/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_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:41:05,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:41:05,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:41:05,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:41:05,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:41:05,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:41:05,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:41:05,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:41:05,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:41:05,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:41:05,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:41:05,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:41:05,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:41:05,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:41:05,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:41:05,562 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 02:41:05,583 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:41:05,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:41:05,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:41:05,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:41:05,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:41:05,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:41:05,585 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:41:05,585 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:41:05,585 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:41:05,585 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:41:05,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:41:05,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:41:05,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:41:05,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:41:05,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:41:05,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:05,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:41:05,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:41:05,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:41:05,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:41:05,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:41:05,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:41:05,792 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:41:05,793 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:41:05,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-04-01 02:41:06,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:41:07,042 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:41:07,042 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-04-01 02:41:07,046 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57b81014/81a4dea2a2744ba49a15d065cbac9a1b/FLAG472d79fc4 [2023-04-01 02:41:07,058 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57b81014/81a4dea2a2744ba49a15d065cbac9a1b [2023-04-01 02:41:07,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:41:07,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:41:07,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:07,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:41:07,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:41:07,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438d629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07, skipping insertion in model container [2023-04-01 02:41:07,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:41:07,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:41:07,201 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_partition_original_ground.i[827,840] [2023-04-01 02:41:07,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:07,221 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:41:07,230 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_partition_original_ground.i[827,840] [2023-04-01 02:41:07,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:07,246 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:41:07,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07 WrapperNode [2023-04-01 02:41:07,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:07,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:41:07,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:41:07,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:41:07,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:41:07,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:41:07,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:41:07,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:41:07,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (1/1) ... [2023-04-01 02:41:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:07,310 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 02:41:07,313 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 02:41:07,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:41:07,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:41:07,343 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:41:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:41:07,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:41:07,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:41:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:41:07,443 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:41:07,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:41:07,644 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:41:07,697 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:41:07,697 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 02:41:07,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:07 BoogieIcfgContainer [2023-04-01 02:41:07,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:41:07,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:41:07,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:41:07,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:41:07,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:41:07" (1/3) ... [2023-04-01 02:41:07,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2f57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:07, skipping insertion in model container [2023-04-01 02:41:07,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:07" (2/3) ... [2023-04-01 02:41:07,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2f57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:07, skipping insertion in model container [2023-04-01 02:41:07,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:07" (3/3) ... [2023-04-01 02:41:07,704 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2023-04-01 02:41:07,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:41:07,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:41:07,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:41:07,760 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;@2c427795, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:41:07,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:41:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:41:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:41:07,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:07,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:07,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:07,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1439992409, now seen corresponding path program 1 times [2023-04-01 02:41:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035796006] [2023-04-01 02:41:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:07,925 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 02:41:07,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035796006] [2023-04-01 02:41:07,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035796006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:07,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:07,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:07,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282047010] [2023-04-01 02:41:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:07,951 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 02:41:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:07,997 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-04-01 02:41:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:08,001 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 02:41:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:08,008 INFO L225 Difference]: With dead ends: 39 [2023-04-01 02:41:08,008 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 02:41:08,010 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 02:41:08,013 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:08,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 02:41:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 02:41:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 02:41:08,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-04-01 02:41:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:08,052 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 02:41:08,052 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 02:41:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 02:41:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:41:08,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:08,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:08,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:41:08,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:08,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1071954370, now seen corresponding path program 1 times [2023-04-01 02:41:08,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:08,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520151807] [2023-04-01 02:41:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:08,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:08,165 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 02:41:08,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:08,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520151807] [2023-04-01 02:41:08,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520151807] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:08,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:08,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715614547] [2023-04-01 02:41:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:08,169 INFO L87 Difference]: Start difference. First operand 20 states and 24 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 02:41:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:08,200 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-01 02:41:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:08,200 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 02:41:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:08,201 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:41:08,201 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:41:08,201 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 02:41:08,202 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:08,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:41:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:41:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 02:41:08,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2023-04-01 02:41:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:08,206 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 02:41:08,207 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 02:41:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 02:41:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:41:08,207 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:08,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:08,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:41:08,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:08,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1315348121, now seen corresponding path program 1 times [2023-04-01 02:41:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:08,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344319697] [2023-04-01 02:41:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:08,264 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 02:41:08,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344319697] [2023-04-01 02:41:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344319697] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63128771] [2023-04-01 02:41:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:08,268 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 02:41:08,269 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 02:41:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:08,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:08,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:08,370 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 02:41:08,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:08,402 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 02:41:08,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63128771] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876369067] [2023-04-01 02:41:08,433 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:08,433 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:08,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:08,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:08,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:08,499 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:08,931 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:08,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:08,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:09,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '293#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_1| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_1| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_1|) |v_main_~#bb~0.offset_BEFORE_CALL_1|) 0)))' at error location [2023-04-01 02:41:09,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:09,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:09,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720014863] [2023-04-01 02:41:09,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:09,163 INFO L87 Difference]: Start difference. First operand 21 states and 25 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 02:41:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:09,187 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-04-01 02:41:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:09,187 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 02:41:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:09,188 INFO L225 Difference]: With dead ends: 38 [2023-04-01 02:41:09,188 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 02:41:09,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:09,189 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:09,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 02:41:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 02:41:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-01 02:41:09,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2023-04-01 02:41:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:09,193 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-01 02:41:09,193 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 02:41:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-01 02:41:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:41:09,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:09,194 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:09,212 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 02:41:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:09,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:09,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -617485986, now seen corresponding path program 2 times [2023-04-01 02:41:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912298644] [2023-04-01 02:41:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:09,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912298644] [2023-04-01 02:41:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912298644] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7092099] [2023-04-01 02:41:09,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:09,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:09,451 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 02:41:09,453 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 02:41:09,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:41:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:09,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:09,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:09,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:09,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7092099] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:09,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636678744] [2023-04-01 02:41:09,535 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:09,535 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:09,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:09,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:09,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:09,553 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:09,815 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:09,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:09,825 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:10,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_2| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_2| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_2|) |v_main_~#bb~0.offset_BEFORE_CALL_2|) 0)))' at error location [2023-04-01 02:41:10,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:10,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:10,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616878487] [2023-04-01 02:41:10,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:10,037 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 02:41:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:10,061 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-04-01 02:41:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 17 [2023-04-01 02:41:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:10,064 INFO L225 Difference]: With dead ends: 39 [2023-04-01 02:41:10,064 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 02:41:10,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:10,065 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:10,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 02:41:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 02:41:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 02:41:10,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2023-04-01 02:41:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:10,069 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 02:41:10,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 02:41:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 02:41:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 02:41:10,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:10,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:10,081 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 02:41:10,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 02:41:10,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:10,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash -913069785, now seen corresponding path program 3 times [2023-04-01 02:41:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:10,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849534673] [2023-04-01 02:41:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:10,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:10,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:10,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849534673] [2023-04-01 02:41:10,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849534673] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:10,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92380105] [2023-04-01 02:41:10,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:10,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:10,445 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 02:41:10,485 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 02:41:10,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:10,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:41:10,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:10,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92380105] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951756634] [2023-04-01 02:41:10,593 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:10,593 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:10,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:10,593 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:10,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:10,607 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:10,833 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:10,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:10,840 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:11,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '759#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_3| Int) (|v_main_~#bb~0.base_BEFORE_CALL_3| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_3|) |v_main_~#bb~0.offset_BEFORE_CALL_3|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:11,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:11,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:11,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 02:41:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493243664] [2023-04-01 02:41:11,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:11,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:41:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:41:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:41:11,025 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 02:41:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:11,066 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-04-01 02:41:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:41:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 20 [2023-04-01 02:41:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:11,069 INFO L225 Difference]: With dead ends: 50 [2023-04-01 02:41:11,069 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:41:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:41:11,072 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:11,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:41:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 02:41:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 02:41:11,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2023-04-01 02:41:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:11,084 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 02:41:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 02:41:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 02:41:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 02:41:11,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:11,085 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:11,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 02:41:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:11,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:11,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1668913607, now seen corresponding path program 4 times [2023-04-01 02:41:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142380764] [2023-04-01 02:41:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:11,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142380764] [2023-04-01 02:41:11,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142380764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518154101] [2023-04-01 02:41:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:11,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:11,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:11,476 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 02:41:11,515 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 02:41:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:11,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:41:11,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:11,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:11,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518154101] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277133646] [2023-04-01 02:41:11,736 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:11,736 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:11,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:11,737 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:11,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:11,748 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:11,949 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:11,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:11,957 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:12,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1090#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_4| Int) (|v_main_~#bb~0.base_BEFORE_CALL_4| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_4|) |v_main_~#bb~0.offset_BEFORE_CALL_4|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:12,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:12,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:12,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:41:12,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384933696] [2023-04-01 02:41:12,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:12,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:41:12,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:41:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:41:12,134 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 02:41:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:12,161 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-04-01 02:41:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:41:12,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 26 [2023-04-01 02:41:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:12,162 INFO L225 Difference]: With dead ends: 62 [2023-04-01 02:41:12,162 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 02:41:12,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:41:12,163 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:12,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 02:41:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 02:41:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-04-01 02:41:12,167 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 26 [2023-04-01 02:41:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:12,167 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-04-01 02:41:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 02:41:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-04-01 02:41:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:41:12,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:12,168 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:12,187 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 02:41:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:12,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:12,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash -143486201, now seen corresponding path program 5 times [2023-04-01 02:41:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487938919] [2023-04-01 02:41:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:12,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:12,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487938919] [2023-04-01 02:41:12,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487938919] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110217672] [2023-04-01 02:41:12,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:12,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:12,828 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 02:41:12,838 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 02:41:12,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:41:12,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:12,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:41:12,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:41:13,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:41:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110217672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305158929] [2023-04-01 02:41:13,137 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:13,137 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:13,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:13,138 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:13,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:13,151 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:13,340 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:13,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:13,346 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:13,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1551#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_5| Int) (|v_main_~#bb~0.base_BEFORE_CALL_5| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_5|) |v_main_~#bb~0.offset_BEFORE_CALL_5|) 0)))' at error location [2023-04-01 02:41:13,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:13,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:13,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 02:41:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057274502] [2023-04-01 02:41:13,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 02:41:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 02:41:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1578, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 02:41:13,648 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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 02:41:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:14,046 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-04-01 02:41:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 02:41:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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 38 [2023-04-01 02:41:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:14,047 INFO L225 Difference]: With dead ends: 69 [2023-04-01 02:41:14,047 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 02:41:14,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1207, Invalid=3349, Unknown=0, NotChecked=0, Total=4556 [2023-04-01 02:41:14,049 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:14,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 02:41:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-01 02:41:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-04-01 02:41:14,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2023-04-01 02:41:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:14,053 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-04-01 02:41:14,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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 02:41:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-04-01 02:41:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 02:41:14,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:14,054 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:14,059 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 02:41:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:14,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:14,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2097914942, now seen corresponding path program 6 times [2023-04-01 02:41:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935028105] [2023-04-01 02:41:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:14,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935028105] [2023-04-01 02:41:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935028105] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35760233] [2023-04-01 02:41:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:14,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:14,714 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 02:41:14,721 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 02:41:14,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:14,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:41:14,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:14,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35760233] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235940464] [2023-04-01 02:41:15,526 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:15,527 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:15,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:15,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:15,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:15,549 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:15,729 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:15,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:15,743 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:15,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2144#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_6| Int) (|v_main_~#bb~0.base_BEFORE_CALL_6| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_6|) |v_main_~#bb~0.offset_BEFORE_CALL_6|) 0)))' at error location [2023-04-01 02:41:15,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:15,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 02:41:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961433789] [2023-04-01 02:41:15,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 02:41:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 02:41:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=2358, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 02:41:15,979 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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 02:41:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:16,070 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2023-04-01 02:41:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 02:41:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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 45 [2023-04-01 02:41:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:16,071 INFO L225 Difference]: With dead ends: 100 [2023-04-01 02:41:16,071 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 02:41:16,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1302, Invalid=2358, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 02:41:16,073 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 02:41:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-04-01 02:41:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-04-01 02:41:16,077 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 45 [2023-04-01 02:41:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:16,078 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-04-01 02:41:16,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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 02:41:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-04-01 02:41:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 02:41:16,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:16,079 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:16,096 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 02:41:16,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:16,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:16,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -757705465, now seen corresponding path program 7 times [2023-04-01 02:41:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:16,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294077540] [2023-04-01 02:41:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:17,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:17,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294077540] [2023-04-01 02:41:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294077540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:17,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294682364] [2023-04-01 02:41:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:17,761 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 02:41:17,789 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 02:41:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:17,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 02:41:17,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:18,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:20,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294682364] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186605148] [2023-04-01 02:41:20,193 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:20,193 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:20,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:20,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:20,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:20,205 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:20,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:20,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:20,449 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:20,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3003#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_7| Int) (|v_main_~#bb~0.base_BEFORE_CALL_7| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_7|) |v_main_~#bb~0.offset_BEFORE_CALL_7|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:20,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:20,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:20,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 02:41:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866025573] [2023-04-01 02:41:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:20,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 02:41:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 02:41:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5077, Invalid=7133, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 02:41:20,768 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 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 02:41:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:20,900 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2023-04-01 02:41:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 02:41:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 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 70 [2023-04-01 02:41:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:20,902 INFO L225 Difference]: With dead ends: 150 [2023-04-01 02:41:20,902 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 02:41:20,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5077, Invalid=7133, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 02:41:20,906 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:20,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 02:41:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 02:41:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-04-01 02:41:20,927 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 70 [2023-04-01 02:41:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:20,929 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-04-01 02:41:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 101 states have internal predecessors, (109), 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 02:41:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-04-01 02:41:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 02:41:20,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:20,933 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:20,940 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 02:41:21,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:21,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:21,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -854788889, now seen corresponding path program 8 times [2023-04-01 02:41:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:21,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923476098] [2023-04-01 02:41:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 02:41:25,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:25,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923476098] [2023-04-01 02:41:25,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923476098] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:25,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220559528] [2023-04-01 02:41:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:25,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:25,503 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 02:41:25,505 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 02:41:26,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 02:41:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:26,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:41:26,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-01 02:41:26,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-01 02:41:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220559528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179550394] [2023-04-01 02:41:27,217 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:27,217 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:27,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:27,219 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:27,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:27,229 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:27,436 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:27,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:27,442 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:27,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4384#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_8| Int) (|v_main_~#bb~0.base_BEFORE_CALL_8| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_8|) |v_main_~#bb~0.offset_BEFORE_CALL_8|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:27,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:27,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:27,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-01 02:41:27,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456145701] [2023-04-01 02:41:27,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:27,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-01 02:41:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-01 02:41:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5374, Invalid=12182, Unknown=0, NotChecked=0, Total=17556 [2023-04-01 02:41:27,987 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 02:41:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:30,594 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2023-04-01 02:41:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-01 02:41:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 120 [2023-04-01 02:41:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:30,595 INFO L225 Difference]: With dead ends: 163 [2023-04-01 02:41:30,595 INFO L226 Difference]: Without dead ends: 140 [2023-04-01 02:41:30,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8720 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=17551, Invalid=36041, Unknown=0, NotChecked=0, Total=53592 [2023-04-01 02:41:30,600 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:30,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 211 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-01 02:41:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-04-01 02:41:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2023-04-01 02:41:30,607 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 120 [2023-04-01 02:41:30,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:30,607 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2023-04-01 02:41:30,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 02:41:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2023-04-01 02:41:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 02:41:30,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:30,608 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:30,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:30,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:41:30,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:30,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1005899198, now seen corresponding path program 9 times [2023-04-01 02:41:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999083523] [2023-04-01 02:41:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:41:35,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:35,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999083523] [2023-04-01 02:41:35,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999083523] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:35,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123953903] [2023-04-01 02:41:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:35,280 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 02:41:35,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:41:35,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:35,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 02:41:35,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:41:35,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:41:42,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123953903] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:42,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933156305] [2023-04-01 02:41:43,000 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:43,000 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:43,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:43,000 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:43,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:43,026 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:43,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:43,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:43,197 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:43,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6173#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_9| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_9| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_9|) |v_main_~#bb~0.offset_BEFORE_CALL_9|) 0)))' at error location [2023-04-01 02:41:43,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:43,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:43,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 02:41:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254081474] [2023-04-01 02:41:43,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:43,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 02:41:43,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 02:41:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20530, Invalid=24626, Unknown=0, NotChecked=0, Total=45156 [2023-04-01 02:41:43,723 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 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 02:41:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:44,022 INFO L93 Difference]: Finished difference Result 276 states and 384 transitions. [2023-04-01 02:41:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 02:41:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 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 133 [2023-04-01 02:41:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:44,025 INFO L225 Difference]: With dead ends: 276 [2023-04-01 02:41:44,025 INFO L226 Difference]: Without dead ends: 241 [2023-04-01 02:41:44,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=20530, Invalid=24626, Unknown=0, NotChecked=0, Total=45156 [2023-04-01 02:41:44,029 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:44,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-01 02:41:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-04-01 02:41:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.017094017094017) internal successors, (238), 234 states have internal predecessors, (238), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 245 transitions. [2023-04-01 02:41:44,066 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 245 transitions. Word has length 133 [2023-04-01 02:41:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:44,067 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 245 transitions. [2023-04-01 02:41:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 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 02:41:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 245 transitions. [2023-04-01 02:41:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 02:41:44,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:44,073 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:44,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:44,280 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:44,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2029231929, now seen corresponding path program 10 times [2023-04-01 02:41:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676636450] [2023-04-01 02:41:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:42:00,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676636450] [2023-04-01 02:42:00,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676636450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876728810] [2023-04-01 02:42:00,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:42:00,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:00,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:42:00,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:42:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:01,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2120 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-01 02:42:01,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 02:42:01,430 INFO L327 TraceCheckSpWp]: Computing backward predicates...