/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/bAnd5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:07:01,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:07:01,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 19:07:01,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:07:01,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:07:01,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:07:01,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:07:01,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:07:01,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:07:01,527 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:07:01,527 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:07:01,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:07:01,528 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:07:01,529 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:07:01,529 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:07:01,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:07:01,530 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:07:01,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:07:01,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:07:01,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:07:01,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:07:01,532 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:07:01,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:07:01,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:07:01,533 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:07:01,533 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:07:01,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:07:01,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:07:01,534 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:07:01,534 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:07:01,535 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:07:01,535 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:07:01,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:07:01,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:07:01,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:07:01,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:07:01,536 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:07:01,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:07:01,537 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:07:01,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:07:01,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:07:01,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:07:01,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:07:01,777 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:07:01,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd5.i [2023-12-18 19:07:02,854 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:07:03,004 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:07:03,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd5.i [2023-12-18 19:07:03,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf7aa81c/6e677632298a43cfb20ca49b55e81bbd/FLAGbbdd51d86 [2023-12-18 19:07:03,018 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf7aa81c/6e677632298a43cfb20ca49b55e81bbd [2023-12-18 19:07:03,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:07:03,021 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:07:03,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:07:03,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:07:03,025 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:07:03,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c70350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03, skipping insertion in model container [2023-12-18 19:07:03,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,039 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:07:03,161 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-crafted/bAnd5.i[1369,1382] [2023-12-18 19:07:03,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:07:03,169 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:07:03,185 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-crafted/bAnd5.i[1369,1382] [2023-12-18 19:07:03,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:07:03,200 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:07:03,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03 WrapperNode [2023-12-18 19:07:03,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:07:03,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:07:03,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:07:03,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:07:03,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,224 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2023-12-18 19:07:03,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:07:03,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:07:03,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:07:03,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:07:03,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,238 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,258 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 8, 11]. 52 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 5 writes are split as follows [0, 0, 5]. [2023-12-18 19:07:03,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,273 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,274 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:07:03,276 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:07:03,276 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:07:03,276 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:07:03,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (1/1) ... [2023-12-18 19:07:03,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:07:03,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:03,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 19:07:03,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:07:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-12-18 19:07:03,349 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:07:03,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 19:07:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:07:03,431 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:07:03,433 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:07:03,562 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:07:03,595 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:07:03,596 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 19:07:03,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:07:03 BoogieIcfgContainer [2023-12-18 19:07:03,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:07:03,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:07:03,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:07:03,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:07:03,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:07:03" (1/3) ... [2023-12-18 19:07:03,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22792ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:07:03, skipping insertion in model container [2023-12-18 19:07:03,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:07:03" (2/3) ... [2023-12-18 19:07:03,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22792ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:07:03, skipping insertion in model container [2023-12-18 19:07:03,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:07:03" (3/3) ... [2023-12-18 19:07:03,601 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2023-12-18 19:07:03,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:07:03,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:07:03,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:07:03,644 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;@79c246ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:07:03,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:07:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:07:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:07:03,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:03,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:03,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:03,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1964731183, now seen corresponding path program 1 times [2023-12-18 19:07:03,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:03,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439206894] [2023-12-18 19:07:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:03,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:07:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:07:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:03,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:07:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:07:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439206894] [2023-12-18 19:07:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439206894] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:07:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:07:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 19:07:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440629837] [2023-12-18 19:07:03,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:07:03,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:07:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:07:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:07:03,909 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:07:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:03,955 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2023-12-18 19:07:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:07:03,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-18 19:07:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:03,962 INFO L225 Difference]: With dead ends: 48 [2023-12-18 19:07:03,962 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 19:07:03,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:07:03,966 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 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 [2023-12-18 19:07:03,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:07:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 19:07:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-18 19:07:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:07:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-12-18 19:07:03,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-12-18 19:07:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:03,989 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-12-18 19:07:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:07:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-12-18 19:07:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 19:07:03,990 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:03,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:03,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 19:07:03,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:03,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash -659427290, now seen corresponding path program 1 times [2023-12-18 19:07:03,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:03,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324339256] [2023-12-18 19:07:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-12-18 19:07:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 19:07:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 19:07:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 19:07:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324339256] [2023-12-18 19:07:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324339256] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:04,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102587134] [2023-12-18 19:07:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:04,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:04,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:04,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 19:07:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:07:04,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:07:04,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:07:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:07:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102587134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:07:04,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:07:04,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-12-18 19:07:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68314988] [2023-12-18 19:07:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:07:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 19:07:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 19:07:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:07:04,371 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 19:07:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:04,468 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2023-12-18 19:07:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 19:07:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27 [2023-12-18 19:07:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:04,469 INFO L225 Difference]: With dead ends: 47 [2023-12-18 19:07:04,469 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 19:07:04,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-18 19:07:04,471 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:04,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 76 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:07:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 19:07:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-12-18 19:07:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:07:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-12-18 19:07:04,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 27 [2023-12-18 19:07:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:04,484 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-12-18 19:07:04,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 19:07:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-12-18 19:07:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 19:07:04,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:04,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:04,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 19:07:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:04,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:04,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1460644231, now seen corresponding path program 1 times [2023-12-18 19:07:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954454277] [2023-12-18 19:07:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:07:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:07:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 19:07:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:07:04,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:04,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954454277] [2023-12-18 19:07:04,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954454277] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:04,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377641979] [2023-12-18 19:07:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:04,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:04,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 19:07:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:04,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 19:07:04,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:07:04,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:07:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377641979] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:07:04,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:07:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-12-18 19:07:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761866116] [2023-12-18 19:07:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:07:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 19:07:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 19:07:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 19:07:04,911 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:07:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:04,939 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-12-18 19:07:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:07:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-12-18 19:07:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:04,941 INFO L225 Difference]: With dead ends: 40 [2023-12-18 19:07:04,941 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 19:07:04,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 19:07:04,943 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:04,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:07:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 19:07:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-18 19:07:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:07:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-12-18 19:07:04,951 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 37 [2023-12-18 19:07:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:04,952 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-12-18 19:07:04,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:07:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-12-18 19:07:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 19:07:04,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:04,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:04,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:07:05,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-18 19:07:05,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:05,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash 321870837, now seen corresponding path program 1 times [2023-12-18 19:07:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:05,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481580570] [2023-12-18 19:07:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:05,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:07:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:05,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:07:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 19:07:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 19:07:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481580570] [2023-12-18 19:07:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481580570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110393742] [2023-12-18 19:07:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:05,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:05,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:05,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 19:07:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:06,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 19:07:06,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 19:07:06,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:07:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 19:07:06,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110393742] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:07:06,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:07:06,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2023-12-18 19:07:06,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527725570] [2023-12-18 19:07:06,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:07:06,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 19:07:06,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 19:07:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-18 19:07:06,375 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 19:07:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:06,492 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-12-18 19:07:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 19:07:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-12-18 19:07:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:06,496 INFO L225 Difference]: With dead ends: 73 [2023-12-18 19:07:06,496 INFO L226 Difference]: Without dead ends: 52 [2023-12-18 19:07:06,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:07:06,498 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:06,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 265 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:07:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-18 19:07:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2023-12-18 19:07:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-18 19:07:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-12-18 19:07:06,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 38 [2023-12-18 19:07:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:06,507 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-12-18 19:07:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 19:07:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-12-18 19:07:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:07:06,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:06,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:06,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 19:07:06,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:06,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:06,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 226459729, now seen corresponding path program 1 times [2023-12-18 19:07:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:06,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707658975] [2023-12-18 19:07:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:07,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:07:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:07,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:07:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:07,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 19:07:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:07:07,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707658975] [2023-12-18 19:07:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707658975] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549761031] [2023-12-18 19:07:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:07,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:07,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 19:07:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:07,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 19:07:07,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:07,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:07:07,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:07:07,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2023-12-18 19:07:07,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:07:07,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2023-12-18 19:07:07,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:07:07,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 19:07:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:07:08,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:07:08,829 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 176 treesize of output 156 [2023-12-18 19:07:08,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:07:08,835 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 117 treesize of output 107 [2023-12-18 19:07:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:07:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549761031] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:07:08,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:07:08,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 18] total 47 [2023-12-18 19:07:08,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950339265] [2023-12-18 19:07:08,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:07:08,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 19:07:08,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 19:07:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 19:07:08,911 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 47 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:07:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:10,768 INFO L93 Difference]: Finished difference Result 227 states and 322 transitions. [2023-12-18 19:07:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-18 19:07:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 39 [2023-12-18 19:07:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:10,774 INFO L225 Difference]: With dead ends: 227 [2023-12-18 19:07:10,774 INFO L226 Difference]: Without dead ends: 191 [2023-12-18 19:07:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=894, Invalid=6078, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 19:07:10,780 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 188 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:07:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-18 19:07:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 136. [2023-12-18 19:07:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 116 states have internal predecessors, (141), 16 states have call successors, (16), 4 states have call predecessors, (16), 11 states have return successors, (55), 15 states have call predecessors, (55), 16 states have call successors, (55) [2023-12-18 19:07:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 212 transitions. [2023-12-18 19:07:10,829 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 212 transitions. Word has length 39 [2023-12-18 19:07:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:10,830 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 212 transitions. [2023-12-18 19:07:10,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:07:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 212 transitions. [2023-12-18 19:07:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:07:10,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:10,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:10,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:07:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:11,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:11,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 186734509, now seen corresponding path program 2 times [2023-12-18 19:07:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450814603] [2023-12-18 19:07:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:11,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:07:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:11,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:07:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:11,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:07:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:07:11,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450814603] [2023-12-18 19:07:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450814603] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286589697] [2023-12-18 19:07:11,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:07:11,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:11,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 19:07:11,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:07:11,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:07:11,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-18 19:07:11,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:11,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:07:11,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:07:11,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 19:07:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 19:07:12,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:07:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:07:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286589697] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:07:12,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:07:12,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2023-12-18 19:07:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803939657] [2023-12-18 19:07:12,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:07:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 19:07:12,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 19:07:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 19:07:12,397 INFO L87 Difference]: Start difference. First operand 136 states and 212 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-18 19:07:16,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:20,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:24,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:28,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:32,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:36,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:40,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:44,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:48,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:53,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:54,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:07:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:54,532 INFO L93 Difference]: Finished difference Result 302 states and 430 transitions. [2023-12-18 19:07:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 19:07:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2023-12-18 19:07:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:54,534 INFO L225 Difference]: With dead ends: 302 [2023-12-18 19:07:54,534 INFO L226 Difference]: Without dead ends: 188 [2023-12-18 19:07:54,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=2571, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 19:07:54,535 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 68 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:54,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 197 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 776 Invalid, 12 Unknown, 0 Unchecked, 41.7s Time] [2023-12-18 19:07:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-18 19:07:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2023-12-18 19:07:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 125 states have (on average 1.288) internal successors, (161), 133 states have internal predecessors, (161), 17 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2023-12-18 19:07:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 226 transitions. [2023-12-18 19:07:54,554 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 226 transitions. Word has length 39 [2023-12-18 19:07:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:54,555 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 226 transitions. [2023-12-18 19:07:54,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-18 19:07:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 226 transitions. [2023-12-18 19:07:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 19:07:54,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:54,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:54,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 19:07:54,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:54,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash 706869020, now seen corresponding path program 3 times [2023-12-18 19:07:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:54,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658921970] [2023-12-18 19:07:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:54,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 19:07:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:07:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:54,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:07:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:07:54,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:07:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658921970] [2023-12-18 19:07:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658921970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:07:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462847492] [2023-12-18 19:07:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:07:54,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:07:54,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:07:54,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 19:07:54,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 19:07:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:07:54,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 19:07:54,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:07:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:07:55,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:07:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:07:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462847492] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:07:55,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:07:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2023-12-18 19:07:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973815348] [2023-12-18 19:07:55,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:07:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:07:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:07:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:07:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:07:55,111 INFO L87 Difference]: Start difference. First operand 156 states and 226 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-18 19:07:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:07:55,292 INFO L93 Difference]: Finished difference Result 332 states and 491 transitions. [2023-12-18 19:07:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 19:07:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2023-12-18 19:07:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:07:55,297 INFO L225 Difference]: With dead ends: 332 [2023-12-18 19:07:55,297 INFO L226 Difference]: Without dead ends: 263 [2023-12-18 19:07:55,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:07:55,298 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:07:55,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 307 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:07:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-18 19:07:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 229. [2023-12-18 19:07:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.2872340425531914) internal successors, (242), 199 states have internal predecessors, (242), 21 states have call successors, (21), 9 states have call predecessors, (21), 19 states have return successors, (70), 20 states have call predecessors, (70), 21 states have call successors, (70) [2023-12-18 19:07:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 333 transitions. [2023-12-18 19:07:55,332 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 333 transitions. Word has length 40 [2023-12-18 19:07:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:07:55,333 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 333 transitions. [2023-12-18 19:07:55,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-18 19:07:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 333 transitions. [2023-12-18 19:07:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 19:07:55,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:07:55,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:07:55,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-18 19:07:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:07:55,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:07:55,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:07:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1870235005, now seen corresponding path program 1 times [2023-12-18 19:07:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:07:55,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669212281] [2023-12-18 19:07:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:07:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:07:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:56,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:07:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:07:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:07:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 19:07:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat