/usr/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:42:13,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:42:13,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:42:13,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:42:13,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:42:13,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:42:13,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:42:13,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:42:13,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:42:13,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:42:13,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:42:13,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-01 02:42:13,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:42:13,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:42:13,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:42:13,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:42:13,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:42:13,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:42:13,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:42:13,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:42:13,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:42:13,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:42:13,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:42:13,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:42:13,629 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:42:13,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:42:13,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:42:13,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:42:13,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:42:13,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:42:13,631 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:42:13,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:42:13,632 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:42:13,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:42:13,632 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:42:13,633 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:42:13,633 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:42:13,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:42:13,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:42:13,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:42:13,635 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:42:13,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:42:13,635 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:42:13,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:42:13,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:42:13,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:42:13,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:42:13,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:42:13,636 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:42:13,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:42:13,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:42:13,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:42:13,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:42:13,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:42:13,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:42:13,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:42:13,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:42:13,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:42:13,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:42:13,861 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:42:13,861 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:42:13,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_03.i [2023-04-01 02:42:14,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:42:15,147 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:42:15,148 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i [2023-04-01 02:42:15,153 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd4542c16/b52639c449524d9eb4d390c46706cb1d/FLAG72acdc39b [2023-04-01 02:42:15,168 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd4542c16/b52639c449524d9eb4d390c46706cb1d [2023-04-01 02:42:15,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:42:15,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:42:15,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:42:15,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:42:15,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:42:15,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5485930d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15, skipping insertion in model container [2023-04-01 02:42:15,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:42:15,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:42:15,326 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2023-04-01 02:42:15,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:42:15,344 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:42:15,353 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2023-04-01 02:42:15,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:42:15,370 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:42:15,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15 WrapperNode [2023-04-01 02:42:15,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:42:15,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:42:15,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:42:15,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:42:15,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,393 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:42:15,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:42:15,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:42:15,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:42:15,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (1/1) ... [2023-04-01 02:42:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:42:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:15,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:42:15,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:42:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:42:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:42:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:42:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:42:15,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:42:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:42:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:42:15,505 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:42:15,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:42:15,623 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:42:15,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:42:15,644 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:42:15,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:42:15 BoogieIcfgContainer [2023-04-01 02:42:15,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:42:15,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:42:15,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:42:15,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:42:15,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:42:15" (1/3) ... [2023-04-01 02:42:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a825ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:42:15, skipping insertion in model container [2023-04-01 02:42:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:42:15" (2/3) ... [2023-04-01 02:42:15,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a825ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:42:15, skipping insertion in model container [2023-04-01 02:42:15,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:42:15" (3/3) ... [2023-04-01 02:42:15,653 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2023-04-01 02:42:15,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:42:15,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:42:15,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:42:15,710 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3cabecbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:42:15,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:42:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:42:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:42:15,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:15,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:15,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:15,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1320884995, now seen corresponding path program 1 times [2023-04-01 02:42:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:15,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130472376] [2023-04-01 02:42:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:42:15,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130472376] [2023-04-01 02:42:15,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130472376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:42:15,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:42:15,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:42:15,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894733496] [2023-04-01 02:42:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:42:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:42:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:42:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:42:15,953 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:16,017 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-01 02:42:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:42:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:42:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:16,024 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:42:16,024 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 02:42:16,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:42:16,029 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:16,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:42:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 02:42:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 02:42:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-01 02:42:16,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-04-01 02:42:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:16,060 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-01 02:42:16,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-01 02:42:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:42:16,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:16,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:42:16,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:16,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash -256932371, now seen corresponding path program 1 times [2023-04-01 02:42:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:16,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689550269] [2023-04-01 02:42:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:42:16,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:16,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689550269] [2023-04-01 