-20 07:57:31,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3536 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=1872, Invalid=11228, Unknown=18, NotChecked=454, Total=13572 [2023-12-20 07:57:31,114 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 436 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 194 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 88.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:31,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 257 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1808 Invalid, 28 Unknown, 318 Unchecked, 88.5s Time] [2023-12-20 07:57:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-20 07:57:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 154. [2023-12-20 07:57:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0980392156862746) internal successors, (168), 153 states have internal predecessors, (168), 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) [2023-12-20 07:57:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2023-12-20 07:57:31,141 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 58 [2023-12-20 07:57:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:31,141 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2023-12-20 07:57:31,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 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) [2023-12-20 07:57:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2023-12-20 07:57:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-20 07:57:31,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:31,142 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:31,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:31,345 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:31,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1441342679, now seen corresponding path program 9 times [2023-12-20 07:57:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:31,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426787042] [2023-12-20 07:57:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426787042] [2023-12-20 07:57:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426787042] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935194097] [2023-12-20 07:57:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:57:31,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:31,716 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) [2023-12-20 07:57:31,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 07:57:31,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 07:57:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:31,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 07:57:31,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:31,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:57:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:32,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:32,467 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 19 treesize of output 17 [2023-12-20 07:57:32,468 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 14 [2023-12-20 07:57:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935194097] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:32,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 42 [2023-12-20 07:57:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343379967] [2023-12-20 07:57:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 07:57:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 07:57:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 07:57:32,555 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 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) [2023-12-20 07:57:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:34,886 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2023-12-20 07:57:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-20 07:57:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 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 63 [2023-12-20 07:57:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:34,888 INFO L225 Difference]: With dead ends: 336 [2023-12-20 07:57:34,888 INFO L226 Difference]: Without dead ends: 327 [2023-12-20 07:57:34,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1258, Invalid=12082, Unknown=0, NotChecked=0, Total=13340 [2023-12-20 07:57:34,889 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 283 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:34,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 403 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 07:57:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-20 07:57:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 159. [2023-12-20 07:57:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0949367088607596) internal successors, (173), 158 states have internal predecessors, (173), 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) [2023-12-20 07:57:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 173 transitions. [2023-12-20 07:57:34,922 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 173 transitions. Word has length 63 [2023-12-20 07:57:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 173 transitions. [2023-12-20 07:57:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 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) [2023-12-20 07:57:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 173 transitions. [2023-12-20 07:57:34,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-20 07:57:34,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:34,922 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:35,128 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:35,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1384835633, now seen corresponding path program 5 times [2023-12-20 07:57:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946554020] [2023-12-20 07:57:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:35,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:35,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946554020] [2023-12-20 07:57:35,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946554020] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:35,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106342649] [2023-12-20 07:57:35,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:57:35,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:35,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:35,460 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) [2023-12-20 07:57:35,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 07:57:35,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-20 07:57:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:35,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-20 07:57:35,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:35,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:57:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:35,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:36,035 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 [2023-12-20 07:57:36,037 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 [2023-12-20 07:57:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106342649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:36,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 34 [2023-12-20 07:57:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382676396] [2023-12-20 07:57:36,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-20 07:57:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-20 07:57:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 07:57:36,048 INFO L87 Difference]: Start difference. First operand 159 states and 173 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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) [2023-12-20 07:57:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:38,746 INFO L93 Difference]: Finished difference Result 414 states and 456 transitions. [2023-12-20 07:57:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-12-20 07:57:38,747 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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 63 [2023-12-20 07:57:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:38,748 INFO L225 Difference]: With dead ends: 414 [2023-12-20 07:57:38,748 INFO L226 Difference]: Without dead ends: 412 [2023-12-20 07:57:38,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2054, Invalid=23706, Unknown=0, NotChecked=0, Total=25760 [2023-12-20 07:57:38,750 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 224 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:38,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 504 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 07:57:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-12-20 07:57:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 169. [2023-12-20 07:57:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0952380952380953) internal successors, (184), 168 states have internal predecessors, (184), 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) [2023-12-20 07:57:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2023-12-20 07:57:38,787 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 63 [2023-12-20 07:57:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:38,787 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2023-12-20 07:57:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 34 states have internal predecessors, (132), 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) [2023-12-20 07:57:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2023-12-20 07:57:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-20 07:57:38,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:38,790 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:38,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:38,995 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:38,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:39,000 INFO L85 PathProgramCache]: Analyzing trace with hash -733209425, now seen corresponding path program 10 times [2023-12-20 07:57:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:39,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398665086] [2023-12-20 07:57:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:39,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398665086] [2023-12-20 07:57:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398665086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915647041] [2023-12-20 07:57:39,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:57:39,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:39,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:39,443 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:57:39,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 07:57:39,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:57:39,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:39,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-20 07:57:39,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:40,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:40,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915647041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:40,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:40,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2023-12-20 07:57:40,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729395530] [2023-12-20 07:57:40,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:40,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-20 07:57:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-20 07:57:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=2008, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 07:57:40,331 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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) [2023-12-20 07:57:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:40,845 INFO L93 Difference]: Finished difference Result 312 states and 340 transitions. [2023-12-20 07:57:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 07:57:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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 68 [2023-12-20 07:57:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:40,846 INFO L225 Difference]: With dead ends: 312 [2023-12-20 07:57:40,846 INFO L226 Difference]: Without dead ends: 190 [2023-12-20 07:57:40,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1046, Invalid=3646, Unknown=0, NotChecked=0, Total=4692 [2023-12-20 07:57:40,848 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 257 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:40,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 269 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:57:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-20 07:57:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2023-12-20 07:57:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0888888888888888) internal successors, (196), 180 states have internal predecessors, (196), 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) [2023-12-20 07:57:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2023-12-20 07:57:40,885 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 68 [2023-12-20 07:57:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:40,885 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2023-12-20 07:57:40,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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) [2023-12-20 07:57:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2023-12-20 07:57:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 07:57:40,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:40,886 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:40,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:41,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 07:57:41,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:41,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1074623784, now seen corresponding path program 11 times [2023-12-20 07:57:41,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:41,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967445591] [2023-12-20 07:57:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:41,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:41,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967445591] [2023-12-20 07:57:41,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967445591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050140943] [2023-12-20 07:57:41,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:57:41,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:41,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:41,555 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:57:41,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 07:57:41,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 07:57:41,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:41,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 07:57:41,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:41,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:57:41,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 07:57:41,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:41,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 07:57:41,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:41,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 07:57:41,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:41,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 07:57:41,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:41,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-20 07:57:42,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:42,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 65 [2023-12-20 07:57:42,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:42,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 72 [2023-12-20 07:57:43,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:43,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 25 [2023-12-20 07:57:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:43,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:44,141 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 79 treesize of output 75 [2023-12-20 07:57:44,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:57:44,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1199 treesize of output 1071 [2023-12-20 07:57:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050140943] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:44,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:44,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 23] total 67 [2023-12-20 07:57:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891024759] [2023-12-20 07:57:44,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:44,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-20 07:57:44,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-20 07:57:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=4097, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 07:57:44,251 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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) [2023-12-20 07:57:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:53,677 INFO L93 Difference]: Finished difference Result 441 states and 479 transitions. [2023-12-20 07:57:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-12-20 07:57:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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 72 [2023-12-20 07:57:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:53,678 INFO L225 Difference]: With dead ends: 441 [2023-12-20 07:57:53,678 INFO L226 Difference]: Without dead ends: 432 [2023-12-20 07:57:53,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9041 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3645, Invalid=27861, Unknown=0, NotChecked=0, Total=31506 [2023-12-20 07:57:53,680 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1125 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 3933 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 4419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 3933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:53,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 975 Invalid, 4419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 3933 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-20 07:57:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-12-20 07:57:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 254. [2023-12-20 07:57:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1027667984189724) internal successors, (279), 253 states have internal predecessors, (279), 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) [2023-12-20 07:57:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 279 transitions. [2023-12-20 07:57:53,744 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 279 transitions. Word has length 72 [2023-12-20 07:57:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:53,744 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 279 transitions. [2023-12-20 07:57:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 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) [2023-12-20 07:57:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 279 transitions. [2023-12-20 07:57:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 07:57:53,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:53,745 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:53,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 07:57:53,950 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:53,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 754785380, now seen corresponding path program 4 times [2023-12-20 07:57:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981180405] [2023-12-20 07:57:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:54,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981180405] [2023-12-20 07:57:54,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981180405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039797622] [2023-12-20 07:57:54,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:57:54,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:54,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:54,385 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:57:54,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 07:57:54,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:57:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:54,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-20 07:57:54,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:54,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:57:54,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 13 [2023-12-20 07:57:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:54,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:54,951 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 [2023-12-20 07:57:54,952 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 [2023-12-20 07:57:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039797622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:54,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 33 [2023-12-20 07:57:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483913639] [2023-12-20 07:57:54,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 07:57:54,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 07:57:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 07:57:54,970 INFO L87 Difference]: Start difference. First operand 254 states and 279 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:57:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:57:57,686 INFO L93 Difference]: Finished difference Result 482 states and 531 transitions. [2023-12-20 07:57:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-20 07:57:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-20 07:57:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:57:57,687 INFO L225 Difference]: With dead ends: 482 [2023-12-20 07:57:57,687 INFO L226 Difference]: Without dead ends: 480 [2023-12-20 07:57:57,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1485, Invalid=19685, Unknown=0, NotChecked=0, Total=21170 [2023-12-20 07:57:57,689 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 229 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:57:57,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 364 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 07:57:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-20 07:57:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 259. [2023-12-20 07:57:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.1046511627906976) internal successors, (285), 258 states have internal predecessors, (285), 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) [2023-12-20 07:57:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2023-12-20 07:57:57,777 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 72 [2023-12-20 07:57:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:57:57,777 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2023-12-20 07:57:57,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 07:57:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2023-12-20 07:57:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 07:57:57,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:57:57,792 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:57:57,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 07:57:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 07:57:57,993 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:57:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:57:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1799369524, now seen corresponding path program 6 times [2023-12-20 07:57:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:57:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309447051] [2023-12-20 07:57:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:57:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:57:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:57:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:57:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309447051] [2023-12-20 07:57:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309447051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:57:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758762430] [2023-12-20 07:57:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:57:58,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:57:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:57:58,411 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:57:58,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 07:57:58,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-20 07:57:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:57:58,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-20 07:57:58,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:57:58,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 07:57:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:58,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:57:58,952 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 [2023-12-20 07:57:58,957 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 [2023-12-20 07:57:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:57:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758762430] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:57:58,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:57:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 31 [2023-12-20 07:57:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653747732] [2023-12-20 07:57:58,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:57:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 07:57:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:57:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 07:57:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2023-12-20 07:57:58,971 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 31 states, 31 states have (on average 4.193548387096774) internal successors, (130), 31 states have internal predecessors, (130), 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) [2023-12-20 07:58:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:58:03,551 INFO L93 Difference]: Finished difference Result 591 states and 654 transitions. [2023-12-20 07:58:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2023-12-20 07:58:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.193548387096774) internal successors, (130), 31 states have internal predecessors, (130), 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 77 [2023-12-20 07:58:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:58:03,553 INFO L225 Difference]: With dead ends: 591 [2023-12-20 07:58:03,553 INFO L226 Difference]: Without dead ends: 589 [2023-12-20 07:58:03,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19213 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2583, Invalid=45159, Unknown=0, NotChecked=0, Total=47742 [2023-12-20 07:58:03,555 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 294 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 4207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-20 07:58:03,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 521 Invalid, 4207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 3907 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-20 07:58:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-12-20 07:58:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 281. [2023-12-20 07:58:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1107142857142858) internal successors, (311), 280 states have internal predecessors, (311), 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) [2023-12-20 07:58:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2023-12-20 07:58:03,619 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 77 [2023-12-20 07:58:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:58:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2023-12-20 07:58:03,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.193548387096774) internal successors, (130), 31 states have internal predecessors, (130), 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) [2023-12-20 07:58:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2023-12-20 07:58:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-20 07:58:03,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:58:03,619 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:58:03,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-20 07:58:03,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:58:03,824 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:58:03,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:58:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1562607528, now seen corresponding path program 7 times [2023-12-20 07:58:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:58:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757458230] [2023-12-20 07:58:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:58:03,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:58:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:58:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 16 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:58:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:58:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757458230] [2023-12-20 07:58:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757458230] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:58:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697910508] [2023-12-20 07:58:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:58:04,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:58:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:58:04,491 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:58:04,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 07:58:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:58:04,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 07:58:04,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:58:04,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:58:04,836 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 [2023-12-20 07:58:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:04,880 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 22 [2023-12-20 07:58:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:04,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:58:04,939 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 42 treesize of output 25 [2023-12-20 07:58:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:58:05,015 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 42 treesize of output 36 [2023-12-20 07:58:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:05,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:58:05,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 39 [2023-12-20 07:58:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:58:14,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:58:14,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 13 [2023-12-20 07:58:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 18 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:58:14,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:58:15,928 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 27 treesize of output 25 [2023-12-20 07:58:15,936 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 54 treesize of output 50 [2023-12-20 07:58:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 16 proven. 245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 07:58:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697910508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:58:16,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:58:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 22] total 64 [2023-12-20 07:58:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218410996] [2023-12-20 07:58:16,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:58:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-20 07:58:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:58:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-20 07:58:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3746, Unknown=3, NotChecked=0, Total=4032 [2023-12-20 07:58:16,104 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 64 states, 64 states have (on average 3.578125) internal successors, (229), 64 states have internal predecessors, (229), 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) [2023-12-20 07:58:27,850 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] [2023-12-20 07:58:31,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:35,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:37,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:41,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:45,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:49,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:58:54,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:04,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:08,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:15,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:19,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:24,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 07:59:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:59:26,420 INFO L93 Difference]: Finished difference Result 482 states and 519 transitions. [2023-12-20 07:59:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-12-20 07:59:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.578125) internal successors, (229), 64 states have internal predecessors, (229), 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 80 [2023-12-20 07:59:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:59:26,422 INFO L225 Difference]: With dead ends: 482 [2023-12-20 07:59:26,422 INFO L226 Difference]: Without dead ends: 468 [2023-12-20 07:59:26,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1755, Invalid=18536, Unknown=15, NotChecked=0, Total=20306 [2023-12-20 07:59:26,423 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 426 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 230 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 4409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:59:26,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1437 Invalid, 4409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 4156 Invalid, 23 Unknown, 0 Unchecked, 57.2s Time] [2023-12-20 07:59:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-12-20 07:59:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 228. [2023-12-20 07:59:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.1013215859030836) internal successors, (250), 227 states have internal predecessors, (250), 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) [2023-12-20 07:59:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 250 transitions. [2023-12-20 07:59:26,495 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 250 transitions. Word has length 80 [2023-12-20 07:59:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:59:26,495 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 250 transitions. [2023-12-20 