/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:10:24,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:10:24,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:10:24,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:10:24,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:10:24,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:10:24,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:10:24,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:10:24,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:10:24,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:10:24,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:10:24,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:10:24,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:10:24,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:10:24,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:10:24,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:10:24,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:10:24,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:10:24,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:10:24,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:10:24,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:10:24,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:10:24,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:10:24,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:10:24,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:10:24,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:10:24,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:10:24,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:10:24,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:10:24,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:10:24,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:10:24,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:10:24,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:10:24,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:10:24,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:10:24,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:10:24,926 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 03:10:24,941 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:10:24,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:10:24,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:10:24,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:10:24,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:10:24,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:10:24,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:10:24,943 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:10:24,944 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:10:24,944 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:10:24,944 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:10:24,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:10:24,944 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:10:24,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:10:24,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:10:24,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:10:24,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:24,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:10:24,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:10:25,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:10:25,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:10:25,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:10:25,115 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:10:25,115 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:10:25,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2023-04-01 03:10:26,342 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:10:26,667 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:10:26,668 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2023-04-01 03:10:26,680 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8e0eb75/c30210bf098449d0afd7bc13810af46b/FLAG75e97dcf1 [2023-04-01 03:10:26,695 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8e0eb75/c30210bf098449d0afd7bc13810af46b [2023-04-01 03:10:26,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:10:26,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:10:26,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:26,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:10:26,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:10:26,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:26" (1/1) ... [2023-04-01 03:10:26,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e86f6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:26, skipping insertion in model container [2023-04-01 03:10:26,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:26" (1/1) ... [2023-04-01 03:10:26,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:10:26,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:10:26,986 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/Problem01_label05.c[17240,17253] [2023-04-01 03:10:27,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:27,047 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:10:27,103 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/Problem01_label05.c[17240,17253] [2023-04-01 03:10:27,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:27,141 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:10:27,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27 WrapperNode [2023-04-01 03:10:27,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:27,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:10:27,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:10:27,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:10:27,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,232 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:10:27,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:10:27,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:10:27,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:10:27,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:27,306 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 03:10:27,324 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 03:10:27,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:10:27,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:10:27,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:10:27,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:10:27,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:10:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:10:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:10:27,434 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:10:27,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:10:28,229 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:10:28,403 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:10:28,404 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:10:28,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:28 BoogieIcfgContainer [2023-04-01 03:10:28,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:10:28,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:10:28,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:10:28,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:10:28,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:10:26" (1/3) ... [2023-04-01 03:10:28,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327d274e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:28, skipping insertion in model container [2023-04-01 03:10:28,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27" (2/3) ... [2023-04-01 03:10:28,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327d274e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:28, skipping insertion in model container [2023-04-01 03:10:28,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:28" (3/3) ... [2023-04-01 03:10:28,414 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label05.c [2023-04-01 03:10:28,428 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:10:28,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:10:28,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:10:28,481 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;@34104a42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:10:28,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:10:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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) [2023-04-01 03:10:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:10:28,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:28,494 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] [2023-04-01 03:10:28,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:28,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1124012931, now seen corresponding path program 1 times [2023-04-01 03:10:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540542198] [2023-04-01 03:10:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:29,122 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 03:10:29,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540542198] [2023-04-01 03:10:29,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540542198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:29,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:29,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:10:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717379689] [2023-04-01 03:10:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:29,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:10:29,156 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-01 03:10:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:29,505 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:10:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:10:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:29,520 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:10:29,520 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:10:29,524 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 [2023-04-01 03:10:29,529 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:10:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:10:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 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) [2023-04-01 03:10:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 03:10:29,587 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 03:10:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:29,588 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 03:10:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-04-01 03:10:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 03:10:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 03:10:29,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:29,594 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-04-01 03:10:29,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:10:29,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:29,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:29,597 INFO L85 PathProgramCache]: Analyzing trace with hash 301928093, now seen corresponding path program 1 times [2023-04-01 03:10:29,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:29,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433087786] [2023-04-01 03:10:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:29,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:29,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433087786] [2023-04-01 03:10:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433087786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:29,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:29,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:10:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912446874] [2023-04-01 03:10:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:29,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:10:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:10:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:10:29,773 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-04-01 03:10:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:30,160 INFO L93 Difference]: Finished difference Result 479 states and 861 transitions. [2023-04-01 03:10:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:10:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 03:10:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:30,165 INFO L225 Difference]: With dead ends: 479 [2023-04-01 03:10:30,165 INFO L226 Difference]: Without dead ends: 327 [2023-04-01 03:10:30,172 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 [2023-04-01 03:10:30,173 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:30,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-01 03:10:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2023-04-01 03:10:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 303 states have internal predecessors, (517), 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) [2023-04-01 03:10:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 544 transitions. [2023-04-01 03:10:30,206 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 544 transitions. Word has length 87 [2023-04-01 03:10:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:30,210 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 544 transitions. [2023-04-01 03:10:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2023-04-01 03:10:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 544 transitions. [2023-04-01 03:10:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 03:10:30,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:30,216 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-01 03:10:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:10:30,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:30,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1131790993, now seen corresponding path program 1 times [2023-04-01 03:10:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869773550] [2023-04-01 03:10:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:30,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:30,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869773550] [2023-04-01 03:10:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869773550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:30,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:30,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:10:30,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18382778] [2023-04-01 03:10:30,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:10:30,385 INFO L87 Difference]: Start difference. First operand 315 states and 544 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:10:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:30,590 INFO L93 Difference]: Finished difference Result 852 states and 1501 transitions. [2023-04-01 03:10:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-04-01 03:10:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:30,596 INFO L225 Difference]: With dead ends: 852 [2023-04-01 03:10:30,597 INFO L226 Difference]: Without dead ends: 542 [2023-04-01 03:10:30,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:10:30,603 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:30,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:10:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-01 03:10:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2023-04-01 03:10:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 518 states have (on average 1.5463320463320462) internal successors, (801), 522 states have internal predecessors, (801), 9 states have call successors, (9), 9 states have call predecessors, (9), 12 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2023-04-01 03:10:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 858 transitions. [2023-04-01 03:10:30,635 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 858 transitions. Word has length 88 [2023-04-01 03:10:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:30,636 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 858 transitions. [2023-04-01 03:10:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:10:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 858 transitions. [2023-04-01 03:10:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 03:10:30,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:30,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 03:10:30,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:10:30,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:30,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 191873691, now seen corresponding path program 1 times [2023-04-01 03:10:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905179471] [2023-04-01 03:10:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:30,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905179471] [2023-04-01 03:10:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905179471] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386077108] [2023-04-01 03:10:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:30,939 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 03:10:30,940 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 03:10:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:31,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:10:31,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:31,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:10:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386077108] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:10:31,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913680497] [2023-04-01 03:10:31,376 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:10:31,379 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:10:31,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:10:31,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:10:31,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:10:31,693 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:10:53,421 WARN L223 SmtUtils]: Spent 19.00s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:11:21,109 WARN L223 SmtUtils]: Spent 17.81s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)