/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/Problem15_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:13:19,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:13:19,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:13:19,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:13:19,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:13:19,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:13:19,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:13:19,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:13:19,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:13:19,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:13:19,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:13:19,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:13:19,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:13:19,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:13:19,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:13:19,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:13:19,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:13:19,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:13:19,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:13:19,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:13:19,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:13:19,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:13:19,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:13:19,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:13:19,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:13:19,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:13:19,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:13:19,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:13:19,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:13:19,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:13:19,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:13:19,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:13:19,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:13:19,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:13:19,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:13:19,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:13:19,737 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 04:13:19,751 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:13:19,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:13:19,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:13:19,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:13:19,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:13:19,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:13:19,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:13:19,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:13:19,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:13:19,754 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:13:19,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:13:19,754 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:13:19,754 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:13:19,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:13:19,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:13:19,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:13:19,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:19,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:13:19,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:13:19,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:13:19,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:13:19,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:13:19,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:13:19,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:13:19,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:13:19,922 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:13:19,922 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:13:19,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2023-04-01 04:13:20,835 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:13:21,235 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:13:21,236 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label13.c [2023-04-01 04:13:21,253 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60eb376e9/49f9806ac4d54e95ae55d3baf73e9c7d/FLAG44fc5aae8 [2023-04-01 04:13:21,269 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60eb376e9/49f9806ac4d54e95ae55d3baf73e9c7d [2023-04-01 04:13:21,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:13:21,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:13:21,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:21,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:13:21,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:13:21,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:21,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bd9c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21, skipping insertion in model container [2023-04-01 04:13:21,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:21,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:13:21,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:13:21,558 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/Problem15_label13.c[5940,5953] [2023-04-01 04:13:21,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:21,798 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:13:21,811 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/Problem15_label13.c[5940,5953] [2023-04-01 04:13:21,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:21,930 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:13:21,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21 WrapperNode [2023-04-01 04:13:21,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:21,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:13:21,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:13:21,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:13:21,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:21,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:21,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:21,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,031 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:13:22,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:13:22,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:13:22,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:13:22,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (1/1) ... [2023-04-01 04:13:22,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:22,098 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 04:13:22,103 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 04:13:22,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:13:22,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:13:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:13:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:13:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:13:22,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:13:22,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:13:22,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:13:22,247 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:13:22,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:13:24,397 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:13:24,855 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:13:24,855 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:13:24,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:13:24 BoogieIcfgContainer [2023-04-01 04:13:24,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:13:24,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:13:24,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:13:24,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:13:24,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:13:21" (1/3) ... [2023-04-01 04:13:24,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642a71a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:13:24, skipping insertion in model container [2023-04-01 04:13:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:21" (2/3) ... [2023-04-01 04:13:24,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642a71a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:13:24, skipping insertion in model container [2023-04-01 04:13:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:13:24" (3/3) ... [2023-04-01 04:13:24,863 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label13.c [2023-04-01 04:13:24,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:13:24,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:13:24,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:13:24,914 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@469a68eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:13:24,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:13:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:13:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:13:24,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:24,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:24,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:24,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash 271520451, now seen corresponding path program 1 times [2023-04-01 04:13:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:24,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012550656] [2023-04-01 04:13:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:25,161 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 04:13:25,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012550656] [2023-04-01 04:13:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012550656] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:25,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:13:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305982486] [2023-04-01 04:13:25,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:25,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:13:25,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:13:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:25,186 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 04:13:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:26,507 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-04-01 04:13:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:13:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-01 04:13:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:26,526 INFO L225 Difference]: With dead ends: 720 [2023-04-01 04:13:26,527 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 04:13:26,531 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 04:13:26,540 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:26,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:13:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 04:13:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-04-01 04:13:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-01 04:13:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-04-01 04:13:26,607 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-04-01 04:13:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:26,607 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-04-01 