07:59:26,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.578125) internal successors, (229), 64 states have internal predecessors, (229), 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) [2023-12-20 07:59:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 250 transitions. [2023-12-20 07:59:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 07:59:26,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:59:26,495 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:59:26,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 07:59:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:26,703 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:59:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:59:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 304032488, now seen corresponding path program 12 times [2023-12-20 07:59:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:59:26,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553825123] [2023-12-20 07:59:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:59:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:59:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:59:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 219 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:59:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553825123] [2023-12-20 07:59:27,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553825123] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:59:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691847652] [2023-12-20 07:59:27,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:59:27,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:27,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:59:27,273 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:59:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 07:59:27,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-20 07:59:27,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:59:27,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 07:59:27,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:59:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:28,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:59:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691847652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:59:28,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:59:28,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 61 [2023-12-20 07:59:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535676921] [2023-12-20 07:59:28,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:59:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-20 07:59:28,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:59:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-20 07:59:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=2826, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 07:59:28,529 INFO L87 Difference]: Start difference. First operand 228 states and 250 transitions. Second operand has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 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) [2023-12-20 07:59:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:59:29,019 INFO L93 Difference]: Finished difference Result 424 states and 461 transitions. [2023-12-20 07:59:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 07:59:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 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 82 [2023-12-20 07:59:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:59:29,027 INFO L225 Difference]: With dead ends: 424 [2023-12-20 07:59:29,028 INFO L226 Difference]: Without dead ends: 272 [2023-12-20 07:59:29,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1173, Invalid=3797, Unknown=0, NotChecked=0, Total=4970 [2023-12-20 07:59:29,034 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 327 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 07:59:29,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 286 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 07:59:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-12-20 07:59:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-12-20 07:59:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0936170212765957) internal successors, (257), 235 states have internal predecessors, (257), 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) [2023-12-20 07:59:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 257 transitions. [2023-12-20 07:59:29,094 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 257 transitions. Word has length 82 [2023-12-20 07:59:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:59:29,094 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 257 transitions. [2023-12-20 07:59:29,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 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) [2023-12-20 07:59:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 257 transitions. [2023-12-20 07:59:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 07:59:29,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:59:29,095 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:59:29,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 07:59:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-20 07:59:29,299 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:59:29,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:59:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1029421985, now seen corresponding path program 13 times [2023-12-20 07:59:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:59:29,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547089216] [2023-12-20 07:59:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:59:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:59:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:59:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:29,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:59:29,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547089216] [2023-12-20 07:59:29,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547089216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:59:29,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923464416] [2023-12-20 07:59:29,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:59:29,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:29,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:59:29,843 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:59:29,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 07:59:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:59:29,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-20 07:59:29,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:59:30,206 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 [2023-12-20 07:59:30,232 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 [2023-12-20 07:59:30,724 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 [2023-12-20 07:59:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:30,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:59:31,241 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 19 treesize of output 17 [2023-12-20 07:59:31,242 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 24 treesize of output 20 [2023-12-20 07:59:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:31,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923464416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:59:31,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:59:31,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 64 [2023-12-20 07:59:31,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014858014] [2023-12-20 07:59:31,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:59:31,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-20 07:59:31,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:59:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-20 07:59:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3803, Unknown=0, NotChecked=0, Total=4032 [2023-12-20 07:59:31,544 INFO L87 Difference]: Start difference. First operand 236 states and 257 transitions. Second operand has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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) [2023-12-20 07:59:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:59:40,226 INFO L93 Difference]: Finished difference Result 604 states and 651 transitions. [2023-12-20 07:59:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-12-20 07:59:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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 86 [2023-12-20 07:59:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:59:40,228 INFO L225 Difference]: With dead ends: 604 [2023-12-20 07:59:40,228 INFO L226 Difference]: Without dead ends: 595 [2023-12-20 07:59:40,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17934 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3853, Invalid=55439, Unknown=0, NotChecked=0, Total=59292 [2023-12-20 07:59:40,231 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 924 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 3955 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:59:40,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 972 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-20 07:59:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-12-20 07:59:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 295. [2023-12-20 07:59:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0850340136054422) internal successors, (319), 294 states have internal predecessors, (319), 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) [2023-12-20 07:59:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 319 transitions. [2023-12-20 07:59:40,314 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 319 transitions. Word has length 86 [2023-12-20 07:59:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:59:40,314 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 319 transitions. [2023-12-20 07:59:40,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 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) [2023-12-20 07:59:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 319 transitions. [2023-12-20 07:59:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 07:59:40,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:59:40,314 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 8, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:59:40,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-20 07:59:40,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-20 07:59:40,519 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:59:40,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:59:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -335996899, now seen corresponding path program 5 times [2023-12-20 07:59:40,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:59:40,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557338969] [2023-12-20 07:59:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:59:40,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:59:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:59:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 125 proven. 