/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/Problem16_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:16:27,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:16:27,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:16:27,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:16:27,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:16:27,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:16:27,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:16:27,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:16:27,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:16:27,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:16:27,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:16:27,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:16:27,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:16:27,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:16:27,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:16:27,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:16:27,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:16:27,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:16:27,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:16:27,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:16:27,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:16:27,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:16:27,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:16:27,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:16:27,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:16:27,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:16:27,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:16:27,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:16:27,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:16:27,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:16:27,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:16:27,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:16:27,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:16:27,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:16:27,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:16:27,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:16:27,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:16:27,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:16:27,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:16:27,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:16:27,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:16:27,734 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 22:16:27,754 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:16:27,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:16:27,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:16:27,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:16:27,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:16:27,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:16:27,755 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:16:27,756 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:16:27,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:16:27,756 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:16:27,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:16:27,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:16:27,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:16:27,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:16:27,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:16:27,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:16:27,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:16:27,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:16:27,952 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:16:27,953 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:16:27,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2023-03-31 22:16:28,865 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:16:29,142 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:16:29,143 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2023-03-31 22:16:29,159 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76491f29c/f603e598c85e49fe84bbe93314a1dc10/FLAGfe671e2c2 [2023-03-31 22:16:29,171 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76491f29c/f603e598c85e49fe84bbe93314a1dc10 [2023-03-31 22:16:29,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:16:29,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:16:29,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:16:29,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:16:29,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:16:29,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14023333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29, skipping insertion in model container [2023-03-31 22:16:29,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:16:29,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:16:29,340 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/Problem16_label22.c[1636,1649] [2023-03-31 22:16:29,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:16:29,632 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:16:29,647 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/Problem16_label22.c[1636,1649] [2023-03-31 22:16:29,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:16:29,800 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:16:29,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29 WrapperNode [2023-03-31 22:16:29,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:16:29,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:16:29,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:16:29,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:16:29,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:16:29,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:16:29,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:16:29,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:16:29,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (1/1) ... [2023-03-31 22:16:29,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:16:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:29,965 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 22:16:29,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:16:29,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:16:29,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:16:29,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:16:29,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:16:29,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:16:29,982 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 22:16:29,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:16:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:16:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:16:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:16:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:16:29,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:16:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:16:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:16:29,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:16:30,053 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:16:30,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:16:31,474 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:16:32,191 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:16:32,192 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:16:32,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:16:32 BoogieIcfgContainer [2023-03-31 22:16:32,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:16:32,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:16:32,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:16:32,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:16:32,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:16:29" (1/3) ... [2023-03-31 22:16:32,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519d1186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:16:32, skipping insertion in model container [2023-03-31 22:16:32,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:29" (2/3) ... [2023-03-31 22:16:32,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519d1186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:16:32, skipping insertion in model container [2023-03-31 22:16:32,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:16:32" (3/3) ... [2023-03-31 22:16:32,200 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label22.c [2023-03-31 22:16:32,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:16:32,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:16:32,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:16:32,264 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;@6400f601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:16:32,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:16:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:16:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:16:32,273 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:32,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:32,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:32,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -706741658, now seen corresponding path program 1 times [2023-03-31 22:16:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774501080] [2023-03-31 22:16:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:32,497 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 22:16:32,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:32,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774501080] [2023-03-31 22:16:32,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774501080] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:32,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:32,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:16:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355491660] [2023-03-31 22:16:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:32,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:16:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:16:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:16:32,535 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:16:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:33,600 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:16:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:16:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:16:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:33,612 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:16:33,612 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:16:33,617 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 22:16:33,619 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:33,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 22:16:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:16:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-03-31 22:16:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:16:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-03-31 22:16:33,669 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-03-31 22:16:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:33,670 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-03-31 22:16:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:16:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-03-31 22:16:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:16:33,672 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:33,672 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] [2023-03-31 22:16:33,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:16:33,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:33,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1772509469, now seen corresponding path program 1 times [2023-03-31 22:16:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063871469] [2023-03-31 22:16:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:33,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063871469] [2023-03-31 22:16:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063871469] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:16:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531394331] [2023-03-31 22:16:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:33,953 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:16:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:35,102 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-03-31 22:16:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:16:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:35,109 INFO L225 Difference]: With dead ends: 1405 [2023-03-31 22:16:35,109 INFO L226 Difference]: Without dead ends: 943 [2023-03-31 22:16:35,110 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 22:16:35,111 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:35,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:16:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-03-31 22:16:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-03-31 22:16:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-03-31 22:16:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-03-31 22:16:35,138 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-03-31 22:16:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:35,139 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-03-31 22:16:35,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:16:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-03-31 22:16:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:16:35,142 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:35,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 22:16:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:16:35,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:35,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1887441872, now seen corresponding path program 1 times [2023-03-31 22:16:35,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:35,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509213648] [2023-03-31 22:16:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:35,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:16:35,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509213648] [2023-03-31 22:16:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509213648] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:35,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072823093] [2023-03-31 22:16:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:35,448 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 22:16:35,487 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 22:16:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:35,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:16:35,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:16:35,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:16:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072823093] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:35,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:16:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:16:35,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134024596] [2023-03-31 22:16:35,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:35,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:16:35,705 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:16:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:36,914 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-03-31 22:16:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 115 [2023-03-31 22:16:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:36,919 INFO L225 Difference]: With dead ends: 1907 [2023-03-31 22:16:36,919 INFO L226 Difference]: Without dead ends: 1198 [2023-03-31 22:16:36,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:16:36,922 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:36,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:16:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-03-31 22:16:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-03-31 22:16:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-03-31 22:16:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-03-31 22:16:36,948 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-03-31 22:16:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:36,948 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-03-31 22:16:36,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:16:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-03-31 22:16:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-31 22:16:36,952 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:36,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:16:36,960 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 22:16:37,159 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 22:16:37,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:37,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1434781951, now seen corresponding path program 1 times [2023-03-31 22:16:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:37,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596200716] [2023-03-31 22:16:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:37,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:16:37,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596200716] [2023-03-31 22:16:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596200716] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852555461] [2023-03-31 22:16:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:37,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:37,401 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 22:16:37,433 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 22:16:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:37,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:16:37,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:16:37,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:16:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-03-31 22:16:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852555461] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:16:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145104780] [2023-03-31 22:16:37,807 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:16:37,807 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:16:37,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:16:37,812 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:16:37,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:16:37,910 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:16:38,033 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-03-31 22:16:38,115 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2023-03-31 22:16:38,817 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:16:38,830 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-03-31 22:16:39,004 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2023-03-31 22:16:39,491 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13716 conjuctions. This might take some time... [2023-03-31 22:16:39,731 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 116 conjuctions. [2023-03-31 22:17:38,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2023-03-31 22:17:38,625 INFO L180 IcfgInterpreter]: Interpretation finished