/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem01_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:09:51,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:09:51,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:09:51,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:09:52,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:09:52,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:09:52,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:09:52,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:09:52,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:09:52,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:09:52,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:09:52,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:09:52,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:09:52,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:09:52,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:09:52,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:09:52,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:09:52,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:09:52,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:09:52,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:09:52,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:09:52,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:09:52,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:09:52,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:09:52,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:09:52,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:09:52,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:09:52,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:09:52,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:09:52,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:09:52,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:09:52,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:09:52,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:09:52,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:09:52,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:09:52,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:09:52,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:09:52,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:09:52,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:09:52,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:09:52,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:09:52,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:09:52,056 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:09:52,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:09:52,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:09:52,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:09:52,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:09:52,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:09:52,057 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:09:52,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:09:52,058 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:09:52,059 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:09:52,059 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:09:52,059 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:09:52,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:09:52,059 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:09:52,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:09:52,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:09:52,060 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:09:52,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:09:52,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:09:52,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:09:52,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:09:52,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:09:52,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:09:52,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:09:52,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:09:52,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:09:52,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:09:52,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:09:52,217 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:09:52,217 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:09:52,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2023-03-31 21:09:53,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:09:53,598 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:09:53,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2023-03-31 21:09:53,629 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/998b285d4/b2109adc39304ca4a0c377e11177b8e9/FLAG483601633 [2023-03-31 21:09:53,642 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/998b285d4/b2109adc39304ca4a0c377e11177b8e9 [2023-03-31 21:09:53,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:09:53,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:09:53,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:09:53,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:09:53,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:09:53,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:09:53" (1/1) ... [2023-03-31 21:09:53,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b5057f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:53, skipping insertion in model container [2023-03-31 21:09:53,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:09:53" (1/1) ... [2023-03-31 21:09:53,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:09:53,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:09:53,976 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_label29.c[18109,18122] [2023-03-31 21:09:54,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:09:54,053 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:09:54,149 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_label29.c[18109,18122] [2023-03-31 21:09:54,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:09:54,201 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:09:54,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54 WrapperNode [2023-03-31 21:09:54,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:09:54,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:09:54,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:09:54,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:09:54,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:09:54,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:09:54,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:09:54,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:09:54,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (1/1) ... [2023-03-31 21:09:54,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:09:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:54,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:09:54,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:09:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:09:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:09:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:09:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:09:54,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:09:54,438 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:09:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:09:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:09:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:09:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:09:54,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:09:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:09:54,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:09:54,496 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:09:54,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:09:55,219 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:09:55,324 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:09:55,325 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:09:55,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:09:55 BoogieIcfgContainer [2023-03-31 21:09:55,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:09:55,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:09:55,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:09:55,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:09:55,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:09:53" (1/3) ... [2023-03-31 21:09:55,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b64aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:09:55, skipping insertion in model container [2023-03-31 21:09:55,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:09:54" (2/3) ... [2023-03-31 21:09:55,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b64aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:09:55, skipping insertion in model container [2023-03-31 21:09:55,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:09:55" (3/3) ... [2023-03-31 21:09:55,332 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2023-03-31 21:09:55,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:09:55,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:09:55,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:09:55,375 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;@29d5a505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:09:55,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:09:55,378 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) [2023-03-31 21:09:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:09:55,384 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:55,384 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] [2023-03-31 21:09:55,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:55,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2062137374, now seen corresponding path program 1 times [2023-03-31 21:09:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566539228] [2023-03-31 21:09:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:55,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566539228] [2023-03-31 21:09:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566539228] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:55,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:55,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:09:55,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178893347] [2023-03-31 21:09:55,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:09:56,002 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) [2023-03-31 21:09:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:56,284 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-03-31 21:09:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:56,286 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 [2023-03-31 21:09:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:56,298 INFO L225 Difference]: With dead ends: 246 [2023-03-31 21:09:56,299 INFO L226 Difference]: Without dead ends: 157 [2023-03-31 21:09:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:09:56,304 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:56,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-03-31 21:09:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-03-31 21:09:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8120805369127517) internal successors, (270), 149 states have internal predecessors, (270), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:09:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2023-03-31 21:09:56,340 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2023-03-31 21:09:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:56,341 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2023-03-31 21:09:56,341 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) [2023-03-31 21:09:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2023-03-31 21:09:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 21:09:56,343 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:56,344 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] [2023-03-31 21:09:56,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:09:56,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:56,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1470126140, now seen corresponding path program 1 times [2023-03-31 21:09:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:56,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298197372] [2023-03-31 21:09:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:56,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298197372] [2023-03-31 21:09:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298197372] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:56,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815721293] [2023-03-31 21:09:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:56,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:56,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:56,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:56,498 INFO L87 Difference]: Start difference. First operand 157 states and 279 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) [2023-03-31 21:09:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:56,858 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2023-03-31 21:09:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:09:56,858 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 [2023-03-31 21:09:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:56,861 INFO L225 Difference]: With dead ends: 402 [2023-03-31 21:09:56,861 INFO L226 Difference]: Without dead ends: 250 [2023-03-31 21:09:56,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:56,862 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:56,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 43 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:09:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-03-31 21:09:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2023-03-31 21:09:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 225 states have (on average 1.7244444444444444) internal successors, (388), 228 states have internal predecessors, (388), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 21:09:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2023-03-31 21:09:56,875 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2023-03-31 21:09:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:56,876 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2023-03-31 21:09:56,876 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) [2023-03-31 21:09:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2023-03-31 21:09:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-31 21:09:56,877 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:56,878 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] [2023-03-31 21:09:56,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:09:56,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:56,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1308828974, now seen corresponding path program 1 times [2023-03-31 21:09:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594616074] [2023-03-31 21:09:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:57,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594616074] [2023-03-31 21:09:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594616074] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298105431] [2023-03-31 21:09:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:57,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:57,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:09:57,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:09:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:57,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:57,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:57,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298105431] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:57,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:57,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-31 21:09:57,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017323313] [2023-03-31 21:09:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:09:57,556 INFO L87 Difference]: Start difference. First operand 238 states and 407 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) [2023-03-31 21:09:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:57,797 INFO L93 Difference]: Finished difference Result 700 states and 1242 transitions. [2023-03-31 21:09:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:57,798 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 [2023-03-31 21:09:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:57,800 INFO L225 Difference]: With dead ends: 700 [2023-03-31 21:09:57,800 INFO L226 Difference]: Without dead ends: 467 [2023-03-31 21:09:57,801 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 [2023-03-31 21:09:57,802 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:57,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-03-31 21:09:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2023-03-31 21:09:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 446 states have (on average 1.5269058295964126) internal successors, (681), 451 states have internal predecessors, (681), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (48), 7 states have call predecessors, (48), 7 states have call successors, (48) [2023-03-31 21:09:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 737 transitions. [2023-03-31 21:09:57,817 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 737 transitions. Word has length 88 [2023-03-31 21:09:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:57,817 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 737 transitions. [2023-03-31 21:09:57,818 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) [2023-03-31 21:09:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 737 transitions. [2023-03-31 21:09:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 21:09:57,820 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:57,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:09:57,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:09:58,026 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 [2023-03-31 21:09:58,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:58,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2050467450, now seen corresponding path program 1 times [2023-03-31 21:09:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991090978] [2023-03-31 21:09:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:58,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991090978] [2023-03-31 21:09:58,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991090978] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:58,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:58,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:58,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231795745] [2023-03-31 21:09:58,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:58,308 INFO L87 Difference]: Start difference. First operand 467 states and 737 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:58,671 INFO L93 Difference]: Finished difference Result 1358 states and 2246 transitions. [2023-03-31 21:09:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:09:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-03-31 21:09:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:58,674 INFO L225 Difference]: With dead ends: 1358 [2023-03-31 21:09:58,674 INFO L226 Difference]: Without dead ends: 730 [2023-03-31 21:09:58,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:58,680 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:58,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 49 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:09:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-03-31 21:09:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 643. [2023-03-31 21:09:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 623 states have internal predecessors, (805), 10 states have call successors, (10), 10 states have call predecessors, (10), 27 states have return successors, (88), 9 states have call predecessors, (88), 9 states have call successors, (88) [2023-03-31 21:09:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 903 transitions. [2023-03-31 21:09:58,712 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 903 transitions. Word has length 94 [2023-03-31 21:09:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:58,712 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 903 transitions. [2023-03-31 21:09:58,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 903 transitions. [2023-03-31 21:09:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 21:09:58,721 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:58,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:58,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:09:58,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:58,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash 144092006, now seen corresponding path program 1 times [2023-03-31 21:09:58,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:58,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347093050] [2023-03-31 21:09:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:58,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:59,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347093050] [2023-03-31 21:09:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347093050] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:59,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:09:59,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:09:59,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717872841] [2023-03-31 21:09:59,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:09:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:09:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:09:59,077 INFO L87 Difference]: Start difference. First operand 643 states and 903 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:59,369 INFO L93 Difference]: Finished difference Result 1384 states and 1984 transitions. [2023-03-31 21:09:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:09:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 110 [2023-03-31 21:09:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:59,373 INFO L225 Difference]: With dead ends: 1384 [2023-03-31 21:09:59,373 INFO L226 Difference]: Without dead ends: 746 [2023-03-31 21:09:59,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:09:59,374 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:59,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 46 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-03-31 21:09:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 736. [2023-03-31 21:09:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 687 states have (on average 1.2954876273653566) internal successors, (890), 714 states have internal predecessors, (890), 11 states have call successors, (11), 11 states have call predecessors, (11), 37 states have return successors, (126), 10 states have call predecessors, (126), 10 states have call successors, (126) [2023-03-31 21:09:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1027 transitions. [2023-03-31 21:09:59,396 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1027 transitions. Word has length 110 [2023-03-31 21:09:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:09:59,396 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1027 transitions. [2023-03-31 21:09:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:09:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1027 transitions. [2023-03-31 21:09:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 21:09:59,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:09:59,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:09:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:09:59,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:09:59,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:09:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 338346898, now seen corresponding path program 1 times [2023-03-31 21:09:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:09:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529152859] [2023-03-31 21:09:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:09:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:09:59,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:09:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529152859] [2023-03-31 21:09:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529152859] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:09:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410159761] [2023-03-31 21:09:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:09:59,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:09:59,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:09:59,612 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) [2023-03-31 21:09:59,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:09:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:09:59,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:09:59,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:09:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:09:59,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:09:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410159761] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:09:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:09:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:09:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470621539] [2023-03-31 21:09:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:09:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:09:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:09:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:09:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:59,789 INFO L87 Difference]: Start difference. First operand 736 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-03-31 21:09:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:09:59,973 INFO L93 Difference]: Finished difference Result 2028 states and 2890 transitions. [2023-03-31 21:09:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:09:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 135 [2023-03-31 21:09:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:09:59,978 INFO L225 Difference]: With dead ends: 2028 [2023-03-31 21:09:59,979 INFO L226 Difference]: Without dead ends: 1297 [2023-03-31 21:09:59,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:09:59,980 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:09:59,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:09:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2023-03-31 21:10:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2023-03-31 21:10:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1216 states have (on average 1.2491776315789473) internal successors, (1519), 1261 states have internal predecessors, (1519), 18 states have call successors, (18), 18 states have call predecessors, (18), 62 states have return successors, (221), 17 states have call predecessors, (221), 17 states have call successors, (221) [2023-03-31 21:10:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1758 transitions. [2023-03-31 21:10:00,011 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1758 transitions. Word has length 135 [2023-03-31 21:10:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:10:00,012 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 1758 transitions. [2023-03-31 21:10:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-03-31 21:10:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1758 transitions. [2023-03-31 21:10:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 21:10:00,016 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:10:00,017 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:10:00,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:10:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:10:00,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:10:00,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:10:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1346439298, now seen corresponding path program 1 times [2023-03-31 21:10:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:10:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846506296] [2023-03-31 21:10:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:10:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:10:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:10:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-03-31 21:10:00,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:10:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846506296] [2023-03-31 21:10:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846506296] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:10:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277426345] [2023-03-31 21:10:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:10:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:10:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:10:00,471 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) [2023-03-31 21:10:00,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:10:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:10:00,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:10:00,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:10:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-31 21:10:00,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:10:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277426345] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:10:00,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:10:00,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-31 21:10:00,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573735906] [2023-03-31 21:10:00,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:10:00,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:10:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:10:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:10:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:10:00,680 INFO L87 Difference]: Start difference. First operand 1297 states and 1758 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-03-31 21:10:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:10:00,846 INFO L93 Difference]: Finished difference Result 2668 states and 3629 transitions. [2023-03-31 21:10:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:10:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 158 [2023-03-31 21:10:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:10:00,851 INFO L225 Difference]: With dead ends: 2668 [2023-03-31 21:10:00,851 INFO L226 Difference]: Without dead ends: 1376 [2023-03-31 21:10:00,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:10:00,853 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:10:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:10:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-03-31 21:10:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1376. [2023-03-31 21:10:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1291 states have (on average 1.1975213013168087) internal successors, (1546), 1338 states have internal predecessors, (1546), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 18 states have call predecessors, (195), 18 states have call successors, (195) [2023-03-31 21:10:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1760 transitions. [2023-03-31 21:10:00,877 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1760 transitions. Word has length 158 [2023-03-31 21:10:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:10:00,877 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1760 transitions. [2023-03-31 21:10:00,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-03-31 21:10:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1760 transitions. [2023-03-31 21:10:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 21:10:00,881 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:10:00,881 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:10:00,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:10:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:10:01,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:10:01,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:10:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1435750806, now seen corresponding path program 1 times [2023-03-31 21:10:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:10:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692737418] [2023-03-31 21:10:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:10:01,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:10:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:10:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-03-31 21:10:01,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:10:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692737418] [2023-03-31 21:10:01,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692737418] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:10:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010753930] [2023-03-31 21:10:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:10:01,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:10:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:10:01,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:10:01,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:10:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:10:01,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:10:01,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:10:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 21:10:01,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:10:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 21:10:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010753930] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:10:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077747337] [2023-03-31 21:10:01,574 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-03-31 21:10:01,575 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:10:01,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:10:01,580 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:10:01,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:10:01,746 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-03-31 21:10:02,519 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs