/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:41:35,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:41:35,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:41:35,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 02:41:35,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:41:35,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:41:35,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:41:35,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:41:35,703 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:41:35,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:41:35,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:41:35,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:41:35,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:41:35,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:41:35,705 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:41:35,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:41:35,705 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:41:35,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:41:35,706 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:41:35,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:41:35,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:41:35,706 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:41:35,706 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:41:35,706 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:41:35,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:41:35,707 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:41:35,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:41:35,708 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:41:35,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:41:35,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:41:35,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:41:35,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:41:35,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:35,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:41:35,710 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:41:35,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:41:35,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:41:35,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:41:35,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:41:35,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:41:35,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:41:35,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:41:35,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:41:35,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:41:35,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:41:35,984 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:41:35,985 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:41:35,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-04-01 02:41:37,106 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:41:37,296 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:41:37,297 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-04-01 02:41:37,304 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311a5a379/4afb3a890f9947dcba84b876b580e34a/FLAG2de934d25 [2023-04-01 02:41:37,326 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311a5a379/4afb3a890f9947dcba84b876b580e34a [2023-04-01 02:41:37,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:41:37,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:41:37,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:37,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:41:37,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:41:37,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37, skipping insertion in model container [2023-04-01 02:41:37,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:41:37,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:41:37,480 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-04-01 02:41:37,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:37,492 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:41:37,506 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-04-01 02:41:37,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:37,519 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:41:37,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37 WrapperNode [2023-04-01 02:41:37,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:37,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:41:37,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:41:37,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:41:37,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:41:37,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:41:37,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:41:37,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:41:37,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (1/1) ... [2023-04-01 02:41:37,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:37,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:41:37,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:41:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:41:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:41:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:41:37,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:41:37,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:41:37,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:41:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:41:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:41:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:41:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:41:37,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:41:37,663 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:41:37,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:41:37,779 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:41:37,801 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:41:37,801 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 02:41:37,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:37 BoogieIcfgContainer [2023-04-01 02:41:37,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:41:37,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:41:37,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:41:37,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:41:37,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:41:37" (1/3) ... [2023-04-01 02:41:37,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478dbe6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:37, skipping insertion in model container [2023-04-01 02:41:37,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:37" (2/3) ... [2023-04-01 02:41:37,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478dbe6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:37, skipping insertion in model container [2023-04-01 02:41:37,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:37" (3/3) ... [2023-04-01 02:41:37,811 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-04-01 02:41:37,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:41:37,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:41:37,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:41:37,890 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;@42358607, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:41:37,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:41:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 02:41:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:41:37,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:37,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:37,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:37,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 174780321, now seen corresponding path program 1 times [2023-04-01 02:41:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961410352] [2023-04-01 02:41:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:37,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:41:38,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:38,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961410352] [2023-04-01 02:41:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961410352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394482219] [2023-04-01 02:41:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:38,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:38,268 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 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 02:41:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:38,297 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-04-01 02:41:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:38,300 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 02:41:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:38,306 INFO L225 Difference]: With dead ends: 29 [2023-04-01 02:41:38,307 INFO L226 Difference]: Without dead ends: 14 [2023-04-01 02:41:38,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:38,312 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:38,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-01 02:41:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-01 02:41:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 02:41:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-01 02:41:38,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-01 02:41:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:38,346 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-01 02:41:38,346 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 02:41:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-01 02:41:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:41:38,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:38,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:41:38,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:38,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1562780666, now seen corresponding path program 1 times [2023-04-01 02:41:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:38,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074594666] [2023-04-01 02:41:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:38,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:41:38,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074594666] [2023-04-01 02:41:38,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074594666] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764876900] [2023-04-01 02:41:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:38,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:38,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:38,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:38,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:41:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:38,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:38,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:41:38,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:41:38,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764876900] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839352925] [2023-04-01 02:41:38,605 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:38,605 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:38,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:38,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:38,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:38,714 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:39,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:39,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:40,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1839352925] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:40,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:40,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4, 4] total 17 [2023-04-01 02:41:40,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089744733] [2023-04-01 02:41:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 02:41:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 02:41:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:40,047 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 02:41:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:41,070 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-04-01 02:41:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:41:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) Word has length 13 [2023-04-01 02:41:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:41,071 INFO L225 Difference]: With dead ends: 19 [2023-04-01 02:41:41,071 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 02:41:41,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:41:41,073 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:41,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 5 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 02:41:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 02:41:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 02:41:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 02:41:41,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-04-01 02:41:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:41,081 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 02:41:41,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 02:41:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 02:41:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 02:41:41,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:41,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:41,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:41,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:41,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:41,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1404245353, now seen corresponding path program 1 times [2023-04-01 02:41:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:41,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902867199] [2023-04-01 02:41:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:41,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902867199] [2023-04-01 02:41:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902867199] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031459042] [2023-04-01 02:41:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:41,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:41,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:41,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:41,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:41:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:41,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:41,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:41,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031459042] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:41,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543790176] [2023-04-01 02:41:41,460 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:41,461 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:41,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:41,461 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:41,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:41,504 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:41,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:41,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:42,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '332#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:42,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:42,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:42,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:42,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964737410] [2023-04-01 02:41:42,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:42,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:42,801 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 02:41:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:42,830 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-04-01 02:41:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 15 [2023-04-01 02:41:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:42,831 INFO L225 Difference]: With dead ends: 28 [2023-04-01 02:41:42,831 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 02:41:42,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:41:42,833 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:42,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 02:41:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 02:41:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 02:41:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 02:41:42,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-04-01 02:41:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:42,842 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 02:41:42,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 02:41:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 02:41:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:41:42,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:42,843 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:42,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 02:41:43,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:41:43,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:43,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1124020348, now seen corresponding path program 2 times [2023-04-01 02:41:43,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:43,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039253025] [2023-04-01 02:41:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:43,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039253025] [2023-04-01 02:41:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039253025] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772397100] [2023-04-01 02:41:43,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:43,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:43,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:43,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:41:43,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:41:43,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:43,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 02:41:43,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:43,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:41:43,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:41:43,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-04-01 02:41:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:43,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:43,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 02:41:43,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-04-01 02:41:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:41:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772397100] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986870612] [2023-04-01 02:41:43,416 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:43,416 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:43,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:43,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:43,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:43,444 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:43,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:43,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:44,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '534#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:44,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:44,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-04-01 02:41:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565495497] [2023-04-01 02:41:44,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:44,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 02:41:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 02:41:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-04-01 02:41:44,763 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 02:41:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:44,922 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-04-01 02:41:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 02:41:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 02:41:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:44,923 INFO L225 Difference]: With dead ends: 35 [2023-04-01 02:41:44,923 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 02:41:44,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:41:44,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:44,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 43 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 02:41:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 02:41:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.1) internal successors, (22), 20 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 02:41:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 02:41:44,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2023-04-01 02:41:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:44,934 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 02:41:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 02:41:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 02:41:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 02:41:44,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:44,935 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:44,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:45,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:45,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash 729479343, now seen corresponding path program 3 times [2023-04-01 02:41:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:45,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256596383] [2023-04-01 02:41:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:45,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:45,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256596383] [2023-04-01 02:41:45,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256596383] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:45,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327242164] [2023-04-01 02:41:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:45,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:45,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:41:45,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:45,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:41:45,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:45,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327242164] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632267013] [2023-04-01 02:41:45,411 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:45,411 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:45,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:45,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:45,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:45,441 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:45,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:45,678 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:46,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:46,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:46,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:46,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-01 02:41:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850508382] [2023-04-01 02:41:46,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 02:41:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 02:41:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:41:46,597 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 02:41:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:46,632 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-04-01 02:41:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:41:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 23 [2023-04-01 02:41:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:46,633 INFO L225 Difference]: With dead ends: 44 [2023-04-01 02:41:46,633 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 02:41:46,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:41:46,634 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:46,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 02:41:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 02:41:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 02:41:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 02:41:46,644 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2023-04-01 02:41:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:46,644 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 02:41:46,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 02:41:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 02:41:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:41:46,645 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:46,645 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:46,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:46,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:46,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2056148726, now seen corresponding path program 4 times [2023-04-01 02:41:46,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15474812] [2023-04-01 02:41:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:47,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15474812] [2023-04-01 02:41:47,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15474812] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108584927] [2023-04-01 02:41:47,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:47,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:47,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:41:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:47,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 02:41:47,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:47,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:47,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108584927] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896010929] [2023-04-01 02:41:47,423 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:47,423 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:47,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:47,424 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:47,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:47,446 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:47,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:47,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:48,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1132#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:48,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:48,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:48,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-01 02:41:48,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853739236] [2023-04-01 02:41:48,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 02:41:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 02:41:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1033, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 02:41:48,688 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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 02:41:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:48,735 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-04-01 02:41:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 02:41:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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 30 [2023-04-01 02:41:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:48,737 INFO L225 Difference]: With dead ends: 58 [2023-04-01 02:41:48,738 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 02:41:48,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=1033, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 02:41:48,739 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:48,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 02:41:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 02:41:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 02:41:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-04-01 02:41:48,755 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 30 [2023-04-01 02:41:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:48,756 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-04-01 02:41:48,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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 02:41:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-04-01 02:41:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 02:41:48,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:48,757 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:48,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:48,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:48,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1679909226, now seen corresponding path program 5 times [2023-04-01 02:41:48,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:48,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981993853] [2023-04-01 02:41:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:48,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:41:49,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981993853] [2023-04-01 02:41:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981993853] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410828144] [2023-04-01 02:41:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:49,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:49,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:41:49,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 02:41:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:49,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 02:41:49,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:49,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:41:49,944 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-04-01 02:41:49,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 55 [2023-04-01 02:41:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-04-01 02:41:50,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:50,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-04-01 02:41:50,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:41:50,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2023-04-01 02:41:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-04-01 02:41:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410828144] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11719339] [2023-04-01 02:41:50,546 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:50,546 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:50,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:50,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:50,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:50,611 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:50,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:50,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:52,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1626#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:52,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:52,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:52,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11] total 46 [2023-04-01 02:41:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627361229] [2023-04-01 02:41:52,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 02:41:52,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 02:41:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 02:41:52,198 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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 02:41:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:52,901 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-04-01 02:41:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 02:41:52,902 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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 44 [2023-04-01 02:41:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:52,903 INFO L225 Difference]: With dead ends: 71 [2023-04-01 02:41:52,903 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 02:41:52,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=696, Invalid=3860, Unknown=0, NotChecked=0, Total=4556 [2023-04-01 02:41:52,905 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:52,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 02:41:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 02:41:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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 02:41:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-04-01 02:41:52,925 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2023-04-01 02:41:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:52,929 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-04-01 02:41:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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 02:41:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-04-01 02:41:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 02:41:52,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:52,934 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:52,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:53,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:53,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:53,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash -764380709, now seen corresponding path program 6 times [2023-04-01 02:41:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:53,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630043762] [2023-04-01 02:41:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:41:53,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630043762] [2023-04-01 02:41:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630043762] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366181219] [2023-04-01 02:41:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:53,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:53,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:53,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:41:53,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:53,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:53,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 02:41:53,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:41:53,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:41:54,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366181219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969714429] [2023-04-01 02:41:54,834 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:41:54,834 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:54,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:54,835 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:54,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:54,855 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:41:55,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:41:55,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:56,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2243#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:41:56,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:56,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-04-01 02:41:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132370076] [2023-04-01 02:41:56,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-04-01 02:41:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-04-01 02:41:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1761, Invalid=3069, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 02:41:56,037 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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 02:41:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:56,139 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2023-04-01 02:41:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 02:41:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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 53 [2023-04-01 02:41:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:56,144 INFO L225 Difference]: With dead ends: 104 [2023-04-01 02:41:56,144 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 02:41:56,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1761, Invalid=3069, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 02:41:56,146 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:56,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 02:41:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-04-01 02:41:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 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 02:41:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2023-04-01 02:41:56,188 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 53 [2023-04-01 02:41:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:56,188 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2023-04-01 02:41:56,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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 02:41:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2023-04-01 02:41:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 02:41:56,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:56,198 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:56,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:41:56,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:56,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:56,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2041574442, now seen corresponding path program 7 times [2023-04-01 02:41:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:56,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763798007] [2023-04-01 02:41:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:41:58,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763798007] [2023-04-01 02:41:58,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763798007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539340662] [2023-04-01 02:41:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:58,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:41:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:41:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:58,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 02:41:58,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:41:58,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:42:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539340662] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352167474] [2023-04-01 02:42:01,886 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:01,886 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:01,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:01,886 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:01,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:01,909 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:42:02,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:42:02,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:03,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3193#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:03,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:03,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:03,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2023-04-01 02:42:03,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488400436] [2023-04-01 02:42:03,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:03,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-04-01 02:42:03,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-04-01 02:42:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6836, Invalid=9420, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 02:42:03,307 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 02:42:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:03,563 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2023-04-01 02:42:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-04-01 02:42:03,563 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 82 [2023-04-01 02:42:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:03,564 INFO L225 Difference]: With dead ends: 162 [2023-04-01 02:42:03,564 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 02:42:03,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6836, Invalid=9420, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 02:42:03,569 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:03,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:42:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 02:42:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-04-01 02:42:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 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 02:42:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-04-01 02:42:03,634 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 82 [2023-04-01 02:42:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:03,635 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-04-01 02:42:03,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 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 02:42:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-04-01 02:42:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 02:42:03,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:03,637 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:03,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:42:03,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:42:03,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:03,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1403679222, now seen corresponding path program 8 times [2023-04-01 02:42:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943576354] [2023-04-01 02:42:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 02:42:11,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943576354] [2023-04-01 02:42:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943576354] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299493462] [2023-04-01 02:42:11,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:42:11,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:11,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:42:11,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:42:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 02:42:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:11,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 02:42:11,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:11,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:42:12,811 INFO L321 Elim1Store]: treesize reduction 24, result has 82.7 percent of original size [2023-04-01 02:42:12,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 145 [2023-04-01 02:42:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2023-04-01 02:42:13,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:42:15,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 102 [2023-04-01 02:42:15,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:42:15,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 164 [2023-04-01 02:42:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2023-04-01 02:42:15,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299493462] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:42:15,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607816577] [2023-04-01 02:42:15,320 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:42:15,321 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:42:15,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:42:15,321 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:42:15,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:42:15,341 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 02:42:15,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:42:15,541 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:42:17,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4756#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (<= (+ |#StackHeapBarrier| 1) |main_~#main__a~0.base|) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (<= main_~main__pos~0 99999) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:42:17,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:42:17,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:42:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 19, 19] total 150 [2023-04-01 02:42:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551273208] [2023-04-01 02:42:17,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:42:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2023-04-01 02:42:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:42:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2023-04-01 02:42:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7099, Invalid=18661, Unknown=0, NotChecked=0, Total=25760 [2023-04-01 02:42:17,746 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 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 02:42:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:42:23,197 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2023-04-01 02:42:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-04-01 02:42:23,197 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 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 140 [2023-04-01 02:42:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:42:23,198 INFO L225 Difference]: With dead ends: 187 [2023-04-01 02:42:23,199 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 02:42:23,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6746 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=7701, Invalid=27081, Unknown=0, NotChecked=0, Total=34782 [2023-04-01 02:42:23,202 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:42:23,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 115 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:42:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 02:42:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-04-01 02:42:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 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 02:42:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2023-04-01 02:42:23,240 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 140 [2023-04-01 02:42:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:42:23,240 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2023-04-01 02:42:23,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 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 02:42:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2023-04-01 02:42:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 02:42:23,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:42:23,242 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:42:23,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 02:42:23,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:42:23,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:42:23,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:42:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1173968269, now seen corresponding path program 9 times [2023-04-01 02:42:23,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:42:23,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060528193] [2023-04-01 02:42:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:42:23,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:42:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-04-01 02:42:30,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:30,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060528193] [2023-04-01 02:42:30,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060528193] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:30,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719721776] [2023-04-01 02:42:30,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:42:30,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:30,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:30,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:42:30,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:42:30,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:42:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:42:30,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 117 conjunts are in the unsatisfiable core [2023-04-01 02:42:30,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:42:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-04-01 02:42:30,824 INFO L327 TraceCheckSpWp]: Computing backward predicates...