02:42:16,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689550269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:16,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764344966] [2023-04-01 02:42:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:16,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:16,233 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) [2023-04-01 02:42:16,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:42:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:16,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:42:16,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:42:16,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:42:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764344966] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:42:16,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:42:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-01 02:42:16,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423972176] [2023-04-01 02:42:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:42:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:42:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:16,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:42:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:42:16,326 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:16,360 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-01 02:42:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:42:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:42:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:16,362 INFO L225 Difference]: With dead ends: 30 [2023-04-01 02:42:16,362 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:42:16,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:42:16,365 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:16,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:42:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:42:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-01 02:42:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 02:42:16,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-01 02:42:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:16,372 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 02:42:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 02:42:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:42:16,373 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:16,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:16,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:16,574 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 [2023-04-01 02:42:16,574 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:16,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 236958900, now seen corresponding path program 1 times [2023-04-01 02:42:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4935665] [2023-04-01 02:42:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:42:16,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4935665] [2023-04-01 02:42:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4935665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:16,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907594131] [2023-04-01 02:42:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:16,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:16,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:16,687 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) [2023-04-01 02:42:16,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:42:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:16,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:42:16,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:42:16,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:42:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907594131] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155278226] [2023-04-01 02:42:16,843 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:16,843 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:16,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:16,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:16,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:16,955 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:17,194 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:17,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:17,246 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:17,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:17,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:17,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:17,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:42:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808794312] [2023-04-01 02:42:17,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:17,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:42:17,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:42:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:42:17,727 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:17,780 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-04-01 02:42:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:42:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 02:42:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:17,783 INFO L225 Difference]: With dead ends: 39 [2023-04-01 02:42:17,783 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 02:42:17,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:42:17,786 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:17,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:42:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 02:42:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-04-01 02:42:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 02:42:17,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-04-01 02:42:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:17,801 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 02:42:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 02:42:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:42:17,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:17,803 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:17,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:18,015 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 [2023-04-01 02:42:18,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:18,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1112077789, now seen corresponding path program 2 times [2023-04-01 02:42:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:18,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230093844] [2023-04-01 02:42:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:18,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:42:18,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230093844] [2023-04-01 02:42:18,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230093844] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859194962] [2023-04-01 02:42:18,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:42:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:18,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:18,150 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) [2023-04-01 02:42:18,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:42:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:42:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:18,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:42:18,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:42:18,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:42:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859194962] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:18,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216783141] [2023-04-01 02:42:18,267 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:18,267 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:18,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:18,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:18,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:18,303 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:18,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:18,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:18,494 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:18,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:18,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:18,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 02:42:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205604367] [2023-04-01 02:42:18,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:18,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 02:42:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 02:42:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-04-01 02:42:18,903 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:18,992 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-04-01 02:42:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 02:42:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 02:42:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:18,997 INFO L225 Difference]: With dead ends: 56 [2023-04-01 02:42:18,997 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 02:42:18,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-04-01 02:42:18,999 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:19,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:42:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 02:42:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-04-01 02:42:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 02:42:19,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2023-04-01 02:42:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:19,006 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 02:42:19,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 02:42:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 02:42:19,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:19,007 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:19,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:19,212 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 [2023-04-01 02:42:19,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:19,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 175052189, now seen corresponding path program 3 times [2023-04-01 02:42:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633022279] [2023-04-01 02:42:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:42:19,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633022279] [2023-04-01 02:42:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633022279] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636565834] [2023-04-01 02:42:19,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:42:19,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:19,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:19,376 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) [2023-04-01 02:42:19,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:42:19,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:42:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:19,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:42:19,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:42:19,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:42:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636565834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571993193] [2023-04-01 02:42:19,566 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:19,566 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:19,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:19,566 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:19,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:19,583 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:19,675 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:19,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:19,696 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:20,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '844#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) 4))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |v_main_~#a~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:20,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:20,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:20,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-04-01 02:42:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121010408] [2023-04-01 02:42:20,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 02:42:20,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 02:42:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 02:42:20,074 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:20,213 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2023-04-01 02:42:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 02:42:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 02:42:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:20,214 INFO L225 Difference]: With dead ends: 89 [2023-04-01 02:42:20,214 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 02:42:20,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 02:42:20,215 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:20,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:42:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 02:42:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2023-04-01 02:42:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-04-01 02:42:20,223 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 24 [2023-04-01 02:42:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:20,223 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-04-01 02:42:20,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-04-01 02:42:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 02:42:20,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:20,224 INFO L195 NwaCegarLoop]: trace histogram [19, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:20,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:20,430 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 [2023-04-01 02:42:20,430 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:20,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 234996813, now seen corresponding path program 4 times [2023-04-01 02:42:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:20,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702341012] [2023-04-01 02:42:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 02:42:20,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702341012] [2023-04-01 02:42:20,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702341012] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024117896] [2023-04-01 02:42:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:42:20,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:20,773 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) [2023-04-01 02:42:20,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:42:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:20,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 02:42:20,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:42:21,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:42:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024117896] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204841383] [2023-04-01 02:42:21,386 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:21,386 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:21,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:21,387 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:21,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:21,408 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:21,509 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:21,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:21,529 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:21,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1384#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:21,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:21,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:21,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 22] total 47 [2023-04-01 02:42:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099409081] [2023-04-01 02:42:21,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:21,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-01 02:42:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-01 02:42:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1207, Invalid=2099, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 02:42:21,929 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:22,197 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2023-04-01 02:42:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 02:42:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 02:42:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:22,201 INFO L225 Difference]: With dead ends: 152 [2023-04-01 02:42:22,201 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 02:42:22,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1207, Invalid=2099, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 02:42:22,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:22,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 47 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:42:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 02:42:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 78. [2023-04-01 02:42:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-04-01 02:42:22,227 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 41 [2023-04-01 02:42:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:22,227 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-04-01 02:42:22,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-04-01 02:42:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 02:42:22,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:22,230 INFO L195 NwaCegarLoop]: trace histogram [44, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:22,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:22,435 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 [2023-04-01 02:42:22,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:22,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1065544483, now seen corresponding path program 5 times [2023-04-01 02:42:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551061958] [2023-04-01 02:42:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-04-01 02:42:23,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551061958] [2023-04-01 02:42:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551061958] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930703003] [2023-04-01 02:42:23,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:42:23,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:23,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:23,138 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) [2023-04-01 02:42:23,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:42:27,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-04-01 02:42:27,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:27,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 02:42:27,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-04-01 02:42:27,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-04-01 02:42:28,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930703003] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748937301] [2023-04-01 02:42:28,302 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:28,303 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:28,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:28,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:28,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:28,324 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:28,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:28,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:28,416 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:28,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2299#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#b~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_5|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:28,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:28,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:28,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-04-01 02:42:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416721174] [2023-04-01 02:42:28,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 02:42:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 02:42:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=1715, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 02:42:28,836 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:29,226 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2023-04-01 02:42:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 02:42:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 02:42:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:29,230 INFO L225 Difference]: With dead ends: 219 [2023-04-01 02:42:29,230 INFO L226 Difference]: Without dead ends: 210 [2023-04-01 02:42:29,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=937, Invalid=1715, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 02:42:29,231 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:29,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 65 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:42:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-04-01 02:42:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 98. [2023-04-01 02:42:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2023-04-01 02:42:29,256 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 74 [2023-04-01 02:42:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:29,256 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2023-04-01 02:42:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2023-04-01 02:42:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 02:42:29,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:29,263 INFO L195 NwaCegarLoop]: trace histogram [44, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:29,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 02:42:29,473 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 [2023-04-01 02:42:29,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:29,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1880120733, now seen corresponding path program 6 times [2023-04-01 02:42:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:29,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231234054] [2023-04-01 02:42:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-04-01 02:42:31,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231234054] [2023-04-01 02:42:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231234054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557900342] [2023-04-01 02:42:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:42:31,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:31,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:42:31,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:42:31,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:42:31,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:31,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 02:42:31,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2023-04-01 02:42:31,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2023-04-01 02:42:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557900342] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988125114] [2023-04-01 02:42:33,648 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:33,648 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:33,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:33,649 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:33,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:33,669 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:33,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:33,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:33,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:34,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3565#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int) (|v_main_~#b~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_6|) 4))) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_6|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:34,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:34,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:34,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 47, 47] total 117 [2023-04-01 02:42:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693916036] [2023-04-01 02:42:34,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:34,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-04-01 02:42:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-04-01 02:42:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7052, Invalid=9204, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 02:42:34,280 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:35,690 INFO L93 Difference]: Finished difference Result 394 states and 537 transitions. [2023-04-01 02:42:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-04-01 02:42:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2023-04-01 02:42:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:35,692 INFO L225 Difference]: With dead ends: 394 [2023-04-01 02:42:35,692 INFO L226 Difference]: Without dead ends: 346 [2023-04-01 02:42:35,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7740 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7052, Invalid=9204, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 02:42:35,696 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 287 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:35,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 65 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 02:42:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-01 02:42:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 184. [2023-04-01 02:42:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2023-04-01 02:42:35,713 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 94 [2023-04-01 02:42:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:35,713 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2023-04-01 02:42:35,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2023-04-01 02:42:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-01 02:42:35,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:35,715 INFO L195 NwaCegarLoop]: trace histogram [114, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:35,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:35,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:35,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:35,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:35,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2023800477, now seen corresponding path program 7 times [2023-04-01 02:42:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389954716] [2023-04-01 02:42:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2023-04-01 02:42:38,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389954716] [2023-04-01 02:42:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389954716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416874234] [2023-04-01 02:42:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:42:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:38,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:42:38,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:42:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:39,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 116 conjunts are in the unsatisfiable core [2023-04-01 02:42:39,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2023-04-01 02:42:40,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2023-04-01 02:42:48,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416874234] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88812235] [2023-04-01 02:42:48,951 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:48,951 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:48,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:48,952 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:48,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:48,974 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:42:49,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:42:49,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:42:49,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:49,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5985#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_7| Int) (|v_main_~#b~0.base_BEFORE_CALL_7| Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_7|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_7|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |v_main_~#a~0.base_BEFORE_CALL_7|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:49,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:49,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 117, 117] total 250 [2023-04-01 02:42:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111084845] [2023-04-01 02:42:49,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 250 states [2023-04-01 02:42:49,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2023-04-01 02:42:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31657, Invalid=36203, Unknown=0, NotChecked=0, Total=67860 [2023-04-01 02:42:49,693 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 250 states, 250 states have (on average 1.188) internal successors, (297), 250 states have internal predecessors, (297), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:57,408 INFO L93 Difference]: Finished difference Result 701 states and 970 transitions. [2023-04-01 02:42:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-04-01 02:42:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 250 states, 250 states have (on average 1.188) internal successors, (297), 250 states have internal predecessors, (297), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2023-04-01 02:42:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:57,412 INFO L225 Difference]: With dead ends: 701 [2023-04-01 02:42:57,412 INFO L226 Difference]: Without dead ends: 637 [2023-04-01 02:42:57,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34254 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=31657, Invalid=36203, Unknown=0, NotChecked=0, Total=67860 [2023-04-01 02:42:57,416 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 467 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:57,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 56 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 02:42:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-04-01 02:42:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 357. [2023-04-01 02:42:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 351 states have (on average 1.0085470085470085) internal successors, (354), 351 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:42:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2023-04-01 02:42:57,447 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 180 [2023-04-01 02:42:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:57,448 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2023-04-01 02:42:57,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 250 states, 250 states have (on average 1.188) internal successors, (297), 250 states have internal predecessors, (297), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:42:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2023-04-01 02:42:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-04-01 02:42:57,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:57,451 INFO L195 NwaCegarLoop]: trace histogram [247, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:57,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 02:42:57,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:42:57,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:57,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1798687475, now seen corresponding path program 8 times [2023-04-01 02:42:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:57,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070847104] [2023-04-01 02:42:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 35093 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 30628 trivial. 0 not checked. [2023-04-01 02:43:05,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:05,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070847104] [2023-04-01 02:43:05,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070847104] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:05,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889719659] [2023-04-01 02:43:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:43:05,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:05,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:05,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process