/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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:31:19,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:31:19,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:31:19,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:31:19,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:31:19,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:31:19,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:31:19,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:31:19,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:31:19,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:31:19,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:31:19,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:31:19,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:31:19,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:31:19,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:31:19,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:31:19,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:31:19,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:31:19,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:31:19,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:31:19,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:31:19,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:31:19,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:31:19,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:31:19,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:31:19,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:31:19,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:31:19,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:31:19,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:31:19,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:31:19,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:31:19,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:31:19,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:31:19,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:31:19,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:31:19,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:31:19,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:31:19,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:31:19,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:31:19,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:31:19,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:31:19,948 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 22:31:19,979 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:31:19,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:31:19,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:31:19,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:31:19,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:31:19,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:31:19,981 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:31:19,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:31:19,981 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:31:19,981 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:31:19,982 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:31:19,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:31:19,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:31:19,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:31:19,982 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:31:19,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:31:19,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:31:19,983 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:31:19,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:31:19,983 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:31:19,984 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:31:19,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:31:19,985 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:31:19,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:31:19,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:31:19,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:31:19,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:19,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:31:19,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:31:19,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:31:20,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:31:20,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:31:20,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:31:20,253 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:31:20,254 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:31:20,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2023-03-31 22:31:21,453 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:31:22,069 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:31:22,070 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2023-03-31 22:31:22,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50911d97/8e3424f0301b417cabe687c3d3bd6055/FLAGd3160e9ba [2023-03-31 22:31:22,152 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50911d97/8e3424f0301b417cabe687c3d3bd6055 [2023-03-31 22:31:22,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:31:22,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:31:22,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:22,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:31:22,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:31:22,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:22" (1/1) ... [2023-03-31 22:31:22,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa65b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:22, skipping insertion in model container [2023-03-31 22:31:22,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:22" (1/1) ... [2023-03-31 22:31:22,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:31:22,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:31:22,662 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_label27.c[3867,3880] [2023-03-31 22:31:23,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:23,840 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:31:23,854 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_label27.c[3867,3880] [2023-03-31 22:31:24,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:24,532 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:31:24,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24 WrapperNode [2023-03-31 22:31:24,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:24,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:31:24,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:31:24,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:31:24,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:24,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:31:24,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:31:24,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:31:24,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:31:24,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (1/1) ... [2023-03-31 22:31:25,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:25,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:31:25,114 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 22:31:25,139 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 22:31:25,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:31:25,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:31:25,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:31:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:31:25,306 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:31:25,308 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:31:32,650 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:31:46,982 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:31:46,983 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:31:46,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:31:46 BoogieIcfgContainer [2023-03-31 22:31:46,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:31:46,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:31:46,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:31:46,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:31:46,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:31:22" (1/3) ... [2023-03-31 22:31:46,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eedc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:31:46, skipping insertion in model container [2023-03-31 22:31:46,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:24" (2/3) ... [2023-03-31 22:31:46,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eedc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:31:46, skipping insertion in model container [2023-03-31 22:31:46,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:31:46" (3/3) ... [2023-03-31 22:31:46,995 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label27.c [2023-03-31 22:31:47,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:31:47,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:31:47,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:31:47,092 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;@30414b24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:31:47,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:31:47,100 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 22:31:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:31:47,108 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:47,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:31:47,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:47,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1432410820, now seen corresponding path program 1 times [2023-03-31 22:31:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:47,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453840946] [2023-03-31 22:31:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:47,505 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 22:31:47,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453840946] [2023-03-31 22:31:47,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453840946] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:47,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:31:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389698897] [2023-03-31 22:31:47,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:47,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:31:47,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:31:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:31:47,578 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 22:31:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:31:53,786 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:31:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:31:53,788 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 22:31:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:31:53,818 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:31:53,818 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:31:53,827 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 22:31:53,830 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:31:53,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-31 22:31:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:31:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:31:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 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 22:31:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-03-31 22:31:53,958 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-03-31 22:31:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:31:53,959 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-03-31 22:31:53,960 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 22:31:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-03-31 22:31:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:31:53,962 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:31:53,962 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 22:31:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:31:53,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:31:53,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:31:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2072141074, now seen corresponding path program 1 times [2023-03-31 22:31:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:31:53,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308015470] [2023-03-31 22:31:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:31:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:31:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:31:54,217 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 22:31:54,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:31:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308015470] [2023-03-31 22:31:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308015470] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:31:54,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:31:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:31:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131837860] [2023-03-31 22:31:54,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:31:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:31:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:31:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:31:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:31:54,223 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 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 22:32:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:03,131 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-03-31 22:32:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:03,132 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 22:32:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:03,152 INFO L225 Difference]: With dead ends: 6943 [2023-03-31 22:32:03,152 INFO L226 Difference]: Without dead ends: 4679 [2023-03-31 22:32:03,157 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 22:32:03,159 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:03,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-03-31 22:32:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-03-31 22:32:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-03-31 22:32:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-03-31 22:32:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-03-31 22:32:03,294 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-03-31 22:32:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:03,295 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-03-31 22:32:03,295 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 22:32:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-03-31 22:32:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:32:03,296 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:03,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:03,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:32:03,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:03,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -395762627, now seen corresponding path program 1 times [2023-03-31 22:32:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328464273] [2023-03-31 22:32:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:03,486 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 22:32:03,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328464273] [2023-03-31 22:32:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328464273] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:03,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:03,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:03,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679650442] [2023-03-31 22:32:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:03,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:03,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:03,492 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:32:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:09,845 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-03-31 22:32:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:32:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-03-31 22:32:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:09,888 INFO L225 Difference]: With dead ends: 14148 [2023-03-31 22:32:09,888 INFO L226 Difference]: Without dead ends: 9546 [2023-03-31 22:32:09,900 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 22:32:09,901 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:09,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-31 22:32:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-03-31 22:32:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-03-31 22:32:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-03-31 22:32:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-03-31 22:32:10,130 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-03-31 22:32:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:10,130 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-03-31 22:32:10,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:32:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-03-31 22:32:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:32:10,132 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:10,132 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] [2023-03-31 22:32:10,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:32:10,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:10,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2049768499, now seen corresponding path program 1 times [2023-03-31 22:32:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:10,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902730356] [2023-03-31 22:32:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:10,267 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 22:32:10,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:10,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902730356] [2023-03-31 22:32:10,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902730356] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:10,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:10,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990507034] [2023-03-31 22:32:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:10,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:10,271 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)