/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 EqDomain -i ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:45:16,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:45:16,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:45:16,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:45:16,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:45:16,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:45:16,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:45:16,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:45:16,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:45:16,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:45:16,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:45:16,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:45:16,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:45:16,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:45:16,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:45:16,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:45:16,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:45:16,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:45:16,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:45:16,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:45:16,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:45:16,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:45:16,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:45:16,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:45:16,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:45:16,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:45:16,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:45:16,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:45:16,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:45:16,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:45:16,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:45:16,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:45:16,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:45:16,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:45:16,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:45:16,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:45:16,947 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 08:45:16,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:45:16,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:45:16,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:45:16,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:45:16,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:45:16,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:45:16,977 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:45:16,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:45:16,978 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:45:16,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:45:16,978 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:45:16,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:45:16,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:45:16,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:45:16,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:45:16,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:45:16,981 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:45:16,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:45:16,981 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:45:16,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:45:16,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:45:16,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:45:16,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:45:16,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:45:16,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:45:16,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:45:16,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:45:16,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:45:16,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:45:16,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:45:16,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:45:16,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:45:17,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:45:17,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:45:17,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:45:17,245 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:45:17,245 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:45:17,246 INFO L432 ainManager$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 08:45:18,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:45:18,536 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:45:18,536 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-04-01 08:45:18,541 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a35dfb6a/a89e811c22a541d4a2ac0a5841e8179a/FLAG7276d462b [2023-04-01 08:45:18,554 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a35dfb6a/a89e811c22a541d4a2ac0a5841e8179a [2023-04-01 08:45:18,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:45:18,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:45:18,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:45:18,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:45:18,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:45:18,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518ab1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18, skipping insertion in model container [2023-04-01 08:45:18,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:45:18,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:45:18,753 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 08:45:18,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:45:18,768 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:45:18,785 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 08:45:18,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:45:18,796 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:45:18,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18 WrapperNode [2023-04-01 08:45:18,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:45:18,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:45:18,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:45:18,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:45:18,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:45:18,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:45:18,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:45:18,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:45:18,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (1/1) ... [2023-04-01 08:45:18,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:45:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:18,858 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 08:45:18,862 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 08:45:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:45:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:45:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:45:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:45:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:45:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:45:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:45:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:45:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:45:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:45:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:45:18,948 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:45:18,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:45:19,058 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:45:19,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:45:19,077 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 08:45:19,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:45:19 BoogieIcfgContainer [2023-04-01 08:45:19,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:45:19,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:45:19,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:45:19,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:45:19,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:45:18" (1/3) ... [2023-04-01 08:45:19,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773e33dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:45:19, skipping insertion in model container [2023-04-01 08:45:19,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:45:18" (2/3) ... [2023-04-01 08:45:19,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773e33dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:45:19, skipping insertion in model container [2023-04-01 08:45:19,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:45:19" (3/3) ... [2023-04-01 08:45:19,087 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-04-01 08:45:19,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:45:19,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:45:19,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:45:19,149 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;@494118e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:45:19,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:45:19,154 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 08:45:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:45:19,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:19,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:19,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:19,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:19,170 INFO L85 PathProgramCache]: Analyzing trace with hash 174780321, now seen corresponding path program 1 times [2023-04-01 08:45:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:19,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515462380] [2023-04-01 08:45:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:19,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:19,460 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 08:45:19,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515462380] [2023-04-01 08:45:19,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515462380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:45:19,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:45:19,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:45:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896562856] [2023-04-01 08:45:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:45:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:45:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:45:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:45:19,494 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 08:45:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:19,518 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-04-01 08:45:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:45:19,521 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 08:45:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:19,527 INFO L225 Difference]: With dead ends: 29 [2023-04-01 08:45:19,527 INFO L226 Difference]: Without dead ends: 14 [2023-04-01 08:45:19,530 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 08:45:19,533 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 08:45:19,534 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 08:45:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-01 08:45:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-01 08:45:19,566 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 08:45:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-01 08:45:19,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-01 08:45:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:19,568 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-01 08:45:19,568 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 08:45:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-01 08:45:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 08:45:19,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:19,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:19,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:45:19,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:19,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1562780666, now seen corresponding path program 1 times [2023-04-01 08:45:19,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:19,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244385476] [2023-04-01 08:45:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:19,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:19,686 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 08:45:19,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244385476] [2023-04-01 08:45:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244385476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:19,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390832506] [2023-04-01 08:45:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:19,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:19,691 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 08:45:19,692 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 08:45:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:19,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:45:19,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:19,805 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 08:45:19,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:19,832 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 08:45:19,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390832506] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924461628] [2023-04-01 08:45:19,877 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:19,877 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:19,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:19,885 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:19,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:20,157 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:20,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:20,693 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1924461628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:45:21,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4, 4] total 17 [2023-04-01 08:45:21,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130592732] [2023-04-01 08:45:21,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:45:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 08:45:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 08:45:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:45:21,824 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 08:45:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:23,247 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-04-01 08:45:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:45:23,247 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 08:45:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:23,248 INFO L225 Difference]: With dead ends: 19 [2023-04-01 08:45:23,248 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 08:45:23,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-04-01 08:45:23,250 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:45:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 5 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:45:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 08:45:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 08:45:23,257 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 08:45:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 08:45:23,258 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-04-01 08:45:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:23,258 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 08:45:23,259 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 08:45:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 08:45:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 08:45:23,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:23,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:23,266 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 08:45:23,466 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 08:45:23,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:23,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1404245353, now seen corresponding path program 1 times [2023-04-01 08:45:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91402450] [2023-04-01 08:45:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:23,574 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 08:45:23,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91402450] [2023-04-01 08:45:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91402450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234200278] [2023-04-01 08:45:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:23,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:23,576 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 08:45:23,586 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 08:45:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:23,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:45:23,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:23,640 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 08:45:23,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:23,663 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 08:45:23,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234200278] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896954963] [2023-04-01 08:45:23,665 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:23,665 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:23,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:23,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:23,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:23,731 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:24,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:24,270 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:25,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '332#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:25,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:25,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:25,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:45:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43024126] [2023-04-01 08:45:25,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:25,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:45:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:45:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:45:25,113 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 08:45:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:25,148 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-04-01 08:45:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:45:25,149 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 08:45:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:25,150 INFO L225 Difference]: With dead ends: 28 [2023-04-01 08:45:25,150 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 08:45:25,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:45:25,153 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 08:45:25,160 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 08:45:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 08:45:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 08:45:25,170 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 08:45:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 08:45:25,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-04-01 08:45:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:25,173 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 08:45:25,173 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 08:45:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 08:45:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 08:45:25,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:25,174 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:25,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:45:25,379 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 08:45:25,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:25,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1124020348, now seen corresponding path program 2 times [2023-04-01 08:45:25,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:25,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110673416] [2023-04-01 08:45:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:25,494 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 08:45:25,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110673416] [2023-04-01 08:45:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110673416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103396673] [2023-04-01 08:45:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:45:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:25,501 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 08:45:25,504 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 08:45:25,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:45:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:25,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 08:45:25,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:25,617 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 08:45:25,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:45:25,646 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 08:45:25,697 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 08:45:25,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:25,759 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 08:45:25,771 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 08:45:25,784 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 08:45:25,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103396673] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483159738] [2023-04-01 08:45:25,787 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:25,788 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:25,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:25,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:25,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:25,878 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:26,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:26,494 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:27,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '534#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:27,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:27,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:27,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-04-01 08:45:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120138639] [2023-04-01 08:45:27,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 08:45:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 08:45:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:45:27,351 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 08:45:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:27,487 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-04-01 08:45:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:45:27,489 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 08:45:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:27,489 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:45:27,489 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:45:27,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-04-01 08:45:27,491 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:45:27,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 43 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:45:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:45:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:45:27,499 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 08:45:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 08:45:27,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2023-04-01 08:45:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:27,501 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 08:45:27,501 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 08:45:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 08:45:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 08:45:27,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:27,502 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:27,509 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 08:45:27,707 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 08:45:27,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:27,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 729479343, now seen corresponding path program 3 times [2023-04-01 08:45:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8173428] [2023-04-01 08:45:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:27,827 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 08:45:27,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:27,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8173428] [2023-04-01 08:45:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8173428] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:27,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539535384] [2023-04-01 08:45:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:45:27,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:27,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:27,829 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 08:45:27,832 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 08:45:27,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:45:27,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:27,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 08:45:27,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:27,908 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 08:45:27,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:27,967 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 08:45:27,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539535384] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:27,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881886518] [2023-04-01 08:45:27,968 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:27,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:27,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:27,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:27,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:28,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:28,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:28,422 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:29,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:29,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:29,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-01 08:45:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093939835] [2023-04-01 08:45:29,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 08:45:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 08:45:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:45:29,285 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 08:45:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:29,313 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-04-01 08:45:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:45:29,314 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 08:45:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:29,314 INFO L225 Difference]: With dead ends: 44 [2023-04-01 08:45:29,314 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 08:45:29,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:45:29,316 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 08:45:29,316 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 08:45:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 08:45:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 08:45:29,327 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 08:45:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 08:45:29,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2023-04-01 08:45:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:29,328 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 08:45:29,328 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 08:45:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 08:45:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:45:29,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:29,329 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:29,337 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 08:45:29,534 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 08:45:29,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:29,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:29,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2056148726, now seen corresponding path program 4 times [2023-04-01 08:45:29,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:29,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053628868] [2023-04-01 08:45:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:29,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:29,830 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 08:45:29,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053628868] [2023-04-01 08:45:29,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053628868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:29,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719027919] [2023-04-01 08:45:29,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:45:29,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:29,833 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 08:45:29,856 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 08:45:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:29,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 08:45:29,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:29,940 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 08:45:29,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:30,154 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 08:45:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719027919] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478828823] [2023-04-01 08:45:30,156 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:30,156 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:30,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:30,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:30,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:30,211 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:30,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:30,590 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:31,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1132#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:31,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:31,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-04-01 08:45:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607918534] [2023-04-01 08:45:31,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 08:45:31,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 08:45:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 08:45:31,435 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 08:45:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:31,488 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-04-01 08:45:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 08:45:31,489 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 08:45:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:31,489 INFO L225 Difference]: With dead ends: 58 [2023-04-01 08:45:31,489 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 08:45:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 08:45:31,491 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 08:45:31,491 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 08:45:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 08:45:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 08:45:31,506 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 08:45:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-04-01 08:45:31,507 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 30 [2023-04-01 08:45:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:31,507 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-04-01 08:45:31,507 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 08:45:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-04-01 08:45:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 08:45:31,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:31,508 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:31,513 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 08:45:31,713 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 08:45:31,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:31,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1679909226, now seen corresponding path program 5 times [2023-04-01 08:45:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:31,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541778985] [2023-04-01 08:45:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:31,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:32,373 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 08:45:32,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:32,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541778985] [2023-04-01 08:45:32,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541778985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:32,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654324700] [2023-04-01 08:45:32,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:45:32,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:32,375 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 08:45:32,377 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 08:45:32,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:45:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:32,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 08:45:32,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:32,504 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 08:45:32,704 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-04-01 08:45:32,704 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 08:45:32,909 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 08:45:32,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:33,222 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 08:45:33,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:45:33,238 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 08:45:33,284 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 08:45:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654324700] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623150591] [2023-04-01 08:45:33,286 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:33,286 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:33,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:33,286 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:33,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:33,340 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:33,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:33,735 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:34,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1626#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:34,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:34,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:34,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11] total 46 [2023-04-01 08:45:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596020701] [2023-04-01 08:45:34,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:34,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 08:45:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 08:45:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 08:45:34,862 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 08:45:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:36,520 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-04-01 08:45:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 08:45:36,521 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 08:45:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:36,521 INFO L225 Difference]: With dead ends: 71 [2023-04-01 08:45:36,521 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 08:45:36,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=681, Invalid=3875, Unknown=0, NotChecked=0, Total=4556 [2023-04-01 08:45:36,523 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 08:45:36,524 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 08:45:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 08:45:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 08:45:36,543 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 08:45:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-04-01 08:45:36,544 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2023-04-01 08:45:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:36,544 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-04-01 08:45:36,544 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 08:45:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-04-01 08:45:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 08:45:36,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:36,546 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:36,553 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 08:45:36,751 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 08:45:36,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:36,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash -764380709, now seen corresponding path program 6 times [2023-04-01 08:45:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956322529] [2023-04-01 08:45:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:37,458 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 08:45:37,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956322529] [2023-04-01 08:45:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956322529] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853075385] [2023-04-01 08:45:37,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:45:37,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:37,460 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 08:45:37,461 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 08:45:37,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:45:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:37,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 08:45:37,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:37,633 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 08:45:37,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:38,483 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 08:45:38,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853075385] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511695883] [2023-04-01 08:45:38,485 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:38,485 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:38,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:38,485 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:38,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:38,527 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:38,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:38,800 