04:13:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 04:13:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-04-01 04:13:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:13:26,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:26,608 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:13:26,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:13:26,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:26,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1380945894, now seen corresponding path program 1 times [2023-04-01 04:13:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:26,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042070489] [2023-04-01 04:13:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:26,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042070489] [2023-04-01 04:13:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042070489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:26,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:26,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:13:26,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934173969] [2023-04-01 04:13:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:13:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:13:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:13:26,901 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:13:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:28,996 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-04-01 04:13:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:13:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 04:13:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:29,002 INFO L225 Difference]: With dead ends: 1426 [2023-04-01 04:13:29,002 INFO L226 Difference]: Without dead ends: 958 [2023-04-01 04:13:29,004 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 04:13:29,005 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 670 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:29,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 56 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:13:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-04-01 04:13:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-04-01 04:13:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.490174672489083) internal successors, (1365), 924 states have internal predecessors, (1365), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-01 04:13:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1405 transitions. [2023-04-01 04:13:29,094 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1405 transitions. Word has length 31 [2023-04-01 04:13:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:29,095 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1405 transitions. [2023-04-01 04:13:29,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 04:13:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1405 transitions. [2023-04-01 04:13:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:13:29,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:29,096 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 04:13:29,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:13:29,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:29,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash -252924142, now seen corresponding path program 1 times [2023-04-01 04:13:29,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613148974] [2023-04-01 04:13:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:29,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:29,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613148974] [2023-04-01 04:13:29,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613148974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:29,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:29,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:13:29,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007861918] [2023-04-01 04:13:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:29,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:13:29,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:13:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:13:29,444 INFO L87 Difference]: Start difference. First operand 940 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:13:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:31,358 INFO L93 Difference]: Finished difference Result 2858 states and 4365 transitions. [2023-04-01 04:13:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:13:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 04:13:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:31,369 INFO L225 Difference]: With dead ends: 2858 [2023-04-01 04:13:31,370 INFO L226 Difference]: Without dead ends: 1923 [2023-04-01 04:13:31,375 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 04:13:31,378 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:31,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:13:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-04-01 04:13:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-04-01 04:13:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3409653465346534) internal successors, (2167), 1640 states have internal predecessors, (2167), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-01 04:13:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2262 transitions. [2023-04-01 04:13:31,433 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2262 transitions. Word has length 35 [2023-04-01 04:13:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:31,433 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2262 transitions. [2023-04-01 04:13:31,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 04:13:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2262 transitions. [2023-04-01 04:13:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:13:31,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:31,441 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:13:31,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:31,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash -938939549, now seen corresponding path program 1 times [2023-04-01 04:13:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:31,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724437263] [2023-04-01 04:13:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:31,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724437263] [2023-04-01 04:13:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724437263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:31,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:31,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:13:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925881313] [2023-04-01 04:13:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:31,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:13:31,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:13:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:31,782 INFO L87 Difference]: Start difference. First operand 1666 states and 2262 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:13:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:32,926 INFO L93 Difference]: Finished difference Result 4256 states and 5993 transitions. [2023-04-01 04:13:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:13:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 152 [2023-04-01 04:13:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:32,937 INFO L225 Difference]: With dead ends: 4256 [2023-04-01 04:13:32,937 INFO L226 Difference]: Without dead ends: 2595 [2023-04-01 04:13:32,940 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 04:13:32,948 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:32,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:13:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-04-01 04:13:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-04-01 04:13:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.266829865361077) internal successors, (3105), 2479 states have internal predecessors, (3105), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-04-01 04:13:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3264 transitions. [2023-04-01 04:13:33,004 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3264 transitions. Word has length 152 [2023-04-01 04:13:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:33,007 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3264 transitions. [2023-04-01 04:13:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 04:13:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3264 transitions. [2023-04-01 04:13:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 04:13:33,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:33,014 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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, 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, 1, 1, 1, 1, 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 04:13:33,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:13:33,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:33,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1241807051, now seen corresponding path program 1 times [2023-04-01 04:13:33,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771738943] [2023-04-01 04:13:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:13:33,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771738943] [2023-04-01 04:13:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771738943] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:13:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466295155] [2023-04-01 04:13:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:13:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:33,469 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 04:13:33,473 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 04:13:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:33,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:13:33,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:13:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:13:33,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:13:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:13:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466295155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:13:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999583872] [2023-04-01 04:13:33,903 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:13:33,903 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:13:33,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:13:33,910 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:13:33,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:13:34,048 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:13:34,414 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2023-04-01 04:13:38,768 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 54145 conjuctions. This might take some time... [2023-04-01 04:13:44,284 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 937 conjuctions. [2023-04-01 04:13:48,409 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19