/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/loop-simple/nested_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:08:13,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:08:13,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:08:14,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:08:14,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:08:14,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:08:14,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:08:14,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:08:14,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:08:14,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:08:14,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:08:14,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:08:14,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:08:14,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:08:14,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:08:14,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:08:14,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:08:14,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:08:14,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:08:14,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:08:14,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:08:14,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:08:14,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:08:14,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:08:14,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:08:14,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:08:14,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:08:14,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:08:14,062 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 05:08:14,086 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:08:14,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:08:14,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:08:14,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:08:14,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:08:14,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:08:14,087 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:08:14,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:08:14,087 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:08:14,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:08:14,088 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:08:14,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:08:14,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:08:14,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:08:14,088 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:08:14,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:08:14,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:08:14,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:08:14,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:08:14,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:08:14,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:08:14,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:08:14,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:08:14,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:08:14,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:08:14,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:08:14,305 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:08:14,306 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:08:14,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_6.c [2023-04-01 05:08:15,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:08:15,441 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:08:15,442 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_6.c [2023-04-01 05:08:15,446 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b2f3713/9fb13908cb584065bc99908dcf9f011e/FLAG81b2bd7c7 [2023-04-01 05:08:15,462 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b2f3713/9fb13908cb584065bc99908dcf9f011e [2023-04-01 05:08:15,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:08:15,466 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:08:15,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:08:15,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:08:15,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:08:15,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a3f163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15, skipping insertion in model container [2023-04-01 05:08:15,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:08:15,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:08:15,610 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/loop-simple/nested_6.c[959,972] [2023-04-01 05:08:15,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:08:15,622 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:08:15,637 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/loop-simple/nested_6.c[959,972] [2023-04-01 05:08:15,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:08:15,650 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:08:15,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15 WrapperNode [2023-04-01 05:08:15,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:08:15,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:08:15,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:08:15,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:08:15,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:08:15,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:08:15,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:08:15,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:08:15,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (1/1) ... [2023-04-01 05:08:15,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:08:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:15,731 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 05:08:15,757 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 05:08:15,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:08:15,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:08:15,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:08:15,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:08:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:08:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:08:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:08:15,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:08:15,825 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:08:15,826 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:08:15,912 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:08:15,953 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:08:15,954 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 05:08:15,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:08:15 BoogieIcfgContainer [2023-04-01 05:08:15,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:08:15,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:08:15,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:08:15,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:08:15,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:08:15" (1/3) ... [2023-04-01 05:08:15,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53811b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:08:15, skipping insertion in model container [2023-04-01 05:08:15,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:08:15" (2/3) ... [2023-04-01 05:08:15,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53811b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:08:15, skipping insertion in model container [2023-04-01 05:08:15,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:08:15" (3/3) ... [2023-04-01 05:08:15,962 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2023-04-01 05:08:15,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:08:15,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:08:16,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:08:16,033 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;@4765f437, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:08:16,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:08:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:08:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-04-01 05:08:16,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1670592332, now seen corresponding path program 1 times [2023-04-01 05:08:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416513477] [2023-04-01 05:08:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,224 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 05:08:16,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416513477] [2023-04-01 05:08:16,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416513477] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791696269] [2023-04-01 05:08:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,250 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,290 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2023-04-01 05:08:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-04-01 05:08:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,329 INFO L225 Difference]: With dead ends: 31 [2023-04-01 05:08:16,329 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,337 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:16,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-04-01 05:08:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-04-01 05:08:16,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 8 [2023-04-01 05:08:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,364 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-04-01 05:08:16,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-04-01 05:08:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 05:08:16,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:08:16,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -960916720, now seen corresponding path program 1 times [2023-04-01 05:08:16,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649602586] [2023-04-01 05:08:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649602586] [2023-04-01 05:08:16,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649602586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793403419] [2023-04-01 05:08:16,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,424 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,462 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2023-04-01 05:08:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 05:08:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,463 INFO L225 Difference]: With dead ends: 29 [2023-04-01 05:08:16,463 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,464 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:16,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-04-01 05:08:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-04-01 05:08:16,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2023-04-01 05:08:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,468 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-04-01 05:08:16,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-04-01 05:08:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 05:08:16,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:08:16,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1863239549, now seen corresponding path program 1 times [2023-04-01 05:08:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022936415] [2023-04-01 05:08:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022936415] [2023-04-01 05:08:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022936415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046500045] [2023-04-01 05:08:16,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,522 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,542 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2023-04-01 05:08:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,543 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 05:08:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,544 INFO L225 Difference]: With dead ends: 30 [2023-04-01 05:08:16,544 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,546 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:16,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-04-01 05:08:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-04-01 05:08:16,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2023-04-01 05:08:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,566 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-04-01 05:08:16,567 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-04-01 05:08:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:08:16,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:08:16,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1683393226, now seen corresponding path program 1 times [2023-04-01 05:08:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534616050] [2023-04-01 05:08:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534616050] [2023-04-01 05:08:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534616050] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040381152] [2023-04-01 05:08:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,649 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,674 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2023-04-01 05:08:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 05:08:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,675 INFO L225 Difference]: With dead ends: 31 [2023-04-01 05:08:16,675 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,676 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:16,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-04-01 05:08:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-04-01 05:08:16,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 14 [2023-04-01 05:08:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,680 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-04-01 05:08:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-04-01 05:08:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 05:08:16,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:08:16,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1710515300, now seen corresponding path program 1 times [2023-04-01 05:08:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403651846] [2023-04-01 05:08:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403651846] [2023-04-01 05:08:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403651846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916203628] [2023-04-01 05:08:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,764 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,791 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2023-04-01 05:08:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 05:08:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,792 INFO L225 Difference]: With dead ends: 32 [2023-04-01 05:08:16,792 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,793 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:16,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-04-01 05:08:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-04-01 05:08:16,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2023-04-01 05:08:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,797 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-04-01 05:08:16,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-04-01 05:08:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 05:08:16,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:08:16,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1524451, now seen corresponding path program 1 times [2023-04-01 05:08:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94478647] [2023-04-01 05:08:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94478647] [2023-04-01 05:08:16,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94478647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:16,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383716626] [2023-04-01 05:08:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:16,858 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:16,887 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-04-01 05:08:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 05:08:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:16,888 INFO L225 Difference]: With dead ends: 33 [2023-04-01 05:08:16,888 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 05:08:16,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 05:08:16,889 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 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 05:08:16,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 05:08:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 05:08:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-04-01 05:08:16,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 18 [2023-04-01 05:08:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:16,893 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-04-01 05:08:16,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-04-01 05:08:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 05:08:16,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:16,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:08:16,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:16,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash 978794784, now seen corresponding path program 1 times [2023-04-01 05:08:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820055223] [2023-04-01 05:08:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:16,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820055223] [2023-04-01 05:08:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820055223] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067207281] [2023-04-01 05:08:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:16,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:16,940 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 05:08:16,942 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 05:08:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:16,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:08:16,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:17,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:08:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067207281] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:17,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170610027] [2023-04-01 05:08:17,043 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:17,043 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:17,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:17,048 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:17,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:17,130 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:18,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:18,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:19,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '665#(and (<= 1 |#StackHeapBarrier|) (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (<= 6 main_~f~0) (= |#NULL.offset| 0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:19,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:19,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:19,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 05:08:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283221598] [2023-04-01 05:08:19,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:19,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:08:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:08:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-04-01 05:08:19,084 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:19,102 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-04-01 05:08:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:08:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 05:08:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:19,105 INFO L225 Difference]: With dead ends: 37 [2023-04-01 05:08:19,105 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 05:08:19,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-04-01 05:08:19,107 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:19,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 05:08:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 05:08:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-01 05:08:19,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2023-04-01 05:08:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:19,114 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-01 05:08:19,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-01 05:08:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 05:08:19,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:19,116 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:19,124 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 05:08:19,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:19,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:19,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1954452957, now seen corresponding path program 2 times [2023-04-01 05:08:19,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16114989] [2023-04-01 05:08:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 05:08:19,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16114989] [2023-04-01 05:08:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16114989] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774235138] [2023-04-01 05:08:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:08:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:19,360 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 05:08:19,388 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 