/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/Problem03_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:31:23,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:31:23,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:31:23,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:31:23,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:31:23,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:31:23,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:31:23,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:31:23,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:31:23,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:31:23,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:31:23,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:31:23,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:31:23,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:31:23,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:31:23,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:31:23,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:31:23,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:31:23,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:31:23,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:31:23,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:31:23,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:31:23,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:31:23,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:31:23,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:31:23,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:31:23,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:31:23,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:31:23,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:31:23,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:31:23,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:31:23,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:31:23,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:31:23,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:31:23,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:31:23,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:31:23,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:31:23,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:31:23,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:31:23,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:31:23,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:31:23,919 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 [2023-04-02 16:31:23,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:31:23,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:31:23,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:31:23,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:31:23,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:31:23,950 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:31:23,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:31:23,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:31:23,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:31:23,951 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:31:23,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:31:23,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:31:23,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:31:23,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:31:23,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:31:23,954 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:31:23,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:31:23,955 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:31:23,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:31:23,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:31:23,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:31:23,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:31:23,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:31:23,956 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:31:23,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:31:23,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:31:23,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:31:23,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:31:23,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:31:23,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:31:23,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:31:24,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:31:24,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:31:24,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:31:24,178 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:31:24,179 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:31:24,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2023-04-02 16:31:25,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:31:25,661 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:31:25,662 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2023-04-02 16:31:25,677 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa53778f2/ac1f51421cfe4e688baf5f4d5901be52/FLAGa9463cd25 [2023-04-02 16:31:25,692 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa53778f2/ac1f51421cfe4e688baf5f4d5901be52 [2023-04-02 16:31:25,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:31:25,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:31:25,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:31:25,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:31:25,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:31:25,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:31:25" (1/1) ... [2023-04-02 16:31:25,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bbc06a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:25, skipping insertion in model container [2023-04-02 16:31:25,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:31:25" (1/1) ... [2023-04-02 16:31:25,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:31:25,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:31:26,255 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/Problem03_label07.c[57439,57452] [2023-04-02 16:31:26,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:31:26,300 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:31:26,564 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/Problem03_label07.c[57439,57452] [2023-04-02 16:31:26,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:31:26,592 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:31:26,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26 WrapperNode [2023-04-02 16:31:26,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:31:26,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:31:26,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:31:26,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:31:26,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:31:26,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:31:26,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:31:26,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:31:26,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (1/1) ... [2023-04-02 16:31:26,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:31:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:31:26,791 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) [2023-04-02 16:31:26,813 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 [2023-04-02 16:31:26,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:31:26,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:31:26,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:31:26,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:31:26,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:31:26,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:31:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:31:26,957 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:31:26,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:31:28,461 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:31:28,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:31:28,786 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:31:28,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:31:28 BoogieIcfgContainer [2023-04-02 16:31:28,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:31:28,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:31:28,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:31:28,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:31:28,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:31:25" (1/3) ... [2023-04-02 16:31:28,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19112c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:31:28, skipping insertion in model container [2023-04-02 16:31:28,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:31:26" (2/3) ... [2023-04-02 16:31:28,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19112c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:31:28, skipping insertion in model container [2023-04-02 16:31:28,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:31:28" (3/3) ... [2023-04-02 16:31:28,795 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2023-04-02 16:31:28,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:31:28,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:31:28,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:31:28,853 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;@22377f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:31:28,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:31:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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) [2023-04-02 16:31:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:31:28,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:28,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:28,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:28,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:28,877 INFO L85 PathProgramCache]: Analyzing trace with hash 597536758, now seen corresponding path program 1 times [2023-04-02 16:31:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:28,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802409235] [2023-04-02 16:31:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:29,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:29,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802409235] [2023-04-02 16:31:29,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802409235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:29,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:29,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:31:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316450613] [2023-04-02 16:31:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:29,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:31:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:30,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:31:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:31:30,007 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-02 16:31:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:30,713 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:31:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:31:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-02 16:31:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:30,733 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:31:30,733 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:31:30,736 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 [2023-04-02 16:31:30,738 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:30,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:31:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:31:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:31:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 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) [2023-04-02 16:31:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-02 16:31:30,792 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-02 16:31:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:30,792 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-02 16:31:30,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-02 16:31:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-02 16:31:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 16:31:30,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:30,797 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, 1, 1, 1, 1, 1] [2023-04-02 16:31:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:31:30,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:30,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 316767311, now seen corresponding path program 1 times [2023-04-02 16:31:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35726969] [2023-04-02 16:31:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:31,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35726969] [2023-04-02 16:31:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35726969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:31,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:31:31,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609936391] [2023-04-02 16:31:31,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:31,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:31:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:31:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:31:31,392 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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) [2023-04-02 16:31:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:32,134 INFO L93 Difference]: Finished difference Result 919 states and 1752 transitions. [2023-04-02 16:31:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:31:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-04-02 16:31:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:32,141 INFO L225 Difference]: With dead ends: 919 [2023-04-02 16:31:32,141 INFO L226 Difference]: Without dead ends: 623 [2023-04-02 16:31:32,142 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 [2023-04-02 16:31:32,144 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 531 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:32,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 46 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:31:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-04-02 16:31:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 603. [2023-04-02 16:31:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.7393526405451447) internal successors, (1021), 591 states have internal predecessors, (1021), 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) [2023-04-02 16:31:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1048 transitions. [2023-04-02 16:31:32,205 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1048 transitions. Word has length 157 [2023-04-02 16:31:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:32,211 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1048 transitions. [2023-04-02 16:31:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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) [2023-04-02 16:31:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1048 transitions. [2023-04-02 16:31:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-02 16:31:32,218 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:32,218 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:31:32,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:32,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash -848545835, now seen corresponding path program 1 times [2023-04-02 16:31:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461391754] [2023-04-02 16:31:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:32,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461391754] [2023-04-02 16:31:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461391754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:31:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093035192] [2023-04-02 16:31:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:31:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:31:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:31:32,605 INFO L87 Difference]: Start difference. First operand 603 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-04-02 16:31:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:33,491 INFO L93 Difference]: Finished difference Result 1857 states and 3314 transitions. [2023-04-02 16:31:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:31:33,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-02 16:31:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:33,499 INFO L225 Difference]: With dead ends: 1857 [2023-04-02 16:31:33,499 INFO L226 Difference]: Without dead ends: 1259 [2023-04-02 16:31:33,501 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 [2023-04-02 16:31:33,502 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 494 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:33,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 48 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:31:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-04-02 16:31:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1233. [2023-04-02 16:31:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1188 states have (on average 1.6902356902356903) internal successors, (2008), 1213 states have internal predecessors, (2008), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (106), 9 states have call predecessors, (106), 9 states have call successors, (106) [2023-04-02 16:31:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2124 transitions. [2023-04-02 16:31:33,551 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2124 transitions. Word has length 161 [2023-04-02 16:31:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:33,551 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2124 transitions. [2023-04-02 16:31:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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) [2023-04-02 16:31:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2124 transitions. [2023-04-02 16:31:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 16:31:33,555 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:33,556 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:33,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 16:31:33,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:33,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1089868721, now seen corresponding path program 1 times [2023-04-02 16:31:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681285863] [2023-04-02 16:31:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:34,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:34,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681285863] [2023-04-02 16:31:34,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681285863] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:34,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:34,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:31:34,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704358311] [2023-04-02 16:31:34,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:34,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:31:34,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:31:34,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:31:34,496 INFO L87 Difference]: Start difference. First operand 1233 states and 2124 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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) [2023-04-02 16:31:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:35,384 INFO L93 Difference]: Finished difference Result 3123 states and 5512 transitions. [2023-04-02 16:31:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:31:35,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 163 [2023-04-02 16:31:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:35,394 INFO L225 Difference]: With dead ends: 3123 [2023-04-02 16:31:35,394 INFO L226 Difference]: Without dead ends: 1895 [2023-04-02 16:31:35,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:31:35,398 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 455 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:35,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 55 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:31:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2023-04-02 16:31:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1863. [2023-04-02 16:31:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1789 states have (on average 1.6528787031861376) internal successors, (2957), 1835 states have internal predecessors, (2957), 14 states have call successors, (14), 14 states have call predecessors, (14), 59 states have return successors, (226), 13 states have call predecessors, (226), 13 states have call successors, (226) [2023-04-02 16:31:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3197 transitions. [2023-04-02 16:31:35,459 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3197 transitions. Word has length 163 [2023-04-02 16:31:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:35,460 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3197 transitions. [2023-04-02 16:31:35,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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) [2023-04-02 16:31:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3197 transitions. [2023-04-02 16:31:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 16:31:35,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:35,465 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 16:31:35,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:35,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash 153691224, now seen corresponding path program 1 times [2023-04-02 16:31:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:35,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517882550] [2023-04-02 16:31:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:35,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:35,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517882550] [2023-04-02 16:31:35,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517882550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:35,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:35,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:31:35,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117865716] [2023-04-02 16:31:35,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:31:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:31:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:31:35,816 INFO L87 Difference]: Start difference. First operand 1863 states and 3197 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-04-02 16:31:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:36,424 INFO L93 Difference]: Finished difference Result 4331 states and 7685 transitions. [2023-04-02 16:31:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:31:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-04-02 16:31:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:36,440 INFO L225 Difference]: With dead ends: 4331 [2023-04-02 16:31:36,440 INFO L226 Difference]: Without dead ends: 2473 [2023-04-02 16:31:36,446 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 [2023-04-02 16:31:36,453 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:36,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 254 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:31:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2023-04-02 16:31:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2473. [2023-04-02 16:31:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2380 states have (on average 1.6050420168067228) internal successors, (3820), 2437 states have internal predecessors, (3820), 18 states have call successors, (18), 18 states have call predecessors, (18), 74 states have return successors, (364), 17 states have call predecessors, (364), 17 states have call successors, (364) [2023-04-02 16:31:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4202 transitions. [2023-04-02 16:31:36,522 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4202 transitions. Word has length 170 [2023-04-02 16:31:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:36,522 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 4202 transitions. [2023-04-02 16:31:36,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-04-02 16:31:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4202 transitions. [2023-04-02 16:31:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 16:31:36,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:36,529 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 16:31:36,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:36,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -747240673, now seen corresponding path program 1 times [2023-04-02 16:31:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989099842] [2023-04-02 16:31:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:36,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:36,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989099842] [2023-04-02 16:31:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989099842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:36,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:31:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:31:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730630162] [2023-04-02 16:31:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:36,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:31:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:31:36,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:31:36,891 INFO L87 Difference]: Start difference. First operand 2473 states and 4202 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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) [2023-04-02 16:31:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:37,761 INFO L93 Difference]: Finished difference Result 7581 states and 14032 transitions. [2023-04-02 16:31:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:31:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 171 [2023-04-02 16:31:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:37,795 INFO L225 Difference]: With dead ends: 7581 [2023-04-02 16:31:37,796 INFO L226 Difference]: Without dead ends: 5113 [2023-04-02 16:31:37,805 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 [2023-04-02 16:31:37,808 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 526 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:37,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 43 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:31:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5113 states. [2023-04-02 16:31:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5113 to 5001. [2023-04-02 16:31:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4788 states have (on average 1.5123224728487887) internal successors, (7241), 4933 states have internal predecessors, (7241), 34 states have call successors, (34), 34 states have call predecessors, (34), 178 states have return successors, (1073), 33 states have call predecessors, (1073), 33 states have call successors, (1073) [2023-04-02 16:31:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8348 transitions. [2023-04-02 16:31:38,067 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8348 transitions. Word has length 171 [2023-04-02 16:31:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:38,068 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8348 transitions. [2023-04-02 16:31:38,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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) [2023-04-02 16:31:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8348 transitions. [2023-04-02 16:31:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-02 16:31:38,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:38,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:38,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 16:31:38,082 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:38,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:38,082 INFO L85 PathProgramCache]: Analyzing trace with hash -106941621, now seen corresponding path program 1 times [2023-04-02 16:31:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978333665] [2023-04-02 16:31:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:38,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978333665] [2023-04-02 16:31:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978333665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:31:38,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360213694] [2023-04-02 16:31:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:38,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:31:38,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:31:38,376 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) [2023-04-02 16:31:38,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:31:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:38,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 16:31:38,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:31:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 16:31:38,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:31:38,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360213694] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:31:38,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:31:38,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 16:31:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407077754] [2023-04-02 16:31:38,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:31:38,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:31:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:31:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:31:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:31:38,833 INFO L87 Difference]: Start difference. First operand 5001 states and 8348 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 16:31:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:31:39,314 INFO L93 Difference]: Finished difference Result 14553 states and 25698 transitions. [2023-04-02 16:31:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 16:31:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 188 [2023-04-02 16:31:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:31:39,378 INFO L225 Difference]: With dead ends: 14553 [2023-04-02 16:31:39,378 INFO L226 Difference]: Without dead ends: 9557 [2023-04-02 16:31:39,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:31:39,393 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 771 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 16:31:39,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 589 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 16:31:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2023-04-02 16:31:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 9419. [2023-04-02 16:31:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9419 states, 8999 states have (on average 1.5163907100788976) internal successors, (13646), 9295 states have internal predecessors, (13646), 62 states have call successors, (62), 62 states have call predecessors, (62), 357 states have return successors, (2201), 61 states have call predecessors, (2201), 61 states have call successors, (2201) [2023-04-02 16:31:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9419 states to 9419 states and 15909 transitions. [2023-04-02 16:31:39,802 INFO L78 Accepts]: Start accepts. Automaton has 9419 states and 15909 transitions. Word has length 188 [2023-04-02 16:31:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:31:39,802 INFO L495 AbstractCegarLoop]: Abstraction has 9419 states and 15909 transitions. [2023-04-02 16:31:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 16:31:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9419 states and 15909 transitions. [2023-04-02 16:31:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-04-02 16:31:39,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:31:39,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:31:39,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 16:31:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:31:40,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:31:40,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:31:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -687475174, now seen corresponding path program 1 times [2023-04-02 16:31:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:31:40,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215123074] [2023-04-02 16:31:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:31:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:40,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:31:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215123074] [2023-04-02 16:31:40,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215123074] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:31:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987090250] [2023-04-02 16:31:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:31:40,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:31:40,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:31:40,302 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) [2023-04-02 16:31:40,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 16:31:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:31:40,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:31:40,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:31:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:40,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:31:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:31:40,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987090250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:31:40,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070522290] [2023-04-02 16:31:40,809 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:31:40,809 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:31:40,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:31:40,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:31:40,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:31:41,574 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:31:50,596 WARN L223 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:32:36,048 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:33:02,754 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.