/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/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:03:08,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:03:08,515 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 08:03:08,520 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:03:08,521 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:03:08,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:03:08,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:03:08,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:03:08,549 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:03:08,552 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:03:08,553 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:03:08,553 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:03:08,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:03:08,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:03:08,555 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:03:08,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:03:08,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:03:08,556 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:03:08,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:03:08,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:03:08,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:03:08,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:03:08,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:03:08,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:03:08,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:03:08,558 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:03:08,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:03:08,558 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:03:08,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:03:08,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:03:08,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:03:08,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:03:08,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:03:08,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:03:08,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:03:08,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:03:08,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:03:08,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:03:08,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:03:08,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:03:08,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:03:08,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:03:08,790 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:03:08,791 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:03:08,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skipped.c [2023-12-20 08:03:09,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:03:10,099 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:03:10,100 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skipped.c [2023-12-20 08:03:10,106 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b186c96/da78a92f133e4fb5a54ce6005ae6dc9a/FLAG318353218 [2023-12-20 08:03:10,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b186c96/da78a92f133e4fb5a54ce6005ae6dc9a [2023-12-20 08:03:10,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:03:10,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:03:10,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:03:10,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:03:10,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:03:10,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354377d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10, skipping insertion in model container [2023-12-20 08:03:10,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,144 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:03:10,276 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/skipped.c[398,411] [2023-12-20 08:03:10,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:03:10,308 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:03:10,318 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/skipped.c[398,411] [2023-12-20 08:03:10,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:03:10,347 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:03:10,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10 WrapperNode [2023-12-20 08:03:10,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:03:10,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:03:10,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:03:10,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:03:10,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,377 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-12-20 08:03:10,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:03:10,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:03:10,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:03:10,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:03:10,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,389 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,403 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-12-20 08:03:10,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:03:10,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:03:10,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:03:10,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:03:10,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (1/1) ... [2023-12-20 08:03:10,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:03:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:10,446 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 08:03:10,451 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 08:03:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:03:10,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:03:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:03:10,522 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:03:10,524 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:03:10,676 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:03:10,700 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:03:10,701 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 08:03:10,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:03:10 BoogieIcfgContainer [2023-12-20 08:03:10,701 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:03:10,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:03:10,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:03:10,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:03:10,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:03:10" (1/3) ... [2023-12-20 08:03:10,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a44beba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:03:10, skipping insertion in model container [2023-12-20 08:03:10,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:03:10" (2/3) ... [2023-12-20 08:03:10,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a44beba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:03:10, skipping insertion in model container [2023-12-20 08:03:10,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:03:10" (3/3) ... [2023-12-20 08:03:10,711 INFO L112 eAbstractionObserver]: Analyzing ICFG skipped.c [2023-12-20 08:03:10,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:03:10,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:03:10,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:03:10,773 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;@68dc8542, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:03:10,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:03:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 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 08:03:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 08:03:10,783 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:10,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:10,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:10,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1393723895, now seen corresponding path program 1 times [2023-12-20 08:03:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:10,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264469865] [2023-12-20 08:03:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:10,949 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 08:03:10,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:10,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264469865] [2023-12-20 08:03:10,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264469865] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:03:10,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:03:10,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 08:03:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698817385] [2023-12-20 08:03:10,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:03:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:03:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:03:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:03:10,996 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 08:03:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:11,046 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2023-12-20 08:03:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:03:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-20 08:03:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:11,061 INFO L225 Difference]: With dead ends: 39 [2023-12-20 08:03:11,061 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 08:03:11,063 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 08:03:11,066 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:11,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:03:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 08:03:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-20 08:03:11,092 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 08:03:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-20 08:03:11,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-12-20 08:03:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:11,095 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-20 08:03:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 08:03:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-20 08:03:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 08:03:11,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:11,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 08:03:11,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1128556147, now seen corresponding path program 1 times [2023-12-20 08:03:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:11,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560980790] [2023-12-20 08:03:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:11,264 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 08:03:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:11,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560980790] [2023-12-20 08:03:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560980790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:03:11,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:03:11,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 08:03:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240160909] [2023-12-20 08:03:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:03:11,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:03:11,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:03:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:03:11,270 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 08:03:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:11,317 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-20 08:03:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:03:11,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-20 08:03:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:11,318 INFO L225 Difference]: With dead ends: 32 [2023-12-20 08:03:11,318 INFO L226 Difference]: Without dead ends: 18 [2023-12-20 08:03:11,319 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 08:03:11,320 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:03:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-20 08:03:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-20 08:03:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:03:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-20 08:03:11,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2023-12-20 08:03:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-20 08:03:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 08:03:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-20 08:03:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 08:03:11,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:11,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:11,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 08:03:11,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:11,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash 209297074, now seen corresponding path program 1 times [2023-12-20 08:03:11,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235437489] [2023-12-20 08:03:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:11,434 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 08:03:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235437489] [2023-12-20 08:03:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235437489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81718024] [2023-12-20 08:03:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:11,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:11,442 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 08:03:11,451 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 08:03:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:11,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:03:11,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:11,590 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 08:03:11,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:11,621 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 08:03:11,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81718024] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:11,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:11,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-20 08:03:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919466869] [2023-12-20 08:03:11,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:11,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:03:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:03:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:03:11,633 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:03:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:11,670 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-12-20 08:03:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 08:03:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:03:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:11,671 INFO L225 Difference]: With dead ends: 33 [2023-12-20 08:03:11,671 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 08:03:11,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:03:11,672 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:11,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:03:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 08:03:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-20 08:03:11,675 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 08:03:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 08:03:11,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-12-20 08:03:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 08:03:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:03:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 08:03:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-20 08:03:11,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:11,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:11,688 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 08:03:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:11,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1777036883, now seen corresponding path program 2 times [2023-12-20 08:03:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:11,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379991874] [2023-12-20 08:03:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:12,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379991874] [2023-12-20 08:03:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379991874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:03:12,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:03:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 08:03:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962788368] [2023-12-20 08:03:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:03:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 08:03:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 08:03:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-20 08:03:12,197 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 08:03:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:12,247 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2023-12-20 08:03:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 08:03:12,247 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 13 [2023-12-20 08:03:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:12,249 INFO L225 Difference]: With dead ends: 30 [2023-12-20 08:03:12,249 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 08:03:12,249 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 08:03:12,255 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:12,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 11 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:03:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 08:03:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-12-20 08:03:12,264 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 08:03:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 08:03:12,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2023-12-20 08:03:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:12,267 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 08:03:12,267 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 08:03:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 08:03:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 08:03:12,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:12,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 08:03:12,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:12,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -830304933, now seen corresponding path program 1 times [2023-12-20 08:03:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:12,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012683752] [2023-12-20 08:03:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012683752] [2023-12-20 08:03:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012683752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:12,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881558206] [2023-12-20 08:03:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:12,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:12,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:12,681 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 08:03:12,691 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 08:03:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:12,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-20 08:03:12,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:12,863 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 08:03:12,880 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 11 [2023-12-20 08:03:12,914 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 08:03:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:12,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:12,978 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 08:03:12,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-20 08:03:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:12,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881558206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:12,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:12,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 14 [2023-12-20 08:03:12,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478022121] [2023-12-20 08:03:12,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:12,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:03:12,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:03:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:03:13,001 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 08:03:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:13,216 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2023-12-20 08:03:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:03:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 18 [2023-12-20 08:03:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:13,217 INFO L225 Difference]: With dead ends: 50 [2023-12-20 08:03:13,217 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 08:03:13,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:03:13,218 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:13,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 41 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 08:03:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2023-12-20 08:03:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 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 08:03:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-12-20 08:03:13,224 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2023-12-20 08:03:13,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:13,224 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-12-20 08:03:13,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 08:03:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-12-20 08:03:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 08:03:13,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:13,225 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:13,235 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 08:03:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:13,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:13,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash -150246563, now seen corresponding path program 1 times [2023-12-20 08:03:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020868087] [2023-12-20 08:03:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:13,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020868087] [2023-12-20 08:03:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020868087] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069022328] [2023-12-20 08:03:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:13,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:13,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:13,635 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 08:03:13,661 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 08:03:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:13,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:03:13,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:13,806 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 08:03:13,841 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 08:03:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:13,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:13,933 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:13,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2023-12-20 08:03:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069022328] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:13,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:13,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 17 [2023-12-20 08:03:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013193929] [2023-12-20 08:03:13,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:03:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:03:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:03:13,946 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 08:03:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:14,144 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-12-20 08:03:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 08:03:14,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 18 [2023-12-20 08:03:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:14,146 INFO L225 Difference]: With dead ends: 47 [2023-12-20 08:03:14,146 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 08:03:14,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2023-12-20 08:03:14,147 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:14,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 28 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 08:03:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2023-12-20 08:03:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:03:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-20 08:03:14,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2023-12-20 08:03:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:14,151 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-20 08:03:14,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 08:03:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-20 08:03:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-20 08:03:14,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:14,152 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 08:03:14,160 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 08:03:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:14,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:14,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash -892354055, now seen corresponding path program 1 times [2023-12-20 08:03:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:14,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602876237] [2023-12-20 08:03:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602876237] [2023-12-20 08:03:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602876237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385398863] [2023-12-20 08:03:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:14,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:14,587 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 08:03:14,608 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 08:03:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:14,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:03:14,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:14,696 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 08:03:14,769 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 08:03:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:14,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:14,825 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 08:03:14,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:14,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385398863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:14,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:14,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-12-20 08:03:14,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516944146] [2023-12-20 08:03:14,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:14,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:03:14,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:03:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:03:14,847 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 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 08:03:15,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:15,040 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-12-20 08:03:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:03:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 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 08:03:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:15,041 INFO L225 Difference]: With dead ends: 52 [2023-12-20 08:03:15,041 INFO L226 Difference]: Without dead ends: 50 [2023-12-20 08:03:15,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:03:15,042 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:15,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 81 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:15,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-20 08:03:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2023-12-20 08:03:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 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 08:03:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-12-20 08:03:15,048 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 21 [2023-12-20 08:03:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:15,049 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-12-20 08:03:15,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 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 08:03:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-12-20 08:03:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-20 08:03:15,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:15,049 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 08:03:15,056 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 08:03:15,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:15,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:15,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1285381065, now seen corresponding path program 1 times [2023-12-20 08:03:15,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:15,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228498238] [2023-12-20 08:03:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228498238] [2023-12-20 08:03:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228498238] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542719335] [2023-12-20 08:03:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:15,525 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 08:03:15,548 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 08:03:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:15,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:03:15,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:15,769 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 08:03:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:15,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:15,853 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:15,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:03:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:15,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542719335] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:15,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:15,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 8] total 22 [2023-12-20 08:03:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106074373] [2023-12-20 08:03:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 08:03:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 08:03:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-20 08:03:15,860 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 08:03:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:16,122 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-12-20 08:03:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 08:03:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) Word has length 21 [2023-12-20 08:03:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:16,123 INFO L225 Difference]: With dead ends: 44 [2023-12-20 08:03:16,123 INFO L226 Difference]: Without dead ends: 42 [2023-12-20 08:03:16,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:03:16,125 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:16,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-20 08:03:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2023-12-20 08:03:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-20 08:03:16,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2023-12-20 08:03:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:16,133 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-20 08:03:16,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 08:03:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-20 08:03:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 08:03:16,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:16,134 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:16,145 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 08:03:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:16,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:16,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1733157019, now seen corresponding path program 2 times [2023-12-20 08:03:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433082143] [2023-12-20 08:03:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:16,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433082143] [2023-12-20 08:03:16,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433082143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669218225] [2023-12-20 08:03:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:16,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:16,433 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 08:03:16,452 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 08:03:16,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:16,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:03:16,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:16,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:16,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669218225] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:16,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 08:03:16,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216298722] [2023-12-20 08:03:16,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:16,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:03:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:03:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:03:16,619 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 08:03:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:16,750 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-12-20 08:03:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:03:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-20 08:03:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:16,751 INFO L225 Difference]: With dead ends: 75 [2023-12-20 08:03:16,751 INFO L226 Difference]: Without dead ends: 42 [2023-12-20 08:03:16,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:03:16,753 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:16,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 36 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-20 08:03:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2023-12-20 08:03:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-12-20 08:03:16,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 24 [2023-12-20 08:03:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:16,758 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-12-20 08:03:16,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 08:03:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-12-20 08:03:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 08:03:16,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:16,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:16,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 08:03:16,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:16,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 367543996, now seen corresponding path program 3 times [2023-12-20 08:03:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862479218] [2023-12-20 08:03:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 08:03:17,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862479218] [2023-12-20 08:03:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862479218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501333313] [2023-12-20 08:03:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:03:17,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:17,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:17,177 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 08:03:17,180 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 08:03:17,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 08:03:17,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:17,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:03:17,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:17,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:03:17,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501333313] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:17,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:17,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 25 [2023-12-20 08:03:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553577204] [2023-12-20 08:03:17,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:17,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 08:03:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 08:03:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-12-20 08:03:17,584 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:03:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:17,936 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-12-20 08:03:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:03:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:03:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:17,937 INFO L225 Difference]: With dead ends: 53 [2023-12-20 08:03:17,937 INFO L226 Difference]: Without dead ends: 42 [2023-12-20 08:03:17,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:03:17,938 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 235 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:17,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 61 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:03:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-20 08:03:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2023-12-20 08:03:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 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 08:03:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-20 08:03:17,943 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2023-12-20 08:03:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:17,943 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-20 08:03:17,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:03:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-20 08:03:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 08:03:17,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:17,944 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 08:03:17,952 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 08:03:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:18,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:18,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:18,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1999622930, now seen corresponding path program 4 times [2023-12-20 08:03:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981483458] [2023-12-20 08:03:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 08:03:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981483458] [2023-12-20 08:03:18,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981483458] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406416635] [2023-12-20 08:03:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:03:18,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:18,453 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 08:03:18,476 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 08:03:18,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:03:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:18,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:03:18,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:18,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:03:18,575 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 08:03:18,655 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 7 [2023-12-20 08:03:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:03:18,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:18,785 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 08:03:18,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:03:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406416635] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:18,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:18,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2023-12-20 08:03:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18153258] [2023-12-20 08:03:18,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 08:03:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 08:03:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-12-20 08:03:18,808 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 08:03:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:19,477 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2023-12-20 08:03:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-20 08:03:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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) Word has length 30 [2023-12-20 08:03:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:19,478 INFO L225 Difference]: With dead ends: 134 [2023-12-20 08:03:19,478 INFO L226 Difference]: Without dead ends: 108 [2023-12-20 08:03:19,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 08:03:19,480 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 191 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:19,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 113 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:03:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-20 08:03:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2023-12-20 08:03:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:03:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-12-20 08:03:19,488 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2023-12-20 08:03:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:19,488 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-12-20 08:03:19,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 08:03:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-12-20 08:03:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 08:03:19,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:19,489 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:19,497 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 08:03:19,695 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,SelfDestructingSolverStorable10 [2023-12-20 08:03:19,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:19,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:19,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1958072075, now seen corresponding path program 1 times [2023-12-20 08:03:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108089390] [2023-12-20 08:03:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:19,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108089390] [2023-12-20 08:03:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108089390] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006996676] [2023-12-20 08:03:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:20,497 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 08:03:20,521 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 08:03:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:20,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 08:03:20,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:20,820 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 08:03:20,923 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 08:03:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:20,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:21,164 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:21,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:03:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:03:21,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006996676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:21,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:21,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 10] total 39 [2023-12-20 08:03:21,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100009204] [2023-12-20 08:03:21,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:21,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-20 08:03:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-20 08:03:21,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 08:03:21,228 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 08:03:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:22,970 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2023-12-20 08:03:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-20 08:03:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-20 08:03:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:22,971 INFO L225 Difference]: With dead ends: 207 [2023-12-20 08:03:22,971 INFO L226 Difference]: Without dead ends: 182 [2023-12-20 08:03:22,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1185, Invalid=6297, Unknown=0, NotChecked=0, Total=7482 [2023-12-20 08:03:22,974 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 452 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:22,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 111 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:03:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-20 08:03:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 51. [2023-12-20 08:03:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 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 08:03:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-12-20 08:03:22,984 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2023-12-20 08:03:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:22,984 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-12-20 08:03:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 08:03:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-12-20 08:03:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 08:03:22,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:22,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:22,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 08:03:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:23,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:23,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash -974947359, now seen corresponding path program 5 times [2023-12-20 08:03:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563638021] [2023-12-20 08:03:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:23,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563638021] [2023-12-20 08:03:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563638021] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306056541] [2023-12-20 08:03:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:03:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:23,903 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 08:03:23,904 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 08:03:23,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 08:03:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:23,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:03:23,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:24,057 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 15 treesize of output 1 [2023-12-20 08:03:24,113 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 08:03:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:03:24,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:24,233 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 08:03:24,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:03:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306056541] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:24,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 10] total 28 [2023-12-20 08:03:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921596582] [2023-12-20 08:03:24,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 08:03:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 08:03:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-12-20 08:03:24,276 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 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 08:03:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:26,227 INFO L93 Difference]: Finished difference Result 257 states and 308 transitions. [2023-12-20 08:03:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-20 08:03:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 08:03:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:26,230 INFO L225 Difference]: With dead ends: 257 [2023-12-20 08:03:26,230 INFO L226 Difference]: Without dead ends: 238 [2023-12-20 08:03:26,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1473, Invalid=8427, Unknown=0, NotChecked=0, Total=9900 [2023-12-20 08:03:26,234 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 502 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:26,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 152 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:03:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-20 08:03:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 67. [2023-12-20 08:03:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 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 08:03:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-12-20 08:03:26,262 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 34 [2023-12-20 08:03:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:26,262 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-12-20 08:03:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 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 08:03:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-12-20 08:03:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 08:03:26,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:26,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:26,269 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 08:03:26,468 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,SelfDestructingSolverStorable12 [2023-12-20 08:03:26,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:26,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1996015713, now seen corresponding path program 1 times [2023-12-20 08:03:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380058224] [2023-12-20 08:03:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380058224] [2023-12-20 08:03:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380058224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102680871] [2023-12-20 08:03:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:27,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:27,160 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 08:03:27,161 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 08:03:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:27,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 08:03:27,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:27,462 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 08:03:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:27,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:27,607 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:27,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:03:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:03:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102680871] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:27,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 11] total 36 [2023-12-20 08:03:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187244875] [2023-12-20 08:03:27,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:27,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-20 08:03:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-20 08:03:27,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:03:27,649 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 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 08:03:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:29,186 INFO L93 Difference]: Finished difference Result 252 states and 314 transitions. [2023-12-20 08:03:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-20 08:03:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-20 08:03:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:29,187 INFO L225 Difference]: With dead ends: 252 [2023-12-20 08:03:29,187 INFO L226 Difference]: Without dead ends: 233 [2023-12-20 08:03:29,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2390 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1344, Invalid=7212, Unknown=0, NotChecked=0, Total=8556 [2023-12-20 08:03:29,189 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 541 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:29,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 98 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:03:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-12-20 08:03:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 53. [2023-12-20 08:03:29,201 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 08:03:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-12-20 08:03:29,201 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 34 [2023-12-20 08:03:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:29,201 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-12-20 08:03:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 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 08:03:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-12-20 08:03:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 08:03:29,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:29,202 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:29,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-20 08:03:29,404 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,SelfDestructingSolverStorable13 [2023-12-20 08:03:29,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:29,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2082669133, now seen corresponding path program 6 times [2023-12-20 08:03:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:29,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501307039] [2023-12-20 08:03:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 08:03:29,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501307039] [2023-12-20 08:03:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501307039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961992262] [2023-12-20 08:03:29,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:03:29,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:29,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:29,553 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 08:03:29,557 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 08:03:29,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 08:03:29,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:29,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:03:29,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 08:03:29,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 08:03:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961992262] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:29,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 08:03:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349889684] [2023-12-20 08:03:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 08:03:29,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 08:03:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:03:29,882 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:03:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:30,059 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2023-12-20 08:03:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 08:03:30,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2023-12-20 08:03:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:30,059 INFO L225 Difference]: With dead ends: 94 [2023-12-20 08:03:30,059 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 08:03:30,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2023-12-20 08:03:30,060 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 168 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:30,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 49 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:03:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 08:03:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2023-12-20 08:03:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-12-20 08:03:30,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 37 [2023-12-20 08:03:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:30,068 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-12-20 08:03:30,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:03:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-12-20 08:03:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 08:03:30,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:30,068 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:30,074 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 08:03:30,272 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,SelfDestructingSolverStorable14 [2023-12-20 08:03:30,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:30,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1534022962, now seen corresponding path program 7 times [2023-12-20 08:03:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098866273] [2023-12-20 08:03:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098866273] [2023-12-20 08:03:30,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098866273] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:30,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710957953] [2023-12-20 08:03:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:03:30,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:30,560 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 08:03:30,561 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 08:03:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:30,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:03:30,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:30,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710957953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:31,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-12-20 08:03:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454877047] [2023-12-20 08:03:31,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 08:03:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 08:03:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:03:31,242 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 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 08:03:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:31,536 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-12-20 08:03:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:03:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 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 38 [2023-12-20 08:03:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:31,536 INFO L225 Difference]: With dead ends: 66 [2023-12-20 08:03:31,536 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 08:03:31,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 08:03:31,537 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 241 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:31,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 54 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:03:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 08:03:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2023-12-20 08:03:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:03:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-12-20 08:03:31,553 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2023-12-20 08:03:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:31,553 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-12-20 08:03:31,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 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 08:03:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-12-20 08:03:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 08:03:31,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:31,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:31,566 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 08:03:31,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 08:03:31,762 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:31,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2100411684, now seen corresponding path program 8 times [2023-12-20 08:03:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:31,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742152299] [2023-12-20 08:03:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742152299] [2023-12-20 08:03:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742152299] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504367231] [2023-12-20 08:03:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:32,093 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 08:03:32,121 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 08:03:32,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:32,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:03:32,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:32,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-20 08:03:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504367231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:32,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2023-12-20 08:03:32,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428032104] [2023-12-20 08:03:32,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-20 08:03:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-20 08:03:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 08:03:32,656 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 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 08:03:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:32,917 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-12-20 08:03:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:03:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 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 43 [2023-12-20 08:03:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:32,917 INFO L225 Difference]: With dead ends: 88 [2023-12-20 08:03:32,917 INFO L226 Difference]: Without dead ends: 52 [2023-12-20 08:03:32,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:03:32,918 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:32,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 61 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:03:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-20 08:03:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2023-12-20 08:03:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 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 08:03:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-20 08:03:32,929 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 43 [2023-12-20 08:03:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:32,929 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-20 08:03:32,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 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 08:03:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-20 08:03:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 08:03:32,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:32,929 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:32,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-20 08:03:33,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:33,135 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:33,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1631239963, now seen corresponding path program 9 times [2023-12-20 08:03:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:33,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711248947] [2023-12-20 08:03:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:33,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:33,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711248947] [2023-12-20 08:03:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711248947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972517734] [2023-12-20 08:03:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:03:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:33,610 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 08:03:33,611 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 08:03:33,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:03:33,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:33,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:03:33,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:33,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:03:33,812 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 08:03:33,884 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 7 [2023-12-20 08:03:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:33,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:34,014 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 08:03:34,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972517734] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:34,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:34,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 20 [2023-12-20 08:03:34,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73258459] [2023-12-20 08:03:34,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 08:03:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 08:03:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:03:34,031 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 08:03:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:35,011 INFO L93 Difference]: Finished difference Result 232 states and 308 transitions. [2023-12-20 08:03:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-20 08:03:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 08:03:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:35,013 INFO L225 Difference]: With dead ends: 232 [2023-12-20 08:03:35,013 INFO L226 Difference]: Without dead ends: 230 [2023-12-20 08:03:35,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2023-12-20 08:03:35,015 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 251 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:35,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 153 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:03:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-12-20 08:03:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 55. [2023-12-20 08:03:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 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 08:03:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-12-20 08:03:35,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 44 [2023-12-20 08:03:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:35,031 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-12-20 08:03:35,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 08:03:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-12-20 08:03:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 08:03:35,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:35,032 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:35,042 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 08:03:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 08:03:35,238 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:35,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2053941789, now seen corresponding path program 2 times [2023-12-20 08:03:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:35,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324052784] [2023-12-20 08:03:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324052784] [2023-12-20 08:03:36,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324052784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658493527] [2023-12-20 08:03:36,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:36,515 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 08:03:36,516 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 08:03:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:36,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 08:03:36,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:36,950 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 08:03:37,124 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 08:03:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:37,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:37,268 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:37,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:03:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:37,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658493527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:37,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:37,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 13] total 46 [2023-12-20 08:03:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360395052] [2023-12-20 08:03:37,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-20 08:03:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-20 08:03:37,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1875, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 08:03:37,353 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 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 08:03:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:39,061 INFO L93 Difference]: Finished difference Result 224 states and 300 transitions. [2023-12-20 08:03:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-20 08:03:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 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 08:03:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:39,062 INFO L225 Difference]: With dead ends: 224 [2023-12-20 08:03:39,062 INFO L226 Difference]: Without dead ends: 222 [2023-12-20 08:03:39,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=918, Invalid=6738, Unknown=0, NotChecked=0, Total=7656 [2023-12-20 08:03:39,064 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 789 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 135 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 08:03:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-12-20 08:03:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 48. [2023-12-20 08:03:39,084 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 08:03:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-12-20 08:03:39,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 44 [2023-12-20 08:03:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:39,085 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-12-20 08:03:39,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 0 states have call successors, (0), 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 08:03:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-12-20 08:03:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 08:03:39,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:39,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:39,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 08:03:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:39,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:39,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1279969223, now seen corresponding path program 10 times [2023-12-20 08:03:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148160714] [2023-12-20 08:03:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148160714] [2023-12-20 08:03:40,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148160714] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151624731] [2023-12-20 08:03:40,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:03:40,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:40,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:40,143 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 08:03:40,172 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 08:03:40,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:03:40,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:40,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:03:40,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:40,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:03:40,455 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 7 [2023-12-20 08:03:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:40,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:40,522 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 08:03:40,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:40,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151624731] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:40,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:40,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 33 [2023-12-20 08:03:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549503272] [2023-12-20 08:03:40,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 08:03:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 08:03:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 08:03:40,541 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 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 08:03:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:45,456 INFO L93 Difference]: Finished difference Result 452 states and 608 transitions. [2023-12-20 08:03:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-12-20 08:03:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 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 47 [2023-12-20 08:03:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:45,458 INFO L225 Difference]: With dead ends: 452 [2023-12-20 08:03:45,458 INFO L226 Difference]: Without dead ends: 450 [2023-12-20 08:03:45,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12765 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3215, Invalid=29727, Unknown=0, NotChecked=0, Total=32942 [2023-12-20 08:03:45,461 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2135 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:45,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2135 Valid, 201 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 08:03:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-12-20 08:03:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 60. [2023-12-20 08:03:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 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 08:03:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-12-20 08:03:45,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 47 [2023-12-20 08:03:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:45,476 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-12-20 08:03:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 33 states have internal predecessors, (88), 0 states have call successors, (0), 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 08:03:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-12-20 08:03:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 08:03:45,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:45,477 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:45,482 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 08:03:45,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:45,680 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:45,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1061114505, now seen corresponding path program 2 times [2023-12-20 08:03:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:45,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216039365] [2023-12-20 08:03:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:03:46,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:46,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216039365] [2023-12-20 08:03:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216039365] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964418277] [2023-12-20 08:03:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:46,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:46,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:46,137 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 08:03:46,140 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 08:03:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:46,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 08:03:46,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:46,744 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 08:03:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:46,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:46,890 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:03:46,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:03:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964418277] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:46,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:46,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 14] total 40 [2023-12-20 08:03:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605208382] [2023-12-20 08:03:46,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:46,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 08:03:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 08:03:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:03:46,908 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:48,853 INFO L93 Difference]: Finished difference Result 444 states and 600 transitions. [2023-12-20 08:03:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-20 08:03:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-20 08:03:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:48,855 INFO L225 Difference]: With dead ends: 444 [2023-12-20 08:03:48,855 INFO L226 Difference]: Without dead ends: 442 [2023-12-20 08:03:48,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4595 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1441, Invalid=11669, Unknown=0, NotChecked=0, Total=13110 [2023-12-20 08:03:48,857 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 768 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:48,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 153 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 08:03:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-12-20 08:03:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 51. [2023-12-20 08:03:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-12-20 08:03:48,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 47 [2023-12-20 08:03:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:48,875 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-12-20 08:03:48,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:03:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-12-20 08:03:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 08:03:48,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:48,875 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:48,882 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 08:03:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:49,076 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -838221221, now seen corresponding path program 11 times [2023-12-20 08:03:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296904518] [2023-12-20 08:03:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:03:49,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296904518] [2023-12-20 08:03:49,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296904518] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022380610] [2023-12-20 08:03:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:03:49,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:49,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:49,293 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 08:03:49,317 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 08:03:49,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 08:03:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:49,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:03:49,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:03:49,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:03:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022380610] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:49,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:49,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 08:03:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551993646] [2023-12-20 08:03:49,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:49,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 08:03:49,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 08:03:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-20 08:03:49,815 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 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 08:03:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:50,069 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2023-12-20 08:03:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 08:03:50,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-20 08:03:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:50,071 INFO L225 Difference]: With dead ends: 147 [2023-12-20 08:03:50,071 INFO L226 Difference]: Without dead ends: 80 [2023-12-20 08:03:50,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:03:50,072 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:50,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 68 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:03:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-20 08:03:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2023-12-20 08:03:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 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 08:03:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-12-20 08:03:50,091 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 50 [2023-12-20 08:03:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:50,091 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-12-20 08:03:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 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 08:03:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-12-20 08:03:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-20 08:03:50,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:50,092 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:50,097 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 08:03:50,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:50,292 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1069297348, now seen corresponding path program 12 times [2023-12-20 08:03:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96274831] [2023-12-20 08:03:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 08:03:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96274831] [2023-12-20 08:03:50,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96274831] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543440754] [2023-12-20 08:03:50,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:03:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:50,654 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 08:03:50,669 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 08:03:50,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 08:03:50,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:50,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:03:50,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:03:51,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 57 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 08:03:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543440754] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:51,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 43 [2023-12-20 08:03:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546746000] [2023-12-20 08:03:51,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:51,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-20 08:03:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-20 08:03:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1459, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 08:03:51,625 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 43 states have internal predecessors, (120), 0 states have call successors, (0), 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 08:03:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:52,250 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2023-12-20 08:03:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 08:03:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 43 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-20 08:03:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:52,251 INFO L225 Difference]: With dead ends: 91 [2023-12-20 08:03:52,251 INFO L226 Difference]: Without dead ends: 68 [2023-12-20 08:03:52,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=646, Invalid=3136, Unknown=0, NotChecked=0, Total=3782 [2023-12-20 08:03:52,252 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 317 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:52,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 107 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:03:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-20 08:03:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2023-12-20 08:03:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 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 08:03:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-12-20 08:03:52,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 51 [2023-12-20 08:03:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:52,270 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-12-20 08:03:52,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 43 states have internal predecessors, (120), 0 states have call successors, (0), 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 08:03:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-12-20 08:03:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-20 08:03:52,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:52,271 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:52,276 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 08:03:52,473 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,SelfDestructingSolverStorable22 [2023-12-20 08:03:52,474 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:52,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2014625390, now seen corresponding path program 13 times [2023-12-20 08:03:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:52,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263648099] [2023-12-20 08:03:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 08:03:52,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263648099] [2023-12-20 08:03:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263648099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048180481] [2023-12-20 08:03:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:03:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:52,890 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 08:03:52,892 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 08:03:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:52,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 08:03:53,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 34 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 08:03:53,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 34 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-20 08:03:53,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048180481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:53,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:53,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2023-12-20 08:03:53,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762259823] [2023-12-20 08:03:53,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:53,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-20 08:03:53,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-20 08:03:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 08:03:53,591 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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 08:03:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:03:53,892 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2023-12-20 08:03:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 08:03:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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) Word has length 56 [2023-12-20 08:03:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:03:53,893 INFO L225 Difference]: With dead ends: 112 [2023-12-20 08:03:53,893 INFO L226 Difference]: Without dead ends: 65 [2023-12-20 08:03:53,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=1882, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:03:53,896 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 211 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:03:53,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 71 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:03:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-20 08:03:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2023-12-20 08:03:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 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 08:03:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-12-20 08:03:53,920 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 56 [2023-12-20 08:03:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:03:53,920 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-12-20 08:03:53,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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 08:03:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-12-20 08:03:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 08:03:53,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:03:53,921 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:03:53,925 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 08:03:54,121 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,SelfDestructingSolverStorable23 [2023-12-20 08:03:54,121 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:03:54,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:03:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2084365235, now seen corresponding path program 14 times [2023-12-20 08:03:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:03:54,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330809393] [2023-12-20 08:03:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:03:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:03:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:03:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:03:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:03:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330809393] [2023-12-20 08:03:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330809393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:03:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209276307] [2023-12-20 08:03:54,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:03:54,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:03:54,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:03:54,765 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 08:03:54,789 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 08:03:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:03:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:03:54,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 08:03:54,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:03:55,075 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 08:03:55,105 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 08:03:55,307 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 08:03:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:03:55,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:03:55,456 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 08:03:55,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:03:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:03:55,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209276307] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:03:55,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:03:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 15] total 36 [2023-12-20 08:03:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153252106] [2023-12-20 08:03:55,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:03:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-20 08:03:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:03:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-20 08:03:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:03:55,490 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 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 08:04:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:00,488 INFO L93 Difference]: Finished difference Result 830 states and 1142 transitions. [2023-12-20 08:04:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2023-12-20 08:04:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 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 08:04:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:00,491 INFO L225 Difference]: With dead ends: 830 [2023-12-20 08:04:00,491 INFO L226 Difference]: Without dead ends: 828 [2023-12-20 08:04:00,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4636, Invalid=58114, Unknown=0, NotChecked=0, Total=62750 [2023-12-20 08:04:00,495 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2312 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:00,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 249 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 08:04:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-12-20 08:04:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 68. [2023-12-20 08:04:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 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 08:04:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-12-20 08:04:00,525 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 57 [2023-12-20 08:04:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:00,526 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-12-20 08:04:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 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 08:04:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-12-20 08:04:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 08:04:00,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:00,526 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:00,532 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 08:04:00,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:00,731 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:00,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -287374027, now seen corresponding path program 3 times [2023-12-20 08:04:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881161962] [2023-12-20 08:04:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:00,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:02,182 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 08:04:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881161962] [2023-12-20 08:04:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881161962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947714738] [2023-12-20 08:04:02,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:04:02,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:02,184 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 08:04:02,185 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 08:04:02,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 08:04:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:02,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-20 08:04:02,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:02,733 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 08:04:02,999 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 08:04:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 08:04:03,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:03,125 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:04:03,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:04:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947714738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:03,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:03,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 16] total 50 [2023-12-20 08:04:03,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921985630] [2023-12-20 08:04:03,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 08:04:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 08:04:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:04:03,227 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 50 states, 50 states have (on average 2.74) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 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 08:04:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:08,747 INFO L93 Difference]: Finished difference Result 822 states and 1134 transitions. [2023-12-20 08:04:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-12-20 08:04:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.74) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 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 08:04:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:08,750 INFO L225 Difference]: With dead ends: 822 [2023-12-20 08:04:08,750 INFO L226 Difference]: Without dead ends: 820 [2023-12-20 08:04:08,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11868 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2980, Invalid=33310, Unknown=0, NotChecked=0, Total=36290 [2023-12-20 08:04:08,752 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2344 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2344 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:08,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2344 Valid, 193 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 08:04:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-12-20 08:04:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 61. [2023-12-20 08:04:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:04:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-12-20 08:04:08,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 57 [2023-12-20 08:04:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:08,785 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-12-20 08:04:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.74) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 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 08:04:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-12-20 08:04:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 08:04:08,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:08,786 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:08,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 08:04:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:08,993 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:08,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1307202399, now seen corresponding path program 15 times [2023-12-20 08:04:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782786773] [2023-12-20 08:04:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:04:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782786773] [2023-12-20 08:04:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782786773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563880235] [2023-12-20 08:04:09,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:04:09,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:09,557 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 08:04:09,559 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 08:04:09,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 08:04:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:09,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 08:04:09,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:09,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:04:10,145 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 19 treesize of output 7 [2023-12-20 08:04:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:10,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:10,337 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 08:04:10,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:04:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563880235] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:10,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 29 [2023-12-20 08:04:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727703545] [2023-12-20 08:04:10,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:04:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:04:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:04:10,360 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 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 08:04:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:21,827 INFO L93 Difference]: Finished difference Result 1650 states and 2282 transitions. [2023-12-20 08:04:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2023-12-20 08:04:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 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 60 [2023-12-20 08:04:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:21,831 INFO L225 Difference]: With dead ends: 1650 [2023-12-20 08:04:21,832 INFO L226 Difference]: Without dead ends: 1648 [2023-12-20 08:04:21,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102420 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10705, Invalid=209725, Unknown=0, NotChecked=0, Total=220430 [2023-12-20 08:04:21,842 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3926 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 2831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3926 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 5004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2831 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:21,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3926 Valid, 283 Invalid, 5004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2831 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 08:04:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2023-12-20 08:04:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 73. [2023-12-20 08:04:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 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 08:04:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2023-12-20 08:04:21,923 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 60 [2023-12-20 08:04:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:21,924 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2023-12-20 08:04:21,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 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 08:04:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2023-12-20 08:04:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 08:04:21,924 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:21,924 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:21,939 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 08:04:22,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 08:04:22,133 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:22,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:22,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1816675489, now seen corresponding path program 3 times [2023-12-20 08:04:22,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:22,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804976938] [2023-12-20 08:04:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:04:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804976938] [2023-12-20 08:04:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804976938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418638269] [2023-12-20 08:04:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:04:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:23,173 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 08:04:23,174 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 08:04:23,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 08:04:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:23,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-20 08:04:23,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:23,607 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 08:04:24,001 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 08:04:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:24,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:24,176 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 34 treesize of output 30 [2023-12-20 08:04:24,180 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:04:24,181 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 22 treesize of output 14 [2023-12-20 08:04:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418638269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:24,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 19] total 54 [2023-12-20 08:04:24,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49216393] [2023-12-20 08:04:24,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:24,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-20 08:04:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-20 08:04:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2615, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:04:24,295 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 0 states have call successors, (0), 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 08:04:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:36,787 INFO L93 Difference]: Finished difference Result 1642 states and 2274 transitions. [2023-12-20 08:04:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2023-12-20 08:04:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 0 states have call successors, (0), 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 60 [2023-12-20 08:04:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:36,791 INFO L225 Difference]: With dead ends: 1642 [2023-12-20 08:04:36,791 INFO L226 Difference]: Without dead ends: 1640 [2023-12-20 08:04:36,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41393 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=9175, Invalid=97427, Unknown=0, NotChecked=0, Total=106602 [2023-12-20 08:04:36,796 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4080 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 2358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2358 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:36,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 202 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2358 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 08:04:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2023-12-20 08:04:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 64. [2023-12-20 08:04:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 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 08:04:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2023-12-20 08:04:36,837 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 60 [2023-12-20 08:04:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:36,837 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2023-12-20 08:04:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 54 states have internal predecessors, (144), 0 states have call successors, (0), 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 08:04:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2023-12-20 08:04:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-20 08:04:36,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:36,838 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:36,844 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 08:04:37,038 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,SelfDestructingSolverStorable27 [2023-12-20 08:04:37,038 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -392948493, now seen corresponding path program 16 times [2023-12-20 08:04:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:37,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435595972] [2023-12-20 08:04:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 08:04:37,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435595972] [2023-12-20 08:04:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435595972] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944260668] [2023-12-20 08:04:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:04:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:37,304 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 08:04:37,312 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 08:04:37,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:04:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:37,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-20 08:04:37,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:37,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:04:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944260668] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:38,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:38,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 44 [2023-12-20 08:04:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053823282] [2023-12-20 08:04:38,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:38,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 08:04:38,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 08:04:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1451, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 08:04:38,232 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 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 08:04:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:38,863 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2023-12-20 08:04:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-20 08:04:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 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 08:04:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:38,864 INFO L225 Difference]: With dead ends: 183 [2023-12-20 08:04:38,864 INFO L226 Difference]: Without dead ends: 98 [2023-12-20 08:04:38,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1038, Invalid=3518, Unknown=0, NotChecked=0, Total=4556 [2023-12-20 08:04:38,865 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 542 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:38,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 95 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:04:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-20 08:04:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2023-12-20 08:04:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 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 08:04:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-12-20 08:04:38,905 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 63 [2023-12-20 08:04:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:38,906 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-12-20 08:04:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 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 08:04:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-12-20 08:04:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-20 08:04:38,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:38,906 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:38,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 08:04:39,106 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,SelfDestructingSolverStorable28 [2023-12-20 08:04:39,106 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1388030628, now seen corresponding path program 17 times [2023-12-20 08:04:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:39,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142364250] [2023-12-20 08:04:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 61 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 08:04:39,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:39,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142364250] [2023-12-20 08:04:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142364250] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:39,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555274234] [2023-12-20 08:04:39,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:04:39,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:39,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:39,655 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 08:04:39,675 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 08:04:40,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 08:04:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:40,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:04:40,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 08:04:40,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 08:04:40,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555274234] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:40,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:40,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2023-12-20 08:04:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38024866] [2023-12-20 08:04:40,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:40,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-20 08:04:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-20 08:04:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 08:04:40,919 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 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 08:04:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:04:41,324 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2023-12-20 08:04:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 08:04:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 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 69 [2023-12-20 08:04:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:04:41,325 INFO L225 Difference]: With dead ends: 136 [2023-12-20 08:04:41,325 INFO L226 Difference]: Without dead ends: 78 [2023-12-20 08:04:41,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:04:41,326 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 286 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:04:41,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 84 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:04:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-20 08:04:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-12-20 08:04:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 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 08:04:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2023-12-20 08:04:41,364 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 69 [2023-12-20 08:04:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:04:41,364 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2023-12-20 08:04:41,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 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 08:04:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2023-12-20 08:04:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 08:04:41,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:04:41,365 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:04:41,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 08:04:41,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:41,567 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:04:41,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:04:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2076242139, now seen corresponding path program 18 times [2023-12-20 08:04:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:04:41,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119568509] [2023-12-20 08:04:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:04:41,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:04:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:04:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:04:43,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:04:43,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119568509] [2023-12-20 08:04:43,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119568509] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:04:43,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652931368] [2023-12-20 08:04:43,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:04:43,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:04:43,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:04:43,174 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 08:04:43,176 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 08:04:43,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-20 08:04:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:04:43,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-20 08:04:43,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:04:43,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:04:43,854 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 08:04:44,285 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 7 [2023-12-20 08:04:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:04:44,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:04:44,849 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 08:04:44,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:04:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:04:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652931368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:04:44,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:04:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19, 19] total 59 [2023-12-20 08:04:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359904105] [2023-12-20 08:04:44,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:04:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-20 08:04:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:04:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-20 08:04:44,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3235, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 08:04:44,878 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 59 states, 59 states have (on average 2.6779661016949152) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 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 08:05:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:05:49,957 INFO L93 Difference]: Finished difference Result 3140 states and 4404 transitions. [2023-12-20 08:05:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1066 states. [2023-12-20 08:05:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.6779661016949152) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 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 70 [2023-12-20 08:05:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:05:49,964 INFO L225 Difference]: With dead ends: 3140 [2023-12-20 08:05:49,964 INFO L226 Difference]: Without dead ends: 3138 [2023-12-20 08:05:50,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 1116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570851 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=42007, Invalid=1206799, Unknown=0, NotChecked=0, Total=1248806 [2023-12-20 08:05:50,031 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23703 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 3897 mSolverCounterSat, 13434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23703 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 17331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13434 IncrementalHoareTripleChecker+Valid, 3897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:05:50,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23703 Valid, 402 Invalid, 17331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13434 Valid, 3897 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-12-20 08:05:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2023-12-20 08:05:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 81. [2023-12-20 08:05:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 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 08:05:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-12-20 08:05:50,113 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 70 [2023-12-20 08:05:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:05:50,114 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-12-20 08:05:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.6779661016949152) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 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 08:05:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-12-20 08:05:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 08:05:50,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:05:50,114 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:05:50,125 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 08:05:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:05:50,323 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:05:50,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:05:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2003855581, now seen corresponding path program 4 times [2023-12-20 08:05:50,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:05:50,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689325999] [2023-12-20 08:05:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:05:50,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:05:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:05:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:05:52,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:05:52,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689325999] [2023-12-20 08:05:52,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689325999] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:05:52,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647937416] [2023-12-20 08:05:52,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:05:52,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:05:52,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:05:52,405 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 08:05:52,406 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 08:05:52,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:05:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:05:52,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 08:05:52,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:05:52,870 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 08:05:53,407 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 7 [2023-12-20 08:05:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:05:53,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:05:53,943 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:05:53,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:05:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:05:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647937416] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:05:54,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:05:54,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 19] total 68 [2023-12-20 08:05:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356956013] [2023-12-20 08:05:54,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:05:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-20 08:05:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:05:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-20 08:05:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4257, Unknown=0, NotChecked=0, Total=4556 [2023-12-20 08:05:54,152 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 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 08:06:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:06:30,328 INFO L93 Difference]: Finished difference Result 3132 states and 4396 transitions. [2023-12-20 08:06:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 536 states. [2023-12-20 08:06:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 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) Word has length 70 [2023-12-20 08:06:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:06:30,337 INFO L225 Difference]: With dead ends: 3132 [2023-12-20 08:06:30,337 INFO L226 Difference]: Without dead ends: 3130 [2023-12-20 08:06:30,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144450 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=16902, Invalid=332970, Unknown=0, NotChecked=0, Total=349872 [2023-12-20 08:06:30,353 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13635 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 6624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13635 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 10752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6624 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-20 08:06:30,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13635 Valid, 335 Invalid, 10752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6624 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-20 08:06:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2023-12-20 08:06:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 74. [2023-12-20 08:06:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.178082191780822) internal successors, (86), 73 states have internal predecessors, (86), 0 states have call successors, (0), 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 08:06:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2023-12-20 08:06:30,425 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 70 [2023-12-20 08:06:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:06:30,426 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2023-12-20 08:06:30,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.7058823529411766) internal successors, (184), 68 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 08:06:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2023-12-20 08:06:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 08:06:30,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:06:30,426 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:06:30,432 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 08:06:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:06:30,627 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:06:30,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:06:30,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1510780537, now seen corresponding path program 19 times [2023-12-20 08:06:30,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:06:30,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586673873] [2023-12-20 08:06:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:06:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:06:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:06:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:06:31,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:06:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586673873] [2023-12-20 08:06:31,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586673873] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:06:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141001721] [2023-12-20 08:06:31,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:06:31,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:06:31,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:06:31,948 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 08:06:31,950 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 08:06:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:06:32,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-20 08:06:32,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:06:32,425 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 08:06:32,886 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 08:06:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:06:32,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:06:32,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-20 08:06:32,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-20 08:06:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:06:33,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141001721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:06:33,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:06:33,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 19] total 61 [2023-12-20 08:06:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338372300] [2023-12-20 08:06:33,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:06:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-20 08:06:33,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:06:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-20 08:06:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3420, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 08:06:33,167 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 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 08:09:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:09:43,844 INFO L93 Difference]: Finished difference Result 6276 states and 8820 transitions. [2023-12-20 08:09:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2124 states. [2023-12-20 08:09:43,844 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 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 73 [2023-12-20 08:09:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:09:43,858 INFO L225 Difference]: With dead ends: 6276 [2023-12-20 08:09:43,858 INFO L226 Difference]: Without dead ends: 6274 [2023-12-20 08:09:44,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2301 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 2181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311290 ImplicationChecksByTransitivity, 160.3s TimeCoverageRelationStatistics Valid=172364, Invalid=4590942, Unknown=0, NotChecked=0, Total=4763306 [2023-12-20 08:09:44,450 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37423 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 4548 mSolverCounterSat, 19655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37423 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 24203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19655 IncrementalHoareTripleChecker+Valid, 4548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:09:44,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37423 Valid, 454 Invalid, 24203 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19655 Valid, 4548 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2023-12-20 08:09:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2023-12-20 08:09:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 86. [2023-12-20 08:09:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 0 states have call successors, (0), 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 08:09:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2023-12-20 08:09:44,588 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 73 [2023-12-20 08:09:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:09:44,588 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2023-12-20 08:09:44,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 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 08:09:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2023-12-20 08:09:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 08:09:44,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:09:44,589 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:09:44,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 08:09:44,795 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,SelfDestructingSolverStorable32 [2023-12-20 08:09:44,795 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:09:44,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:09:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -733202761, now seen corresponding path program 4 times [2023-12-20 08:09:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:09:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250180118] [2023-12-20 08:09:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:09:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:09:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:09:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:09:45,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:09:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250180118] [2023-12-20 08:09:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250180118] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:09:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937800906] [2023-12-20 08:09:45,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:09:45,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:09:45,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:09:45,880 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 08:09:45,882 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 08:09:46,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:09:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:09:46,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 08:09:46,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:09:46,719 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 7 [2023-12-20 08:09:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:09:46,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:09:47,252 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:09:47,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:09:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:09:47,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937800906] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:09:47,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:09:47,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 20] total 63 [2023-12-20 08:09:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714768992] [2023-12-20 08:09:47,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:09:47,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-20 08:09:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:09:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-20 08:09:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3635, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 08:09:47,634 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 63 states have internal predecessors, (190), 0 states have call successors, (0), 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 08:10:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:10:52,926 INFO L93 Difference]: Finished difference Result 6268 states and 8812 transitions. [2023-12-20 08:10:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1052 states. [2023-12-20 08:10:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 63 states have internal predecessors, (190), 0 states have call successors, (0), 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 73 [2023-12-20 08:10:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:10:52,940 INFO L225 Difference]: With dead ends: 6268 [2023-12-20 08:10:52,940 INFO L226 Difference]: Without dead ends: 6266 [2023-12-20 08:10:52,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1085 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554000 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=52498, Invalid=1127984, Unknown=0, NotChecked=0, Total=1180482 [2023-12-20 08:10:52,983 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16358 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 10948 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16358 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 14920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10948 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:10:52,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16358 Valid, 298 Invalid, 14920 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10948 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-20 08:10:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6266 states. [2023-12-20 08:10:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6266 to 77. [2023-12-20 08:10:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 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 08:10:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-12-20 08:10:53,078 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 73 [2023-12-20 08:10:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:10:53,078 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-12-20 08:10:53,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 63 states have internal predecessors, (190), 0 states have call successors, (0), 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 08:10:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-12-20 08:10:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 08:10:53,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:10:53,078 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:10:53,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 08:10:53,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:10:53,279 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:10:53,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:10:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash 705930267, now seen corresponding path program 20 times [2023-12-20 08:10:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:10:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494717098] [2023-12-20 08:10:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:10:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:10:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:10:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:10:53,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:10:53,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494717098] [2023-12-20 08:10:53,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494717098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:10:53,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532580971] [2023-12-20 08:10:53,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:10:53,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:10:53,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:10:53,658 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 08:10:53,661 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 08:10:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:10:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:10:53,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:10:53,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:10:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:10:54,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:10:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:10:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532580971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:10:54,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:10:54,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-20 08:10:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761271268] [2023-12-20 08:10:54,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:10:54,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:10:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:10:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:10:54,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:10:54,306 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 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 08:10:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:10:54,966 INFO L93 Difference]: Finished difference Result 219 states and 263 transitions. [2023-12-20 08:10:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 08:10:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 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 76 [2023-12-20 08:10:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:10:54,966 INFO L225 Difference]: With dead ends: 219 [2023-12-20 08:10:54,967 INFO L226 Difference]: Without dead ends: 118 [2023-12-20 08:10:54,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 21 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:10:54,967 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 387 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:10:54,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 108 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:10:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-20 08:10:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2023-12-20 08:10:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:10:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2023-12-20 08:10:55,045 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 76 [2023-12-20 08:10:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:10:55,045 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2023-12-20 08:10:55,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 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 08:10:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2023-12-20 08:10:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 08:10:55,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:10:55,046 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:10:55,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 08:10:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:10:55,252 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:10:55,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:10:55,252 INFO L85 PathProgramCache]: Analyzing trace with hash 922217404, now seen corresponding path program 21 times [2023-12-20 08:10:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:10:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872951805] [2023-12-20 08:10:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:10:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:10:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:10:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-20 08:10:55,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:10:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872951805] [2023-12-20 08:10:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872951805] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:10:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732924221] [2023-12-20 08:10:55,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:10:55,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:10:55,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:10:55,869 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 08:10:55,871 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 08:10:56,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 08:10:56,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:10:56,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 08:10:56,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:10:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-20 08:10:56,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:10:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-20 08:10:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732924221] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:10:57,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:10:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2023-12-20 08:10:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606565917] [2023-12-20 08:10:57,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:10:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-20 08:10:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:10:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-20 08:10:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=2635, Unknown=0, NotChecked=0, Total=3306 [2023-12-20 08:10:57,503 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 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 08:10:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:10:58,263 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2023-12-20 08:10:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 08:10:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 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 77 [2023-12-20 08:10:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:10:58,263 INFO L225 Difference]: With dead ends: 141 [2023-12-20 08:10:58,263 INFO L226 Difference]: Without dead ends: 106 [2023-12-20 08:10:58,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1271, Invalid=4279, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 08:10:58,265 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 333 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:10:58,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 115 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:10:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-20 08:10:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2023-12-20 08:10:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 82 states have internal predecessors, (97), 0 states have call successors, (0), 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 08:10:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-12-20 08:10:58,364 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 77 [2023-12-20 08:10:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:10:58,364 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-12-20 08:10:58,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 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 08:10:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-12-20 08:10:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 08:10:58,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:10:58,364 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:10:58,370 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 08:10:58,565 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,SelfDestructingSolverStorable35 [2023-12-20 08:10:58,565 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:10:58,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:10:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash -724393966, now seen corresponding path program 22 times [2023-12-20 08:10:58,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:10:58,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846261531] [2023-12-20 08:10:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:10:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:10:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:10:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 60 proven. 87 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-20 08:10:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:10:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846261531] [2023-12-20 08:10:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846261531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:10:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635334338] [2023-12-20 08:10:59,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:10:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:10:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:10:59,122 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 08:10:59,124 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 08:10:59,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:10:59,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:10:59,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 08:10:59,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:10:59,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 08:10:59,401 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 08:10:59,684 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 19 treesize of output 7 [2023-12-20 08:10:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 08:10:59,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:11:00,132 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 08:11:00,135 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 20 treesize of output 16 [2023-12-20 08:11:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 08:11:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635334338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:11:00,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:11:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 54 [2023-12-20 08:11:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891101066] [2023-12-20 08:11:00,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:11:00,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-20 08:11:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:11:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-20 08:11:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2635, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:11:00,176 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 0 states have call successors, (0), 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 08:14:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:14:27,878 INFO L93 Difference]: Finished difference Result 8293 states and 11804 transitions. [2023-12-20 08:14:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2111 states. [2023-12-20 08:14:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 0 states have call successors, (0), 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 08:14:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:14:27,896 INFO L225 Difference]: With dead ends: 8293 [2023-12-20 08:14:27,897 INFO L226 Difference]: Without dead ends: 8078 [2023-12-20 08:14:28,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2278 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 2144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262707 ImplicationChecksByTransitivity, 149.7s TimeCoverageRelationStatistics Valid=175818, Invalid=4427352, Unknown=0, NotChecked=0, Total=4603170 [2023-12-20 08:14:28,178 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38741 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 3576 mSolverCounterSat, 26254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38741 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 29830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26254 IncrementalHoareTripleChecker+Valid, 3576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:14:28,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38741 Valid, 375 Invalid, 29830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26254 Valid, 3576 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2023-12-20 08:14:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2023-12-20 08:14:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 94. [2023-12-20 08:14:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2043010752688172) internal successors, (112), 93 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 08:14:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-12-20 08:14:28,612 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 82 [2023-12-20 08:14:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:14:28,612 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-12-20 08:14:28,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 54 states have internal predecessors, (160), 0 states have call successors, (0), 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 08:14:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-12-20 08:14:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-20 08:14:28,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:14:28,612 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 10, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:14:28,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-20 08:14:28,813 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,SelfDestructingSolverStorable36 [2023-12-20 08:14:28,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:14:28,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:14:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1475533173, now seen corresponding path program 5 times [2023-12-20 08:14:28,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:14:28,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877465984] [2023-12-20 08:14:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:14:28,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:14:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:14:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:14:31,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:14:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877465984] [2023-12-20 08:14:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877465984] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:14:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404826852] [2023-12-20 08:14:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:14:31,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:14:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:14:31,746 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:14:31,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 08:14:32,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-20 08:14:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:14:32,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-20 08:14:32,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:14:32,992 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 08:14:33,587 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 08:14:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:14:33,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:14:33,830 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-20 08:14:33,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-12-20 08:14:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 08:14:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404826852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:14:34,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:14:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29, 23] total 74 [2023-12-20 08:14:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348751146] [2023-12-20 08:14:34,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:14:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-20 08:14:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:14:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-20 08:14:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=5078, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 08:14:34,170 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 74 states, 74 states have (on average 2.7972972972972974) internal successors, (207), 74 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-20 08:15:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1021 states. [2023-12-20 08:15:47,642 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 08:15:47,642 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 08:15:47,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536489 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=40379, Invalid=1153177, Unknown=0, NotChecked=0, Total=1193556 [2023-12-20 08:15:47,662 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19077 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 4207 mSolverCounterSat, 7611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19077 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7611 IncrementalHoareTripleChecker+Valid, 4207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:15:47,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19077 Valid, 226 Invalid, 11818 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7611 Valid, 4207 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-20 08:15:47,664 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 08:15:47,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-20 08:15:47,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-20 08:15:47,864 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (94states) and FLOYD_HOARE automaton (currently 1021 states, 74 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1093 known predicates. [2023-12-20 08:15:47,868 INFO L445 BasicCegarLoop]: Path program histogram: [22, 5, 4, 2, 1, 1, 1, 1, 1] [2023-12-20 08:15:47,869 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 08:15:47,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 08:15:47 BoogieIcfgContainer [2023-12-20 08:15:47,871 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 08:15:47,871 INFO L158 Benchmark]: Toolchain (without parser) took 757751.25ms. Allocated memory was 188.7MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 139.5MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2023-12-20 08:15:47,871 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 08:15:47,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.31ms. Allocated memory is still 188.7MB. Free memory was 139.3MB in the beginning and 128.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 08:15:47,872 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.33ms. Allocated memory is still 188.7MB. Free memory was 128.0MB in the beginning and 126.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 08:15:47,872 INFO L158 Benchmark]: Boogie Preprocessor took 43.27ms. Allocated memory is still 188.7MB. Free memory was 126.3MB in the beginning and 124.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 08:15:47,872 INFO L158 Benchmark]: RCFGBuilder took 279.56ms. Allocated memory is still 188.7MB. Free memory was 124.4MB in the beginning and 111.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 08:15:47,872 INFO L158 Benchmark]: TraceAbstraction took 757165.81ms. Allocated memory was 188.7MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 111.0MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2023-12-20 08:15:47,873 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 141.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 227.31ms. Allocated memory is still 188.7MB. Free memory was 139.3MB in the beginning and 128.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.33ms. Allocated memory is still 188.7MB. Free memory was 128.0MB in the beginning and 126.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.27ms. Allocated memory is still 188.7MB. Free memory was 126.3MB in the beginning and 124.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 279.56ms. Allocated memory is still 188.7MB. Free memory was 124.4MB in the beginning and 111.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 757165.81ms. Allocated memory was 188.7MB in the beginning and 7.9GB in the end (delta: 7.8GB). Free memory was 111.0MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was constructing difference of abstraction (94states) and FLOYD_HOARE automaton (currently 1021 states, 74 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1093 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 757.1s, OverallIterations: 38, TraceHistogramMax: 12, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 695.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 170702 SdHoareTripleChecker+Valid, 67.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 170702 mSDsluCounter, 5318 SdHoareTripleChecker+Invalid, 58.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4831 mSDsCounter, 94861 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46562 IncrementalHoareTripleChecker+Invalid, 141423 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 94861 mSolverCounterUnsat, 487 mSDtfsCounter, 46562 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13687 GetRequests, 2730 SyntacticMatches, 109 SemanticMatches, 10847 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602244 ImplicationChecksByTransitivity, 538.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=37, InterpolantAutomatonStates: 8939, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 37 MinimizatonAttempts, 33106 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 45.3s InterpolantComputationTime, 3425 NumberOfCodeBlocks, 3353 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 5012 ConstructedInterpolants, 0 QuantifiedInterpolants, 42478 SizeOfPredicates, 300 NumberOfNonLiveVariables, 7140 ConjunctsInSsa, 1044 ConjunctsInUnsatCore, 108 InterpolantComputations, 3 PerfectInterpolantSequences, 4446/11634 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown