/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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:55:53,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:55:53,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:55:53,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:55:53,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:55:53,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:55:53,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:55:53,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:55:53,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:55:53,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:55:53,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:55:53,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:55:53,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:55:53,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:55:53,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:55:53,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:55:53,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:55:53,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:55:53,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:55:53,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:55:53,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:55:53,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:55:53,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:55:53,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:55:53,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 21:55:53,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:55:53,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:55:53,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:55:53,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:55:53,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:55:53,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:55:53,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:55:53,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:55:53,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:55:53,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:55:53,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:55:53,844 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 [2023-04-02 21:55:53,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:55:53,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:55:53,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:55:53,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:55:53,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:55:53,870 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:55:53,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:55:53,871 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:55:53,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:55:53,872 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:55:53,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:55:53,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:55:53,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:55:53,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:55:53,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:55:53,875 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:55:53,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:55:53,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:55:53,875 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:55:53,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:55:53,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:55:53,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:55:53,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:55:54,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:55:54,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:55:54,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:55:54,071 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:55:54,071 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:55:54,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2023-04-02 21:55:55,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:55:55,263 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:55:55,263 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2023-04-02 21:55:55,267 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a431b2a3/ff3942f9562e4514975bd9a4d653cfad/FLAGcad3d068e [2023-04-02 21:55:55,279 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a431b2a3/ff3942f9562e4514975bd9a4d653cfad [2023-04-02 21:55:55,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:55:55,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:55:55,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:55:55,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:55:55,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:55:55,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b2eb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55, skipping insertion in model container [2023-04-02 21:55:55,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:55:55,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:55:55,410 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/loops/compact.c[609,622] [2023-04-02 21:55:55,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:55:55,421 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:55:55,432 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/loops/compact.c[609,622] [2023-04-02 21:55:55,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:55:55,441 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:55:55,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55 WrapperNode [2023-04-02 21:55:55,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:55:55,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:55:55,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:55:55,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:55:55,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,477 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:55:55,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:55:55,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:55:55,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:55:55,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (1/1) ... [2023-04-02 21:55:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:55:55,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:55,513 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) [2023-04-02 21:55:55,518 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 [2023-04-02 21:55:55,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:55:55,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:55:55,560 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:55:55,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:55:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:55:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:55:55,663 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:55:55,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:55:55,801 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:55:55,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:55:55,847 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 21:55:55,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:55:55 BoogieIcfgContainer [2023-04-02 21:55:55,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:55:55,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:55:55,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:55:55,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:55:55,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:55:55" (1/3) ... [2023-04-02 21:55:55,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709cb7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:55:55, skipping insertion in model container [2023-04-02 21:55:55,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:55:55" (2/3) ... [2023-04-02 21:55:55,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709cb7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:55:55, skipping insertion in model container [2023-04-02 21:55:55,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:55:55" (3/3) ... [2023-04-02 21:55:55,854 INFO L112 eAbstractionObserver]: Analyzing ICFG compact.c [2023-04-02 21:55:55,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:55:55,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:55:55,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:55:55,914 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;@5a6ce152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:55:55,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:55:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2023-04-02 21:55:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-04-02 21:55:55,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:55,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:55,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:55,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 186090600, now seen corresponding path program 1 times [2023-04-02 21:55:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797833670] [2023-04-02 21:55:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:55:56,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:56,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797833670] [2023-04-02 21:55:56,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797833670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:55:56,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:55:56,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:55:56,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020917167] [2023-04-02 21:55:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:55:56,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:55:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:55:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:55:56,109 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:55:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:56,162 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-04-02 21:55:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:55:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-04-02 21:55:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:56,171 INFO L225 Difference]: With dead ends: 27 [2023-04-02 21:55:56,171 INFO L226 Difference]: Without dead ends: 13 [2023-04-02 21:55:56,173 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 [2023-04-02 21:55:56,177 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:56,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:55:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-02 21:55:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-04-02 21:55:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) 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) [2023-04-02 21:55:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-04-02 21:55:56,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-04-02 21:55:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:56,200 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-04-02 21:55:56,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:55:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-04-02 21:55:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 21:55:56,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:56,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:56,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:55:56,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:56,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1093406714, now seen corresponding path program 1 times [2023-04-02 21:55:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788389674] [2023-04-02 21:55:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:56,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:56,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788389674] [2023-04-02 21:55:56,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788389674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:56,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142018046] [2023-04-02 21:55:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:56,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:56,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:56,350 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) [2023-04-02 21:55:56,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:55:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:56,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:55:56,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:56,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:55:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142018046] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405662213] [2023-04-02 21:55:56,467 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 21:55:56,467 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:56,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:56,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:56,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:56,600 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 21:55:56,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 21:55:56,785 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:57,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:57,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:57,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:57,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 21:55:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684315479] [2023-04-02 21:55:57,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:57,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:55:57,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:55:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-02 21:55:57,048 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-04-02 21:55:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:57,103 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-04-02 21:55:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:55:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 11 [2023-04-02 21:55:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:57,104 INFO L225 Difference]: With dead ends: 26 [2023-04-02 21:55:57,104 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 21:55:57,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-02 21:55:57,106 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:57,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:55:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 21:55:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 21:55:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:55:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-02 21:55:57,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2023-04-02 21:55:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:57,114 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-02 21:55:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-04-02 21:55:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-02 21:55:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 21:55:57,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:57,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:57,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 21:55:57,321 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 [2023-04-02 21:55:57,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:57,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:57,323 INFO L85 PathProgramCache]: Analyzing trace with hash 373284588, now seen corresponding path program 2 times [2023-04-02 21:55:57,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:57,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27453400] [2023-04-02 21:55:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:57,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:57,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:57,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27453400] [2023-04-02 21:55:57,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27453400] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:57,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756739860] [2023-04-02 21:55:57,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:55:57,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:57,633 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) [2023-04-02 21:55:57,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:55:57,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:55:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:55:57,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 21:55:57,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:57,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 21:55:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756739860] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968044411] [2023-04-02 21:55:57,821 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 21:55:57,821 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:57,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:57,822 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:57,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:57,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 21:55:57,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 21:55:57,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:58,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:58,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:58,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 21:55:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095520437] [2023-04-02 21:55:58,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:58,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 21:55:58,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 21:55:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-04-02 21:55:58,268 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-04-02 21:55:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:55:58,517 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-04-02 21:55:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:55:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 20 [2023-04-02 21:55:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:55:58,518 INFO L225 Difference]: With dead ends: 50 [2023-04-02 21:55:58,518 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 21:55:58,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2023-04-02 21:55:58,520 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:55:58,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:55:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 21:55:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 21:55:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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) [2023-04-02 21:55:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-04-02 21:55:58,525 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 20 [2023-04-02 21:55:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:55:58,525 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-04-02 21:55:58,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-04-02 21:55:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-04-02 21:55:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 21:55:58,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:55:58,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:55:58,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:55:58,726 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 [2023-04-02 21:55:58,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:55:58,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:55:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1949881138, now seen corresponding path program 3 times [2023-04-02 21:55:58,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:55:58,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150512472] [2023-04-02 21:55:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:55:58,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:55:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:55:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-02 21:55:59,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:55:59,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150512472] [2023-04-02 21:55:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150512472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:55:59,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594824166] [2023-04-02 21:55:59,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:55:59,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:55:59,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:55:59,053 