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:39,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2243#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:39,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:39,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:39,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-04-01 08:45:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595935] [2023-04-01 08:45:39,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-04-01 08:45:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-04-01 08:45:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1746, Invalid=3084, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 08:45:39,730 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 08:45:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:39,840 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2023-04-01 08:45:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 08:45:39,840 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 08:45:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:39,845 INFO L225 Difference]: With dead ends: 104 [2023-04-01 08:45:39,845 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 08:45:39,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1746, Invalid=3084, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 08:45:39,847 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:45:39,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:45:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 08:45:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-04-01 08:45:39,884 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 08:45:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2023-04-01 08:45:39,888 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 53 [2023-04-01 08:45:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2023-04-01 08:45:39,888 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 08:45:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2023-04-01 08:45:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 08:45:39,898 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:39,898 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:39,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 08:45:40,103 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 08:45:40,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:40,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2041574442, now seen corresponding path program 7 times [2023-04-01 08:45:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:40,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057077848] [2023-04-01 08:45:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:42,186 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 08:45:42,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057077848] [2023-04-01 08:45:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057077848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795616155] [2023-04-01 08:45:42,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:45:42,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:42,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:42,193 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 08:45:42,196 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 08:45:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:42,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 08:45:42,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:42,446 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 08:45:42,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:45,622 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 08:45:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795616155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696921745] [2023-04-01 08:45:45,624 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:45,624 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:45,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:45,625 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:45,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:45,666 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:45,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:45,955 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:45:47,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3193#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:45:47,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:45:47,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:45:47,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2023-04-01 08:45:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67352325] [2023-04-01 08:45:47,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:45:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-04-01 08:45:47,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:45:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-04-01 08:45:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6821, Invalid=9435, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 08:45:47,073 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 08:45:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:45:47,260 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2023-04-01 08:45:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-04-01 08:45:47,261 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 08:45:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:45:47,263 INFO L225 Difference]: With dead ends: 162 [2023-04-01 08:45:47,263 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 08:45:47,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6821, Invalid=9435, Unknown=0, NotChecked=0, Total=16256 [2023-04-01 08:45:47,269 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 08:45:47,269 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 08:45:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 08:45:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-04-01 08:45:47,342 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 08:45:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-04-01 08:45:47,344 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 82 [2023-04-01 08:45:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:45:47,346 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-04-01 08:45:47,347 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 08:45:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-04-01 08:45:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 08:45:47,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:45:47,349 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:45:47,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 08:45:47,556 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 08:45:47,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:45:47,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:45:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1403679222, now seen corresponding path program 8 times [2023-04-01 08:45:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:45:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019643526] [2023-04-01 08:45:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:45:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:45:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:45:54,270 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 08:45:54,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:45:54,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019643526] [2023-04-01 08:45:54,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019643526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:45:54,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595305775] [2023-04-01 08:45:54,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:45:54,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:45:54,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:45:54,271 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 08:45:54,273 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 08:45:54,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 08:45:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:45:54,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 08:45:54,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:45:54,702 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 08:45:55,909 INFO L321 Elim1Store]: treesize reduction 24, result has 82.7 percent of original size [2023-04-01 08:45:55,910 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 08:45:56,307 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 08:45:56,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:45:58,103 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 08:45:58,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:45:58,145 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 08:45:58,247 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 08:45:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595305775] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:45:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915172172] [2023-04-01 08:45:58,249 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:45:58,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:45:58,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:45:58,249 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:45:58,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:45:58,288 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2023-04-01 08:45:58,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:45:58,594 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:46:00,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4756#(and (not (= |#StackHeapBarrier| |main_~#main__a~0.base|)) (= (select |old(#valid)| 3) 1) (= (select |old(#valid)| |main_~#main__a~0.base|) 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |main_~#main__a~0.base| 0)) (= (select |old(#valid)| 0) 0) (= main_~__VERIFIER_assert__cond~0 0) (not (= main_~main__pos~0 100000)) (< main_~main__pos~0 main_~main__i~0) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (not (= |#StackHeapBarrier| 0)) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select |old(#length)| 3) 12) (= (select |old(#length)| 2) 36) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= |main_~#main__a~0.offset| 0) (= (select |old(#valid)| 2) 1) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:46:00,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:46:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:46:00,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 19, 19] total 150 [2023-04-01 08:46:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225602221] [2023-04-01 08:46:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:46:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2023-04-01 08:46:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:46:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2023-04-01 08:46:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7080, Invalid=18680, Unknown=0, NotChecked=0, Total=25760 [2023-04-01 08:46:00,353 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 08:46:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:46:05,774 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2023-04-01 08:46:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-04-01 08:46:05,774 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 08:46:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:46:05,775 INFO L225 Difference]: With dead ends: 187 [2023-04-01 08:46:05,775 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 08:46:05,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=7682, Invalid=27100, Unknown=0, NotChecked=0, Total=34782 [2023-04-01 08:46:05,779 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 08:46:05,779 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 08:46:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 08:46:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-04-01 08:46:05,819 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 08:46:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2023-04-01 08:46:05,820 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 140 [2023-04-01 08:46:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:46:05,820 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2023-04-01 08:46:05,821 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 08:46:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2023-04-01 08:46:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 08:46:05,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:46:05,822 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:46:05,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:46:06,022 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 08:46:06,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:46:06,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:46:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1173968269, now seen corresponding path program 9 times [2023-04-01 08:46:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:46:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214084984] [2023-04-01 08:46:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:46:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:46:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat