/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/Problem19_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:32:04,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:32:04,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:32:05,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:32:05,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:32:05,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:32:05,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:32:05,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:32:05,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:32:05,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:32:05,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:32:05,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:32:05,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:32:05,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:32:05,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:32:05,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:32:05,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:32:05,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:32:05,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:32:05,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:32:05,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:32:05,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:32:05,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:32:05,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:32:05,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:32:05,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:32:05,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:32:05,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:32:05,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:32:05,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:32:05,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:32:05,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:32:05,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:32:05,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:32:05,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:32:05,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:32:05,040 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 22:32:05,066 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:32:05,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:32:05,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:32:05,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:32:05,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:32:05,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:32:05,069 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:32:05,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:32:05,069 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:32:05,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:32:05,070 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:32:05,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:32:05,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:32:05,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:32:05,070 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:32:05,071 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:32:05,071 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:32:05,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:32:05,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:32:05,071 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:32:05,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:32:05,073 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:32:05,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:32:05,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:32:05,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:32:05,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:05,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:32:05,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:32:05,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:32:05,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:32:05,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:32:05,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:32:05,309 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:32:05,310 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:32:05,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label38.c [2023-03-31 22:32:06,557 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:32:07,107 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:32:07,108 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label38.c [2023-03-31 22:32:07,156 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6d9af6e/8fcaabc20a0d404ebc95be3a534af24a/FLAG4f18806fc [2023-03-31 22:32:07,172 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6d9af6e/8fcaabc20a0d404ebc95be3a534af24a [2023-03-31 22:32:07,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:32:07,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:32:07,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:07,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:32:07,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:32:07,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:07" (1/1) ... [2023-03-31 22:32:07,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5c93d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:07, skipping insertion in model container [2023-03-31 22:32:07,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:32:07" (1/1) ... [2023-03-31 22:32:07,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:32:07,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:32:07,705 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/Problem19_label38.c[7658,7671] [2023-03-31 22:32:08,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:08,838 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:32:08,869 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/Problem19_label38.c[7658,7671] [2023-03-31 22:32:09,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:32:09,704 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:32:09,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09 WrapperNode [2023-03-31 22:32:09,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:32:09,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:32:09,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:32:09,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:32:09,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:09,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:09,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:09,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:32:10,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:32:10,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:32:10,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:32:10,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (1/1) ... [2023-03-31 22:32:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:32:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:32:10,200 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 22:32:10,221 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 22:32:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:32:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:32:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:32:10,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:32:10,240 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:32:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:32:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:32:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:32:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:32:10,432 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:32:10,434 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:32:17,627 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:32:32,309 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:32:32,309 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:32:32,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:32 BoogieIcfgContainer [2023-03-31 22:32:32,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:32:32,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:32:32,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:32:32,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:32:32,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:32:07" (1/3) ... [2023-03-31 22:32:32,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784bad89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:32, skipping insertion in model container [2023-03-31 22:32:32,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:32:09" (2/3) ... [2023-03-31 22:32:32,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784bad89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:32, skipping insertion in model container [2023-03-31 22:32:32,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:32" (3/3) ... [2023-03-31 22:32:32,322 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label38.c [2023-03-31 22:32:32,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:32:32,339 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:32:32,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:32:32,417 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;@7c2f4639, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:32:32,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:32:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:32:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:32:32,437 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:32,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:32,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:32,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1235905507, now seen corresponding path program 1 times [2023-03-31 22:32:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:32,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745516949] [2023-03-31 22:32:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:32,863 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 22:32:32,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745516949] [2023-03-31 22:32:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745516949] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:32,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:32:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331989582] [2023-03-31 22:32:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:32,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:32:32,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:32:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:32:32,915 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 22:32:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:39,244 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:32:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:32:39,250 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 22:32:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:39,282 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:32:39,282 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:32:39,290 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 22:32:39,293 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1291 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:39,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 251 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-31 22:32:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:32:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2267. [2023-03-31 22:32:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2241 states have (on average 1.892904953145917) internal successors, (4242), 2241 states have internal predecessors, (4242), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:32:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4277 transitions. [2023-03-31 22:32:39,470 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4277 transitions. Word has length 11 [2023-03-31 22:32:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:39,471 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 4277 transitions. [2023-03-31 22:32:39,471 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 22:32:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4277 transitions. [2023-03-31 22:32:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:32:39,474 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:39,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:32:39,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:39,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1787359842, now seen corresponding path program 1 times [2023-03-31 22:32:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742272318] [2023-03-31 22:32:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:39,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:39,735 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 22:32:39,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742272318] [2023-03-31 22:32:39,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742272318] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:39,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:39,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249948299] [2023-03-31 22:32:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:39,741 INFO L87 Difference]: Start difference. First operand 2267 states and 4277 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:32:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:48,231 INFO L93 Difference]: Finished difference Result 6937 states and 13090 transitions. [2023-03-31 22:32:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-03-31 22:32:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:48,262 INFO L225 Difference]: With dead ends: 6937 [2023-03-31 22:32:48,262 INFO L226 Difference]: Without dead ends: 4675 [2023-03-31 22:32:48,271 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 22:32:48,274 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4003 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:48,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 178 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-03-31 22:32:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2023-03-31 22:32:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4604. [2023-03-31 22:32:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4526 states have (on average 1.5733539549270878) internal successors, (7121), 4533 states have internal predecessors, (7121), 23 states have call successors, (23), 23 states have call predecessors, (23), 54 states have return successors, (142), 47 states have call predecessors, (142), 22 states have call successors, (142) [2023-03-31 22:32:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7286 transitions. [2023-03-31 22:32:48,439 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7286 transitions. Word has length 21 [2023-03-31 22:32:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:48,439 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7286 transitions. [2023-03-31 22:32:48,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 22:32:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7286 transitions. [2023-03-31 22:32:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 22:32:48,440 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:48,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:48,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:32:48,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:48,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2090196689, now seen corresponding path program 1 times [2023-03-31 22:32:48,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:48,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511955578] [2023-03-31 22:32:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:48,659 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 22:32:48,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:48,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511955578] [2023-03-31 22:32:48,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511955578] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:48,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:48,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081338426] [2023-03-31 22:32:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:48,662 INFO L87 Difference]: Start difference. First operand 4604 states and 7286 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22:32:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:55,114 INFO L93 Difference]: Finished difference Result 12915 states and 21078 transitions. [2023-03-31 22:32:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:32:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-03-31 22:32:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:55,150 INFO L225 Difference]: With dead ends: 12915 [2023-03-31 22:32:55,150 INFO L226 Difference]: Without dead ends: 8316 [2023-03-31 22:32:55,162 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 22:32:55,163 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3658 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3658 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:55,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3658 Valid, 159 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-03-31 22:32:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2023-03-31 22:32:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 8220. [2023-03-31 22:32:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8029 states have (on average 1.5387968613775065) internal successors, (12355), 8053 states have internal predecessors, (12355), 38 states have call successors, (38), 38 states have call predecessors, (38), 152 states have return successors, (540), 128 states have call predecessors, (540), 37 states have call successors, (540) [2023-03-31 22:32:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 12933 transitions. [2023-03-31 22:32:55,357 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 12933 transitions. Word has length 24 [2023-03-31 22:32:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:55,358 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 12933 transitions. [2023-03-31 22:32:55,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22:32:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 12933 transitions. [2023-03-31 22:32:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:32:55,359 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:55,360 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] [2023-03-31 22:32:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:32:55,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:55,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1865112641, now seen corresponding path program 1 times [2023-03-31 22:32:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:55,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481534603] [2023-03-31 22:32:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:55,557 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 22:32:55,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:55,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481534603] [2023-03-31 22:32:55,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481534603] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:55,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:55,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078544151] [2023-03-31 22:32:55,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:55,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:55,560 INFO L87 Difference]: Start difference. First operand 8220 states and 12933 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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)