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) [2023-04-02 21:55:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:55:59,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:55:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:55:59,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 21:55:59,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:55:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:55:59,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:55:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 21:55:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594824166] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:55:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523536992] [2023-04-02 21:55:59,460 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 21:55:59,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:55:59,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:55:59,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:55:59,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:55:59,490 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 21:55:59,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 21:55:59,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:55:59,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-02 21:55:59,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:55:59,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:55:59,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 21:55:59,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429158606] [2023-04-02 21:55:59,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:55:59,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 21:55:59,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:55:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 21:55:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2023-04-02 21:55:59,855 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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) [2023-04-02 21:56:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:56:03,897 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2023-04-02 21:56:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 21:56:03,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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 38 [2023-04-02 21:56:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:56:03,898 INFO L225 Difference]: With dead ends: 98 [2023-04-02 21:56:03,898 INFO L226 Difference]: Without dead ends: 75 [2023-04-02 21:56:03,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 21:56:03,900 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:56:03,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:56:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-02 21:56:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-04-02 21:56:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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) [2023-04-02 21:56:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2023-04-02 21:56:03,908 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 38 [2023-04-02 21:56:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:56:03,908 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2023-04-02 21:56:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 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) [2023-04-02 21:56:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2023-04-02 21:56:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 21:56:03,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:56:03,910 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:56:03,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 21:56:04,115 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 [2023-04-02 21:56:04,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:56:04,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:56:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1080961214, now seen corresponding path program 4 times [2023-04-02 21:56:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:56:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622570555] [2023-04-02 21:56:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:56:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:56:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:56:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 21:56:04,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:56:04,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622570555] [2023-04-02 21:56:04,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622570555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:56:04,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437537333] [2023-04-02 21:56:04,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:56:04,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:56:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:56:04,949 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) [2023-04-02 21:56:04,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:56:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:56:05,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 93 conjunts are in the unsatisfiable core [2023-04-02 21:56:05,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:56:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 21:56:05,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:56:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 21:56:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437537333] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:56:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503121565] [2023-04-02 21:56:06,152 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-02 21:56:06,152 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:56:06,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:56:06,152 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:56:06,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:56:06,201 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 21:56:06,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 21:56:06,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:56:06,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1585#(and (<= 1 |#StackHeapBarrier|) (= |main_#in~argv.offset| main_~argv.offset) (<= 102400 (mod main_~i~0 4294967296)) (<= main_~ND~0 127) (= |main_#in~argv.base| main_~argv.base) (= |~#array~0.offset| 0) (<= 0 main_~i~0) (= 4 |~#array~0.base|) (= |#NULL.offset| 0) (<= 0 (+ 128 main_~ND~0)) (= |main_#in~argc| main_~argc) (= |#NULL.base| 0))' at error location [2023-04-02 21:56:06,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:56:06,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:56:06,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 21:56:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157467416] [2023-04-02 21:56:06,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:56:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 21:56:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:56:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 21:56:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 21:56:06,915 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2023-04-02 21:57:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:57:46,501 INFO L93 Difference]: Finished difference Result 194 states and 243 transitions. [2023-04-02 21:57:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 21:57:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 74 [2023-04-02 21:57:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:57:46,502 INFO L225 Difference]: With dead ends: 194 [2023-04-02 21:57:46,502 INFO L226 Difference]: Without dead ends: 147 [2023-04-02 21:57:46,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=1766, Invalid=4236, Unknown=4, NotChecked=0, Total=6006 [2023-04-02 21:57:46,506 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 367 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:57:46,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 97 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 21:57:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-02 21:57:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-04-02 21:57:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 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) [2023-04-02 21:57:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2023-04-02 21:57:46,517 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 74 [2023-04-02 21:57:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:57:46,518 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2023-04-02 21:57:46,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2023-04-02 21:57:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2023-04-02 21:57:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-02 21:57:46,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:57:46,519 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:57:46,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:57:46,726 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 [2023-04-02 21:57:46,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:57:46,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:57:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash 886605782, now seen corresponding path program 5 times [2023-04-02 21:57:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:57:46,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444659048] [2023-04-02 21:57:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:57:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:57:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:57:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-04-02 21:57:49,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:57:49,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444659048] [2023-04-02 21:57:49,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444659048] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:57:49,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264499548] [2023-04-02 21:57:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:57:49,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:57:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:57:49,390 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) [2023-04-02 21:57:49,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process