05:08:19,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:08:19,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:08:19,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:08:19,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:08:19,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:08:19,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774235138] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778620661] [2023-04-01 05:08:19,459 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:19,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:19,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:19,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:19,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:19,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:20,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:20,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:20,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '922#(and (<= 1 |#StackHeapBarrier|) (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (<= 6 main_~f~0) (= |#NULL.offset| 0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:20,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:20,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-04-01 05:08:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378806162] [2023-04-01 05:08:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:08:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:08:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-04-01 05:08:20,702 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:20,812 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2023-04-01 05:08:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:08:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 05:08:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:20,815 INFO L225 Difference]: With dead ends: 126 [2023-04-01 05:08:20,816 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 05:08:20,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:08:20,817 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:20,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 05:08:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 89. [2023-04-01 05:08:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2023-04-01 05:08:20,830 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 22 [2023-04-01 05:08:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2023-04-01 05:08:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2023-04-01 05:08:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 05:08:20,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:20,832 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:20,841 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 05:08:21,032 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,SelfDestructingSolverStorable7 [2023-04-01 05:08:21,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:21,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash -675752508, now seen corresponding path program 3 times [2023-04-01 05:08:21,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:21,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257498503] [2023-04-01 05:08:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:21,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 357 proven. 1 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2023-04-01 05:08:21,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:21,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257498503] [2023-04-01 05:08:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257498503] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:21,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160989159] [2023-04-01 05:08:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:08:21,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:21,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:21,122 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 05:08:21,127 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 05:08:21,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:08:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:08:21,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 05:08:21,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 211 proven. 10 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2023-04-01 05:08:21,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 211 proven. 10 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2023-04-01 05:08:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160989159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:21,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209636] [2023-04-01 05:08:21,253 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:21,253 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:21,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:21,253 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:21,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:21,264 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:21,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:21,831 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:22,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1903#(and (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))))' at error location [2023-04-01 05:08:22,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:22,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:22,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2023-04-01 05:08:22,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565775192] [2023-04-01 05:08:22,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:08:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:08:22,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:08:22,117 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:22,265 INFO L93 Difference]: Finished difference Result 327 states and 451 transitions. [2023-04-01 05:08:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 05:08:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2023-04-01 05:08:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:22,267 INFO L225 Difference]: With dead ends: 327 [2023-04-01 05:08:22,267 INFO L226 Difference]: Without dead ends: 245 [2023-04-01 05:08:22,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 244 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:08:22,268 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:22,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-04-01 05:08:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 177. [2023-04-01 05:08:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 173 states have (on average 1.2138728323699421) internal successors, (210), 173 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2023-04-01 05:08:22,286 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 88 [2023-04-01 05:08:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:22,287 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2023-04-01 05:08:22,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2023-04-01 05:08:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 05:08:22,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:22,291 INFO L195 NwaCegarLoop]: trace histogram [96, 16, 16, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:08:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:22,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:22,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash -256749164, now seen corresponding path program 4 times [2023-04-01 05:08:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:22,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577610891] [2023-04-01 05:08:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:22,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6624 backedges. 2510 proven. 1 refuted. 0 times theorem prover too weak. 4113 trivial. 0 not checked. [2023-04-01 05:08:22,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577610891] [2023-04-01 05:08:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577610891] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437748852] [2023-04-01 05:08:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:08:22,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:22,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:22,629 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 05:08:22,671 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 05:08:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:22,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:08:22,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6624 backedges. 1464 proven. 52 refuted. 0 times theorem prover too weak. 5108 trivial. 0 not checked. [2023-04-01 05:08:22,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6624 backedges. 1464 proven. 52 refuted. 0 times theorem prover too weak. 5108 trivial. 0 not checked. [2023-04-01 05:08:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437748852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074855296] [2023-04-01 05:08:22,819 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:22,819 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:22,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:22,820 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:22,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:22,833 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:23,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:23,251 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:23,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3998#(and (<= 1 |#StackHeapBarrier|) (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (<= 6 main_~f~0) (= |#NULL.offset| 0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:23,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:23,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:23,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-04-01 05:08:23,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521074857] [2023-04-01 05:08:23,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:23,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:08:23,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:08:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:08:23,771 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:23,969 INFO L93 Difference]: Finished difference Result 1415 states and 1739 transitions. [2023-04-01 05:08:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 05:08:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2023-04-01 05:08:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:23,973 INFO L225 Difference]: With dead ends: 1415 [2023-04-01 05:08:23,974 INFO L226 Difference]: Without dead ends: 1245 [2023-04-01 05:08:23,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:08:23,976 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:23,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-04-01 05:08:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 841. [2023-04-01 05:08:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.1541218637992832) internal successors, (966), 837 states have internal predecessors, (966), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 969 transitions. [2023-04-01 05:08:24,038 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 969 transitions. Word has length 176 [2023-04-01 05:08:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:24,038 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 969 transitions. [2023-04-01 05:08:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 969 transitions. [2023-04-01 05:08:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2023-04-01 05:08:24,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:24,052 INFO L195 NwaCegarLoop]: trace histogram [576, 96, 96, 16, 16, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:24,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 05:08:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:24,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:24,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash -209810472, now seen corresponding path program 5 times [2023-04-01 05:08:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:24,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972758281] [2023-04-01 05:08:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 232052 backedges. 87175 proven. 1 refuted. 0 times theorem prover too weak. 144876 trivial. 0 not checked. [2023-04-01 05:08:24,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972758281] [2023-04-01 05:08:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972758281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236379977] [2023-04-01 05:08:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:08:24,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:24,789 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 05:08:24,814 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 05:08:25,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 105 check-sat command(s) [2023-04-01 05:08:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:08:25,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:08:25,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 232052 backedges. 50849 proven. 1816 refuted. 0 times theorem prover too weak. 179387 trivial. 0 not checked. [2023-04-01 05:08:25,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 232052 backedges. 50849 proven. 1816 refuted. 0 times theorem prover too weak. 179387 trivial. 0 not checked. [2023-04-01 05:08:25,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236379977] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885154518] [2023-04-01 05:08:25,300 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:25,300 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:25,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:25,301 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:25,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:25,311 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:25,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:25,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:26,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13581#(and (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))))' at error location [2023-04-01 05:08:26,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:26,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:26,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-04-01 05:08:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992999457] [2023-04-01 05:08:26,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:08:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:08:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:08:26,195 INFO L87 Difference]: Start difference. First operand 841 states and 969 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:26,913 INFO L93 Difference]: Finished difference Result 8119 states and 9395 transitions. [2023-04-01 05:08:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 05:08:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 840 [2023-04-01 05:08:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:26,935 INFO L225 Difference]: With dead ends: 8119 [2023-04-01 05:08:26,936 INFO L226 Difference]: Without dead ends: 7285 [2023-04-01 05:08:26,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2535 GetRequests, 2504 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:08:26,942 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:26,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 42 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:08:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7285 states. [2023-04-01 05:08:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7285 to 4865. [2023-04-01 05:08:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4861 states have (on average 1.1442090104916685) internal successors, (5562), 4861 states have internal predecessors, (5562), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 5565 transitions. [2023-04-01 05:08:27,396 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 5565 transitions. Word has length 840 [2023-04-01 05:08:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:27,398 INFO L495 AbstractCegarLoop]: Abstraction has 4865 states and 5565 transitions. [2023-04-01 05:08:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 5565 transitions. [2023-04-01 05:08:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4865 [2023-04-01 05:08:27,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:27,632 INFO L195 NwaCegarLoop]: trace histogram [3456, 576, 576, 96, 96, 16, 16, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:27,637 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 05:08:27,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 05:08:27,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:27,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1518458708, now seen corresponding path program 6 times [2023-04-01 05:08:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:27,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544363959] [2023-04-01 05:08:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:27,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8358520 backedges. 1828954 proven. 65320 refuted. 0 times theorem prover too weak. 6464246 trivial. 0 not checked. [2023-04-01 05:08:35,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544363959] [2023-04-01 05:08:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544363959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462458690] [2023-04-01 05:08:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:08:35,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:35,845 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 05:08:35,846 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 05:08:37,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:08:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:08:37,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 14598 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:08:37,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8358520 backedges. 1828954 proven. 65320 refuted. 0 times theorem prover too weak. 6464246 trivial. 0 not checked. [2023-04-01 05:08:38,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8358520 backedges. 1828954 proven. 65320 refuted. 0 times theorem prover too weak. 6464246 trivial. 0 not checked. [2023-04-01 05:08:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462458690] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195383760] [2023-04-01 05:08:39,801 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 05:08:39,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:39,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:39,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:39,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:39,813 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:40,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:40,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:41,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68763#(and (<= 1 |#StackHeapBarrier|) (<= 6 main_~c~0) (<= 6 main_~d~0) (<= 6 main_~b~0) (<= 6 main_~e~0) (<= 6 main_~a~0) (<= 6 main_~f~0) (= |#NULL.offset| 0) (or (not (= main_~f~0 6)) (not (= main_~c~0 6)) (not (= main_~d~0 6)) (not (= main_~e~0 6)) (not (= main_~b~0 6)) (not (= main_~a~0 6))) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:41,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:41,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 05:08:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193368649] [2023-04-01 05:08:41,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:08:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:08:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:08:41,955 INFO L87 Difference]: Start difference. First operand 4865 states and 5565 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:43,307 INFO L93 Difference]: Finished difference Result 18782 states and 21503 transitions. [2023-04-01 05:08:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:08:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 4864 [2023-04-01 05:08:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:43,348 INFO L225 Difference]: With dead ends: 18782 [2023-04-01 05:08:43,349 INFO L226 Difference]: Without dead ends: 14529 [2023-04-01 05:08:43,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14596 GetRequests, 14578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:08:43,359 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:43,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14529 states. [2023-04-01 05:08:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14529 to 14529. [2023-04-01 05:08:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14529 states, 14525 states have (on average 1.1429948364888123) internal successors, (16602), 14525 states have internal predecessors, (16602), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14529 states to 14529 states and 16605 transitions. [2023-04-01 05:08:44,704 INFO L78 Accepts]: Start accepts. Automaton has 14529 states and 16605 transitions. Word has length 4864 [2023-04-01 05:08:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:44,706 INFO L495 AbstractCegarLoop]: Abstraction has 14529 states and 16605 transitions. [2023-04-01 05:08:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 14529 states and 16605 transitions. [2023-04-01 05:08:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14529 [2023-04-01 05:08:45,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:45,920 INFO L195 NwaCegarLoop]: trace histogram [10368, 1728, 1728, 288, 288, 48, 48, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:45,944 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 05:08:46,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:46,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:46,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 463592052, now seen corresponding path program 7 times [2023-04-01 05:08:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650319968] [2023-04-01 05:08:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:09:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat