/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:13:35,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:13:35,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:13:35,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:13:35,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:13:35,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:13:35,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:13:35,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:13:35,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:13:36,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:13:36,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:13:36,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:13:36,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:13:36,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:13:36,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:13:36,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:13:36,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:13:36,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:13:36,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:13:36,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:13:36,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:13:36,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:13:36,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:13:36,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:13:36,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:13:36,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:13:36,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:13:36,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:13:36,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:13:36,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:13:36,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:13:36,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:13:36,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:13:36,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:13:36,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:13:36,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:13:36,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:13:36,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:13:36,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:13:36,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:13:36,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:13:36,038 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 [2023-03-31 21:13:36,067 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:13:36,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:13:36,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:13:36,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:13:36,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:13:36,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:13:36,068 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:13:36,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:13:36,069 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:13:36,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:13:36,069 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:13:36,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:13:36,070 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:13:36,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:13:36,071 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:13:36,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:13:36,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:13:36,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:13:36,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:13:36,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:13:36,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:13:36,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:36,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:13:36,073 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:13:36,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:13:36,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:13:36,074 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:13:36,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:13:36,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:13:36,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:13:36,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:13:36,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:13:36,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:13:36,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:13:36,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:13:36,326 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:13:36,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label13.c [2023-03-31 21:13:37,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:13:37,849 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:13:37,850 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label13.c [2023-03-31 21:13:37,869 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4139ffe3d/4f3216788fa740aa9c10b662770f76ad/FLAGcfff10f18 [2023-03-31 21:13:37,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4139ffe3d/4f3216788fa740aa9c10b662770f76ad [2023-03-31 21:13:37,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:13:37,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:13:37,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:37,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:13:37,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:13:37,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:37" (1/1) ... [2023-03-31 21:13:37,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6264c7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:37, skipping insertion in model container [2023-03-31 21:13:37,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:37" (1/1) ... [2023-03-31 21:13:37,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:13:37,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:13:38,195 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/eca-rers2012/Problem02_label13.c[15197,15210] [2023-03-31 21:13:38,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:38,256 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:13:38,361 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/eca-rers2012/Problem02_label13.c[15197,15210] [2023-03-31 21:13:38,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:38,425 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:13:38,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38 WrapperNode [2023-03-31 21:13:38,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:38,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:13:38,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:13:38,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:13:38,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:13:38,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:13:38,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:13:38,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:13:38,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (1/1) ... [2023-03-31 21:13:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:38,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:38,566 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) [2023-03-31 21:13:38,591 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 [2023-03-31 21:13:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:13:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:13:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:13:38,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:13:38,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:13:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:13:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:13:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:13:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:13:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:13:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:13:38,696 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:13:38,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:13:39,678 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:13:39,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:13:39,883 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:13:39,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:39 BoogieIcfgContainer [2023-03-31 21:13:39,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:13:39,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:13:39,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:13:39,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:13:39,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:13:37" (1/3) ... [2023-03-31 21:13:39,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627b3b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:39, skipping insertion in model container [2023-03-31 21:13:39,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:38" (2/3) ... [2023-03-31 21:13:39,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627b3b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:39, skipping insertion in model container [2023-03-31 21:13:39,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:39" (3/3) ... [2023-03-31 21:13:39,892 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2023-03-31 21:13:39,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:13:39,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:13:39,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:13:39,953 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;@11eae8d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:13:39,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:13:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:13:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:13:39,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:39,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:39,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:39,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2027415592, now seen corresponding path program 1 times [2023-03-31 21:13:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:39,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306274413] [2023-03-31 21:13:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:40,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:40,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306274413] [2023-03-31 21:13:40,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306274413] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:40,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:40,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:13:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664850607] [2023-03-31 21:13:40,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:40,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:13:40,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:13:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:13:40,535 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:13:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:40,975 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:13:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:13:40,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-03-31 21:13:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:40,991 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:13:40,991 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:13:40,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:13:40,999 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:41,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:13:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:13:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:13:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.7544910179640718) internal successors, (293), 167 states have internal predecessors, (293), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:13:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 302 transitions. [2023-03-31 21:13:41,064 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 302 transitions. Word has length 86 [2023-03-31 21:13:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:41,065 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 302 transitions. [2023-03-31 21:13:41,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:13:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 302 transitions. [2023-03-31 21:13:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 21:13:41,069 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:41,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:13:41,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:41,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1319283847, now seen corresponding path program 1 times [2023-03-31 21:13:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:41,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593983656] [2023-03-31 21:13:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:41,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:41,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:41,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593983656] [2023-03-31 21:13:41,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593983656] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:41,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:41,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:41,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497074624] [2023-03-31 21:13:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:41,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:41,422 INFO L87 Difference]: Start difference. First operand 175 states and 302 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:13:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:41,827 INFO L93 Difference]: Finished difference Result 537 states and 947 transitions. [2023-03-31 21:13:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2023-03-31 21:13:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:41,831 INFO L225 Difference]: With dead ends: 537 [2023-03-31 21:13:41,831 INFO L226 Difference]: Without dead ends: 367 [2023-03-31 21:13:41,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:13:41,833 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:41,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 97 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-03-31 21:13:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 351. [2023-03-31 21:13:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.6746268656716419) internal successors, (561), 339 states have internal predecessors, (561), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:13:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 588 transitions. [2023-03-31 21:13:41,854 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 588 transitions. Word has length 108 [2023-03-31 21:13:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:41,854 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 588 transitions. [2023-03-31 21:13:41,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:13:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 588 transitions. [2023-03-31 21:13:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 21:13:41,857 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:41,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:41,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:13:41,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:41,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:41,859 INFO L85 PathProgramCache]: Analyzing trace with hash 55109449, now seen corresponding path program 1 times [2023-03-31 21:13:41,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:41,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551055732] [2023-03-31 21:13:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:41,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:42,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551055732] [2023-03-31 21:13:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551055732] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:42,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604675064] [2023-03-31 21:13:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:42,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:42,035 INFO L87 Difference]: Start difference. First operand 351 states and 588 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:13:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:42,442 INFO L93 Difference]: Finished difference Result 1091 states and 1910 transitions. [2023-03-31 21:13:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:42,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2023-03-31 21:13:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:42,447 INFO L225 Difference]: With dead ends: 1091 [2023-03-31 21:13:42,447 INFO L226 Difference]: Without dead ends: 745 [2023-03-31 21:13:42,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:13:42,450 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:42,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 48 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:13:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-03-31 21:13:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 721. [2023-03-31 21:13:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 680 states have (on average 1.575) internal successors, (1071), 701 states have internal predecessors, (1071), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (87), 9 states have call predecessors, (87), 9 states have call successors, (87) [2023-03-31 21:13:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1168 transitions. [2023-03-31 21:13:42,482 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1168 transitions. Word has length 119 [2023-03-31 21:13:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:42,482 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1168 transitions. [2023-03-31 21:13:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:13:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1168 transitions. [2023-03-31 21:13:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 21:13:42,487 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:42,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:42,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:13:42,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:42,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -26380897, now seen corresponding path program 1 times [2023-03-31 21:13:42,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:42,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149212253] [2023-03-31 21:13:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:13:42,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:42,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149212253] [2023-03-31 21:13:42,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149212253] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:13:42,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239709725] [2023-03-31 21:13:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:42,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:13:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:42,991 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) [2023-03-31 21:13:42,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:13:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:43,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:13:43,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:13:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:43,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:13:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:43,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239709725] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:13:43,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574757830] [2023-03-31 21:13:43,451 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:13:43,451 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:13:43,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:13:43,458 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:13:43,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:13:43,749 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:13:44,681 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 76 for LOIs