185 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 07:59:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:59:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557338969] [2023-12-20 07:59:41,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557338969] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:59:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158498091] [2023-12-20 07:59:41,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:59:41,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:59:41,114 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:59:41,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 07:59:41,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-20 07:59:41,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:59:41,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-20 07:59:41,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:59:41,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 07:59:41,491 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 [2023-12-20 07:59:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:42,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:59:42,525 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 [2023-12-20 07:59:42,527 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 [2023-12-20 07:59:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:42,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158498091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:59:42,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:59:42,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 64 [2023-12-20 07:59:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909575623] [2023-12-20 07:59:42,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:59:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-20 07:59:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:59:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-20 07:59:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3793, Unknown=0, NotChecked=0, Total=4032 [2023-12-20 07:59:42,709 INFO L87 Difference]: Start difference. First operand 295 states and 319 transitions. Second operand has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 states have internal predecessors, (244), 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) [2023-12-20 07:59:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:59:49,613 INFO L93 Difference]: Finished difference Result 571 states and 630 transitions. [2023-12-20 07:59:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-12-20 07:59:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 states have internal predecessors, (244), 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 86 [2023-12-20 07:59:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:59:49,615 INFO L225 Difference]: With dead ends: 571 [2023-12-20 07:59:49,615 INFO L226 Difference]: Without dead ends: 552 [2023-12-20 07:59:49,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18202 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4384, Invalid=52976, Unknown=0, NotChecked=0, Total=57360 [2023-12-20 07:59:49,617 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1172 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:59:49,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 512 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 07:59:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-12-20 07:59:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 403. [2023-12-20 07:59:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.0945273631840795) internal successors, (440), 402 states have internal predecessors, (440), 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) [2023-12-20 07:59:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 440 transitions. [2023-12-20 07:59:49,720 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 440 transitions. Word has length 86 [2023-12-20 07:59:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:59:49,720 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 440 transitions. [2023-12-20 07:59:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 states have internal predecessors, (244), 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) [2023-12-20 07:59:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 440 transitions. [2023-12-20 07:59:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 07:59:49,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:59:49,721 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:59:49,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-20 07:59:49,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:49,927 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:59:49,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:59:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash 330970149, now seen corresponding path program 14 times [2023-12-20 07:59:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:59:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442360689] [2023-12-20 07:59:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:59:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:59:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:59:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:59:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442360689] [2023-12-20 07:59:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442360689] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:59:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40644622] [2023-12-20 07:59:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:59:50,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:59:50,386 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 07:59:50,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 07:59:50,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:59:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:59:50,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-20 07:59:50,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:59:50,680 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 [2023-12-20 07:59:51,150 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 [2023-12-20 07:59:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:51,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:59:51,566 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 19 treesize of output 17 [2023-12-20 07:59:51,568 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 24 treesize of output 20 [2023-12-20 07:59:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 07:59:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40644622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:59:51,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:59:51,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 23] total 66 [2023-12-20 07:59:51,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308805680] [2023-12-20 07:59:51,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:59:51,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-20 07:59:51,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:59:51,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-20 07:59:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2023-12-20 07:59:51,826 INFO L87 Difference]: Start difference. First operand 403 states and 440 transitions. Second operand has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 states have internal predecessors, (263), 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) [2023-12-20 07:59:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:59:59,417 INFO L93 Difference]: Finished difference Result 723 states and 775 transitions. [2023-12-20 07:59:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-12-20 07:59:59,418 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 states have internal predecessors, (263), 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 91 [2023-12-20 07:59:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:59:59,419 INFO L225 Difference]: With dead ends: 723 [2023-12-20 07:59:59,419 INFO L226 Difference]: Without dead ends: 714 [2023-12-20 07:59:59,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12341 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3400, Invalid=41332, Unknown=0, NotChecked=0, Total=44732 [2023-12-20 07:59:59,422 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 916 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 4334 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 4334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:59:59,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1093 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 4334 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-20 07:59:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-12-20 07:59:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 408. [2023-12-20 07:59:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.0933660933660934) internal successors, (445), 407 states have internal predecessors, (445), 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) [2023-12-20 07:59:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 445 transitions. [2023-12-20 07:59:59,539 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 445 transitions. Word has length 91 [2023-12-20 07:59:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:59:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 445 transitions. [2023-12-20 07:59:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.984848484848485) internal successors, (263), 66 states have internal predecessors, (263), 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) [2023-12-20 07:59:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 445 transitions. [2023-12-20 07:59:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 07:59:59,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:59:59,540 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:59:59,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-20 07:59:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:59:59,746 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:59:59,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:59:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash 503415193, now seen corresponding path program 8 times [2023-12-20 07:59:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:59:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587018449] [2023-12-20 07:59:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:59:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:59:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:00:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:00:00,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:00:00,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587018449] [2023-12-20 08:00:00,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587018449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:00:00,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729343859] [2023-12-20 08:00:00,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:00:00,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:00:00,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:00:00,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:00:00,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 08:00:00,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:00:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:00:00,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-20 08:00:00,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:00:00,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:00:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:00:01,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:00:01,145 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 [2023-12-20 08:00:01,146 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 [2023-12-20 08:00:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:00:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729343859] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:00:01,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:00:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 46 [2023-12-20 08:00:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418608871] [2023-12-20 08:00:01,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:00:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-20 08:00:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:00:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-20 08:00:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 08:00:01,177 INFO L87 Difference]: Start difference. First operand 408 states and 445 transitions. Second operand has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 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) [2023-12-20 08:00:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:00:08,326 INFO L93 Difference]: Finished difference Result 852 states and 930 transitions. [2023-12-20 08:00:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2023-12-20 08:00:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 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 91 [2023-12-20 08:00:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:00:08,328 INFO L225 Difference]: With dead ends: 852 [2023-12-20 08:00:08,328 INFO L226 Difference]: Without dead ends: 850 [2023-12-20 08:00:08,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45482 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5330, Invalid=103240, Unknown=0, NotChecked=0, Total=108570 [2023-12-20 08:00:08,333 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 515 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 6393 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 6850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 6393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:00:08,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 865 Invalid, 6850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 6393 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 08:00:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-12-20 08:00:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 418. [2023-12-20 08:00:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0935251798561152) internal successors, (456), 417 states have internal predecessors, (456), 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) [2023-12-20 08:00:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 456 transitions. [2023-12-20 08:00:08,451 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 456 transitions. Word has length 91 [2023-12-20 08:00:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:00:08,452 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 456 transitions. [2023-12-20 08:00:08,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 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) [2023-12-20 08:00:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 456 transitions. [2023-12-20 08:00:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-20 08:00:08,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:00:08,452 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:00:08,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-20 08:00:08,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:00:08,659 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:00:08,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:00:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1205129370, now seen corresponding path program 15 times [2023-12-20 08:00:08,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:00:08,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567688165] [2023-12-20 08:00:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:00:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:00:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:00:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 30 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:00:09,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:00:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567688165] [2023-12-20 08:00:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567688165] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:00:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013210574] [2023-12-20 08:00:09,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:00:09,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:00:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:00:09,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:00:09,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 08:00:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-20 08:00:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:00:10,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 08:00:10,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:00:10,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 08:00:10,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 26 treesize of output 25 [2023-12-20 08:00:10,225 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-20 08:00:10,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2023-12-20 08:00:10,335 INFO L349 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2023-12-20 08:00:10,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 55 [2023-12-20 08:00:10,444 INFO L349 Elim1Store]: treesize reduction 55, result has 28.6 percent of original size [2023-12-20 08:00:10,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 70 [2023-12-20 08:00:10,617 INFO L349 Elim1Store]: treesize reduction 74, result has 25.3 percent of original size [2023-12-20 08:00:10,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 74 treesize of output 85 [2023-12-20 08:00:10,743 INFO L349 Elim1Store]: treesize reduction 108, result has 23.9 percent of original size [2023-12-20 08:00:10,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 86 treesize of output 100 [2023-12-20 08:00:10,986 INFO L349 Elim1Store]: treesize reduction 135, result has 21.5 percent of original size [2023-12-20 08:00:10,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 113 treesize of output 112 [2023-12-20 08:00:11,176 INFO L349 Elim1Store]: treesize reduction 177, result has 20.6 percent of original size [2023-12-20 08:00:11,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 149 treesize of output 127 [2023-12-20 08:00:13,843 INFO L349 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2023-12-20 08:00:13,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 154 treesize of output 28 [2023-12-20 08:00:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:00:13,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:00:15,058 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 27 treesize of output 25 [2023-12-20 08:00:15,060 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 27 treesize of output 23 [2023-12-20 08:00:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 18 proven. 327 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 08:00:15,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013210574] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:00:15,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:00:15,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 21] total 68 [2023-12-20 08:00:15,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883496279] [2023-12-20 08:00:15,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:00:15,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-20 08:00:15,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:00:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-20 08:00:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=4254, Unknown=0, NotChecked=0, Total=4556 [2023-12-20 08:00:15,079 INFO L87 Difference]: Start difference. First operand 418 states and 456 transitions. Second operand has 68 states, 68 states have (on average 3.4705882352941178) internal successors, (236), 68 states have internal predecessors, (236), 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) [2023-12-20 08:00:18,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:19,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:24,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:28,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:32,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:36,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:40,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:44,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:49,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:53,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:00:57,432 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] [2023-12-20 08:01:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:08,186 INFO L93 Difference]: Finished difference Result 547 states and 588 transitions. [2023-12-20 08:01:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-20 08:01:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.4705882352941178) internal successors, (236), 68 states have internal predecessors, (236), 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 93 [2023-12-20 08:01:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:08,188 INFO L225 Difference]: With dead ends: 547 [2023-12-20 08:01:08,188 INFO L226 Difference]: Without dead ends: 528 [2023-12-20 08:01:08,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 135 SyntacticMatches, 16 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7203 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1607, Invalid=20442, Unknown=3, NotChecked=0, Total=22052 [2023-12-20 08:01:08,189 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 406 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 3715 mSolverCounterSat, 178 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 3715 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:08,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1322 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 3715 Invalid, 17 Unknown, 0 Unchecked, 43.3s Time] [2023-12-20 08:01:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-12-20 08:01:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 356. [2023-12-20 08:01:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.095774647887324) internal successors, (389), 355 states have internal predecessors, (389), 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) [2023-12-20 08:01:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 389 transitions. [2023-12-20 08:01:08,294 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 389 transitions. Word has length 93 [2023-12-20 08:01:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:08,294 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 389 transitions. [2023-12-20 08:01:08,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.4705882352941178) internal successors, (236), 68 states have internal predecessors, (236), 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) [2023-12-20 08:01:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 389 transitions. [2023-12-20 08:01:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 08:01:08,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:08,295 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:08,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-20 08:01:08,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 08:01:08,514 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:08,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash 786853409, now seen corresponding path program 16 times [2023-12-20 08:01:08,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:08,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292937798] [2023-12-20 08:01:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 322 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:09,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292937798] [2023-12-20 08:01:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292937798] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868618677] [2023-12-20 08:01:09,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:01:09,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:09,220 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:01:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 08:01:09,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:01:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:09,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-20 08:01:09,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 378 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:10,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 378 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:10,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868618677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:10,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2023-12-20 08:01:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598441735] [2023-12-20 08:01:10,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:10,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-20 08:01:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-20 08:01:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=3732, Unknown=0, NotChecked=0, Total=4692 [2023-12-20 08:01:10,756 INFO L87 Difference]: Start difference. First operand 356 states and 389 transitions. Second operand has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 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) [2023-12-20 08:01:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:11,604 INFO L93 Difference]: Finished difference Result 552 states and 599 transitions. [2023-12-20 08:01:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 08:01:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 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 96 [2023-12-20 08:01:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:11,605 INFO L225 Difference]: With dead ends: 552 [2023-12-20 08:01:11,605 INFO L226 Difference]: Without dead ends: 370 [2023-12-20 08:01:11,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1820, Invalid=6736, Unknown=0, NotChecked=0, Total=8556 [2023-12-20 08:01:11,606 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 408 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:11,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 367 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:01:11,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-12-20 08:01:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 364. [2023-12-20 08:01:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.0909090909090908) internal successors, (396), 363 states have internal predecessors, (396), 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) [2023-12-20 08:01:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 396 transitions. [2023-12-20 08:01:11,700 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 396 transitions. Word has length 96 [2023-12-20 08:01:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:11,700 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 396 transitions. [2023-12-20 08:01:11,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 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) [2023-12-20 08:01:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 396 transitions. [2023-12-20 08:01:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-20 08:01:11,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:11,701 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:11,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-20 08:01:11,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-20 08:01:11,917 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:11,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1551288090, now seen corresponding path program 17 times [2023-12-20 08:01:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719598887] [2023-12-20 08:01:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 24 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719598887] [2023-12-20 08:01:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719598887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859362825] [2023-12-20 08:01:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:01:12,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:12,639 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:01:12,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 08:01:12,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-20 08:01:12,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:12,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 08:01:12,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:13,232 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 [2023-12-20 08:01:13,259 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 [2023-12-20 08:01:14,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:14,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2023-12-20 08:01:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 24 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:14,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:14,634 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 19 treesize of output 17 [2023-12-20 08:01:14,635 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 24 treesize of output 20 [2023-12-20 08:01:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 24 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859362825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:14,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:14,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 75 [2023-12-20 08:01:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544300629] [2023-12-20 08:01:14,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-20 08:01:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-20 08:01:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=5231, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 08:01:14,983 INFO L87 Difference]: Start difference. First operand 364 states and 396 transitions. Second operand has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 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) [2023-12-20 08:01:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:28,047 INFO L93 Difference]: Finished difference Result 794 states and 850 transitions. [2023-12-20 08:01:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-12-20 08:01:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 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 100 [2023-12-20 08:01:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:28,049 INFO L225 Difference]: With dead ends: 794 [2023-12-20 08:01:28,049 INFO L226 Difference]: Without dead ends: 785 [2023-12-20 08:01:28,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23752 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5311, Invalid=68945, Unknown=0, NotChecked=0, Total=74256 [2023-12-20 08:01:28,051 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 863 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 4856 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 5438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 4856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:28,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1231 Invalid, 5438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 4856 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 08:01:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2023-12-20 08:01:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 379. [2023-12-20 08:01:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.08994708994709) internal successors, (412), 378 states have internal predecessors, (412), 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) [2023-12-20 08:01:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 412 transitions. [2023-12-20 08:01:28,168 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 412 transitions. Word has length 100 [2023-12-20 08:01:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:28,169 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 412 transitions. [2023-12-20 08:01:28,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.88) internal successors, (291), 75 states have internal predecessors, (291), 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) [2023-12-20 08:01:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 412 transitions. [2023-12-20 08:01:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-20 08:01:28,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:28,169 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:28,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-20 08:01:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-20 08:01:28,375 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:28,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1906174378, now seen corresponding path program 6 times [2023-12-20 08:01:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240186029] [2023-12-20 08:01:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240186029] [2023-12-20 08:01:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240186029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978701549] [2023-12-20 08:01:29,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:01:29,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:29,050 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:01:29,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 08:01:29,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-12-20 08:01:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:29,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-20 08:01:29,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:30,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 08:01:30,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 13 [2023-12-20 08:01:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:30,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:01:30,856 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 [2023-12-20 08:01:30,858 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 [2023-12-20 08:01:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978701549] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:01:30,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:01:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 61 [2023-12-20 08:01:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301248356] [2023-12-20 08:01:30,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:01:30,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-20 08:01:30,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:01:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-20 08:01:30,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 08:01:30,882 INFO L87 Difference]: Start difference. First operand 379 states and 412 transitions. Second operand has 61 states, 61 states have (on average 4.311475409836065) internal successors, (263), 61 states have internal predecessors, (263), 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) [2023-12-20 08:01:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:01:38,568 INFO L93 Difference]: Finished difference Result 722 states and 787 transitions. [2023-12-20 08:01:38,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2023-12-20 08:01:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.311475409836065) internal successors, (263), 61 states have internal predecessors, (263), 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 100 [2023-12-20 08:01:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:01:38,570 INFO L225 Difference]: With dead ends: 722 [2023-12-20 08:01:38,570 INFO L226 Difference]: Without dead ends: 720 [2023-12-20 08:01:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31544 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4548, Invalid=79842, Unknown=0, NotChecked=0, Total=84390 [2023-12-20 08:01:38,574 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 562 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 5623 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 6157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 5623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:01:38,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 798 Invalid, 6157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 5623 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-20 08:01:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-12-20 08:01:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 384. [2023-12-20 08:01:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.0913838120104438) internal successors, (418), 383 states have internal predecessors, (418), 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) [2023-12-20 08:01:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 418 transitions. [2023-12-20 08:01:38,709 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 418 transitions. Word has length 100 [2023-12-20 08:01:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:01:38,709 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 418 transitions. [2023-12-20 08:01:38,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.311475409836065) internal successors, (263), 61 states have internal predecessors, (263), 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) [2023-12-20 08:01:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 418 transitions. [2023-12-20 08:01:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-20 08:01:38,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:01:38,710 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:01:38,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-20 08:01:38,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-20 08:01:38,911 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:01:38,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:01:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1366093570, now seen corresponding path program 9 times [2023-12-20 08:01:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:01:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918601430] [2023-12-20 08:01:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:01:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:01:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:01:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:01:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:01:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918601430] [2023-12-20 08:01:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918601430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:01:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290251515] [2023-12-20 08:01:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:01:39,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:01:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:01:39,392 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:01:39,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 08:01:39,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 08:01:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:01:39,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 08:01:39,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:01:39,698 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 [2023-12-20 08:01:39,744 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 22 [2023-12-20 08:01:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:39,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:39,775 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 42 treesize of output 25 [2023-12-20 08:01:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:39,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:39,832 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 34 treesize of output 36 [2023-12-20 08:01:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:39,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:39,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2023-12-20 08:01:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:40,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-12-20 08:01:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:40,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:40,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 53 [2023-12-20 08:01:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:41,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2023-12-20 08:01:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:41,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:41,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 67 [2023-12-20 08:01:48,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:48,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:48,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 78 [2023-12-20 08:01:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:01:53,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:01:53,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 81 [2023-12-20 08:02:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:07,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:07,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 89 [2023-12-20 08:02:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:16,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:16,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 92 [2023-12-20 08:02:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:02:18,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:02:18,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 22 [2023-12-20 08:02:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 136 proven. 43 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-12-20 08:02:18,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:22,915 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 35 treesize of output 33 [2023-12-20 08:04:22,918 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 238 treesize of output 230 [2023-12-20 08:04:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 91 proven. 48 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2023-12-20 08:04:23,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290251515] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:23,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:23,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 12] total 55 [2023-12-20 08:04:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384894181] [2023-12-20 08:04:23,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:23,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-20 08:04:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-20 08:04:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2695, Unknown=25, NotChecked=0, Total=2970 [2023-12-20 08:04:23,040 INFO L87 Difference]: Start difference. First operand 384 states and 418 transitions. Second operand has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 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) [2023-12-20 08:04:29,396 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] [2023-12-20 08:04:30,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:32,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:34,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:36,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:38,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:43,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:45,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:50,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:04:52,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:14,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:41,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:05:49,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-20 08:05:50,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:05:52,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:05:54,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:05:56,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:05:57,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-12-20 08:05:59,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:06:02,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:06,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:08,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:06:13,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:18,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:06:22,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-20 08:06:26,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:30,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:06:37,710 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-20 08:06:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-20 08:06:37,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 169 SyntacticMatches, 14 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2969 ImplicationChecksByTransitivity, 209.7s TimeCoverageRelationStatistics Valid=1235, Invalid=9634, Unknown=51, NotChecked=0, Total=10920 [2023-12-20 08:06:37,711 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 150 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 268 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:06:37,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 92 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2774 Invalid, 32 Unknown, 0 Unchecked, 79.7s Time] [2023-12-20 08:06:37,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-20 08:06:37,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-20 08:06:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-20 08:06:37,913 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:247) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 47 more [2023-12-20 08:06:37,917 INFO L158 Benchmark]: Toolchain (without parser) took 774836.71ms. Allocated memory was 239.1MB in the beginning and 596.6MB in the end (delta: 357.6MB). Free memory was 190.4MB in the beginning and 468.6MB in the end (delta: -278.2MB). Peak memory consumption was 80.4MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 155.2MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.07ms. Allocated memory is still 239.1MB. Free memory was 190.4MB in the beginning and 178.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.55ms. Allocated memory is still 239.1MB. Free memory was 178.9MB in the beginning and 177.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: Boogie Preprocessor took 30.63ms. Allocated memory is still 239.1MB. Free memory was 177.4MB in the beginning and 175.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: RCFGBuilder took 250.95ms. Allocated memory is still 239.1MB. Free memory was 175.3MB in the beginning and 162.1MB in the end (delta: 13.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L158 Benchmark]: TraceAbstraction took 774354.11ms. Allocated memory was 239.1MB in the beginning and 596.6MB in the end (delta: 357.6MB). Free memory was 161.7MB in the beginning and 468.6MB in the end (delta: -306.9MB). Peak memory consumption was 52.1MB. Max. memory is 8.0GB. [2023-12-20 08:06:37,917 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 155.2MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 173.07ms. Allocated memory is still 239.1MB. Free memory was 190.4MB in the beginning and 178.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.55ms. Allocated memory is still 239.1MB. Free memory was 178.9MB in the beginning and 177.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.63ms. Allocated memory is still 239.1MB. Free memory was 177.4MB in the beginning and 175.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 250.95ms. Allocated memory is still 239.1MB. Free memory was 175.3MB in the beginning and 162.1MB in the end (delta: 13.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 774354.11ms. Allocated memory was 239.1MB in the beginning and 596.6MB in the end (delta: 357.6MB). Free memory was 161.7MB in the beginning and 468.6MB in the end (delta: -306.9MB). Peak memory consumption was 52.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...