/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:13:28,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:13:28,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:13:28,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:13:28,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:13:28,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:13:28,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:13:28,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:13:28,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:13:28,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:13:28,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:13:28,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:13:28,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:13:28,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:13:28,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:13:28,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:13:28,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:13:28,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:13:28,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:13:28,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:13:28,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:13:28,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:13:28,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:13:28,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:13:28,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:13:28,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:13:28,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:13:28,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:13:28,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:13:28,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:13:28,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:13:28,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:13:28,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:13:28,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:13:28,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:13:28,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:13:28,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:13:28,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:13:28,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:13:28,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:13:28,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:13:28,899 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 09:13:28,918 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:13:28,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:13:28,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:13:28,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:13:28,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:13:28,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:13:28,919 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:13:28,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:13:28,919 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:13:28,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:13:28,919 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:13:28,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:13:28,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:13:28,920 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:13:28,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:13:28,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:13:28,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:13:28,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:13:29,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:13:29,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:13:29,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:13:29,123 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:13:29,123 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:13:29,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label09.c [2023-04-01 09:13:30,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:13:30,325 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:13:30,329 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label09.c [2023-04-01 09:13:30,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4be2b0d/29db22f1b7364b2faa12f2185fc3d325/FLAGf1eded240 [2023-04-01 09:13:30,350 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b4be2b0d/29db22f1b7364b2faa12f2185fc3d325 [2023-04-01 09:13:30,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:13:30,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:13:30,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:13:30,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:13:30,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:13:30,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfc5053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30, skipping insertion in model container [2023-04-01 09:13:30,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:13:30,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:13:30,638 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_label09.c[20223,20236] [2023-04-01 09:13:30,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:13:30,667 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:13:30,723 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_label09.c[20223,20236] [2023-04-01 09:13:30,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:13:30,738 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:13:30,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30 WrapperNode [2023-04-01 09:13:30,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:13:30,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:13:30,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:13:30,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:13:30,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:13:30,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:13:30,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:13:30,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:13:30,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (1/1) ... [2023-04-01 09:13:30,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:13:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:13:30,838 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 09:13:30,844 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 09:13:30,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:13:30,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:13:30,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:13:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:13:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:13:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:13:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:13:30,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:13:30,936 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:13:30,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:13:31,657 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:13:31,856 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:13:31,856 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:13:31,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:13:31 BoogieIcfgContainer [2023-04-01 09:13:31,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:13:31,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:13:31,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:13:31,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:13:31,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:13:30" (1/3) ... [2023-04-01 09:13:31,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54afe74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:13:31, skipping insertion in model container [2023-04-01 09:13:31,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:13:30" (2/3) ... [2023-04-01 09:13:31,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54afe74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:13:31, skipping insertion in model container [2023-04-01 09:13:31,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:13:31" (3/3) ... [2023-04-01 09:13:31,866 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label09.c [2023-04-01 09:13:31,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:13:31,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:13:31,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:13:31,925 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;@79ce2e93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:13:31,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:13:31,929 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 09:13:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:13:31,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:31,937 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 09:13:31,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:31,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2062133022, now seen corresponding path program 1 times [2023-04-01 09:13:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108669058] [2023-04-01 09:13:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:32,422 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 09:13:32,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108669058] [2023-04-01 09:13:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108669058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:13:32,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:13:32,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:13:32,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946577790] [2023-04-01 09:13:32,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:13:32,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:13:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:13:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:13:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:13:32,456 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 09:13:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:13:32,712 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:13:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:13:32,714 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 09:13:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:13:32,725 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:13:32,726 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:13:32,729 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 09:13:32,731 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:13:32,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:13:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:13:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:13:32,761 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 09:13:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 09:13:32,763 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 09:13:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:13:32,764 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 09:13:32,764 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 09:13:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 09:13:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 09:13:32,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:32,767 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 09:13:32,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:13:32,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:32,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1470130492, now seen corresponding path program 1 times [2023-04-01 09:13:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:32,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542168551] [2023-04-01 09:13:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:32,951 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 09:13:32,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542168551] [2023-04-01 09:13:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542168551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:13:32,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:13:32,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:13:32,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788071541] [2023-04-01 09:13:32,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:13:32,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:13:32,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:13:32,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:13:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:13:32,954 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 09:13:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:13:33,286 INFO L93 Difference]: Finished difference Result 479 states and 861 transitions. [2023-04-01 09:13:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:13:33,289 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 09:13:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:13:33,293 INFO L225 Difference]: With dead ends: 479 [2023-04-01 09:13:33,293 INFO L226 Difference]: Without dead ends: 327 [2023-04-01 09:13:33,299 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 09:13:33,301 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 09:13:33,301 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 09:13:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-01 09:13:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2023-04-01 09:13:33,330 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 09:13:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 544 transitions. [2023-04-01 09:13:33,332 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 544 transitions. Word has length 87 [2023-04-01 09:13:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:13:33,332 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 544 transitions. [2023-04-01 09:13:33,332 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 09:13:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 544 transitions. [2023-04-01 09:13:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 09:13:33,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:33,335 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 09:13:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:13:33,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:33,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1308824622, now seen corresponding path program 1 times [2023-04-01 09:13:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:33,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111794230] [2023-04-01 09:13:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:13:33,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111794230] [2023-04-01 09:13:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111794230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:13:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910059336] [2023-04-01 09:13:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:33,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:13:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:13:33,953 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 09:13:33,959 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 09:13:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:34,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:13:34,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:13:34,153 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 09:13:34,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:13:34,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910059336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:13:34,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:13:34,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 09:13:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930990397] [2023-04-01 09:13:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:13:34,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:13:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:13:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:13:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:13:34,155 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 09:13:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:13:34,378 INFO L93 Difference]: Finished difference Result 775 states and 1360 transitions. [2023-04-01 09:13:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:13:34,379 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 09:13:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:13:34,381 INFO L225 Difference]: With dead ends: 775 [2023-04-01 09:13:34,381 INFO L226 Difference]: Without dead ends: 465 [2023-04-01 09:13:34,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:13:34,383 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:13:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:13:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-04-01 09:13:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-04-01 09:13:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 445 states have (on average 1.6247191011235955) internal successors, (723), 449 states have internal predecessors, (723), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (40), 7 states have call predecessors, (40), 7 states have call successors, (40) [2023-04-01 09:13:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 771 transitions. [2023-04-01 09:13:34,402 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 771 transitions. Word has length 88 [2023-04-01 09:13:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:13:34,402 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 771 transitions. [2023-04-01 09:13:34,402 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 09:13:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 771 transitions. [2023-04-01 09:13:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 09:13:34,406 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:34,406 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:13:34,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:13:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:13:34,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:34,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1481867338, now seen corresponding path program 1 times [2023-04-01 09:13:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:34,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745194503] [2023-04-01 09:13:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:13:34,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745194503] [2023-04-01 09:13:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745194503] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:13:34,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:13:34,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:13:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436948370] [2023-04-01 09:13:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:13:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:13:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:13:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:13:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:13:34,831 INFO L87 Difference]: Start difference. First operand 465 states and 771 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 09:13:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:13:35,151 INFO L93 Difference]: Finished difference Result 1346 states and 2324 transitions. [2023-04-01 09:13:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:13:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 92 [2023-04-01 09:13:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:13:35,157 INFO L225 Difference]: With dead ends: 1346 [2023-04-01 09:13:35,157 INFO L226 Difference]: Without dead ends: 886 [2023-04-01 09:13:35,160 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 09:13:35,165 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:13:35,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 44 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:13:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-04-01 09:13:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 797. [2023-04-01 09:13:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 753 states have (on average 1.4409030544488712) internal successors, (1085), 773 states have internal predecessors, (1085), 12 states have call successors, (12), 12 states have call predecessors, (12), 31 states have return successors, (137), 11 states have call predecessors, (137), 11 states have call successors, (137) [2023-04-01 09:13:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1234 transitions. [2023-04-01 09:13:35,197 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1234 transitions. Word has length 92 [2023-04-01 09:13:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:13:35,198 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1234 transitions. [2023-04-01 09:13:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 09:13:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1234 transitions. [2023-04-01 09:13:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 09:13:35,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:35,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:13:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:13:35,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:35,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1292208234, now seen corresponding path program 1 times [2023-04-01 09:13:35,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429862898] [2023-04-01 09:13:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:13:35,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429862898] [2023-04-01 09:13:35,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429862898] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:13:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555567910] [2023-04-01 09:13:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:35,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:13:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:13:35,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:13:35,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:13:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:35,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:13:35,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:13:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:13:35,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:13:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555567910] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:13:35,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:13:35,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 09:13:35,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211308745] [2023-04-01 09:13:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:13:35,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:13:35,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:13:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:13:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:13:35,675 INFO L87 Difference]: Start difference. First operand 797 states and 1234 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:13:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:13:35,882 INFO L93 Difference]: Finished difference Result 1745 states and 2769 transitions. [2023-04-01 09:13:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:13:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 111 [2023-04-01 09:13:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:13:35,887 INFO L225 Difference]: With dead ends: 1745 [2023-04-01 09:13:35,887 INFO L226 Difference]: Without dead ends: 953 [2023-04-01 09:13:35,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:13:35,889 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:13:35,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:13:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-04-01 09:13:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 878. [2023-04-01 09:13:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 829 states have (on average 1.3775633293124245) internal successors, (1142), 852 states have internal predecessors, (1142), 13 states have call successors, (13), 13 states have call predecessors, (13), 35 states have return successors, (140), 12 states have call predecessors, (140), 12 states have call successors, (140) [2023-04-01 09:13:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1295 transitions. [2023-04-01 09:13:35,908 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1295 transitions. Word has length 111 [2023-04-01 09:13:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:13:35,909 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1295 transitions. [2023-04-01 09:13:35,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:13:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1295 transitions. [2023-04-01 09:13:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-04-01 09:13:35,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:13:35,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 09:13:35,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:13:36,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:13:36,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:13:36,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:13:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -930647106, now seen corresponding path program 1 times [2023-04-01 09:13:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:13:36,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25621206] [2023-04-01 09:13:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:13:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 86 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 09:13:36,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:13:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25621206] [2023-04-01 09:13:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25621206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:13:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693541270] [2023-04-01 09:13:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:13:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:13:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:13:36,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:13:36,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:13:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:13:36,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:13:36,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:13:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 09:13:36,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:13:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 09:13:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693541270] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:13:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891959872] [2023-04-01 09:13:36,781 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:13:36,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:13:36,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:13:36,787 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:13:36,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:13:37,052 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:14:00,676 WARN L223 SmtUtils]: Spent 19.24s on a formula simplification. DAG size of input: 1232 DAG size of output: 1230 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)