/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/float-newlib/float_req_bl_1231.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:47:08,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:47:08,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:47:08,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:47:08,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:47:08,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:47:08,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:47:08,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:47:08,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:47:08,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:47:08,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:47:08,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:47:08,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:47:08,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:47:08,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:47:08,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:47:08,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:47:08,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:47:08,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:47:08,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:47:08,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:47:08,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:47:08,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:47:08,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:47:08,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:47:08,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:47:08,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:47:08,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:47:08,955 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 22:47:08,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:47:08,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:47:08,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:47:08,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:47:08,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:47:08,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:47:08,971 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:47:08,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:47:08,972 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:47:08,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:47:08,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:47:08,973 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:47:08,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:47:08,973 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:47:08,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:47:08,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:47:08,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:47:08,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:47:08,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:47:08,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:47:08,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:47:08,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:47:08,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:47:09,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:47:09,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:47:09,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:47:09,202 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:47:09,204 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:47:09,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2023-03-31 22:47:10,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:47:10,701 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:47:10,702 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2023-03-31 22:47:10,708 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9b22210/fdace5863abe4d2f97f63a79d5714ae4/FLAG20951553b [2023-03-31 22:47:10,720 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9b22210/fdace5863abe4d2f97f63a79d5714ae4 [2023-03-31 22:47:10,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:47:10,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:47:10,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:47:10,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:47:10,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:47:10,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557ed3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10, skipping insertion in model container [2023-03-31 22:47:10,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:47:10,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:47:10,877 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/float-newlib/float_req_bl_1231.c[1835,1848] [2023-03-31 22:47:10,881 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/float-newlib/float_req_bl_1231.c[1994,2007] [2023-03-31 22:47:10,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:47:10,891 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:47:10,910 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/float-newlib/float_req_bl_1231.c[1835,1848] [2023-03-31 22:47:10,911 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/float-newlib/float_req_bl_1231.c[1994,2007] [2023-03-31 22:47:10,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:47:10,924 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:47:10,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10 WrapperNode [2023-03-31 22:47:10,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:47:10,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:47:10,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:47:10,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:47:10,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:47:10,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:47:10,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:47:10,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:47:10,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (1/1) ... [2023-03-31 22:47:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:47:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:47:10,999 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 22:47:11,001 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 22:47:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:47:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:47:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:47:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2023-03-31 22:47:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2023-03-31 22:47:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2023-03-31 22:47:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2023-03-31 22:47:11,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:47:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:47:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:47:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:47:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2023-03-31 22:47:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-03-31 22:47:11,101 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:47:11,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:47:11,408 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:47:11,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:47:11,516 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 22:47:11,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:47:11 BoogieIcfgContainer [2023-03-31 22:47:11,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:47:11,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:47:11,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:47:11,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:47:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:47:10" (1/3) ... [2023-03-31 22:47:11,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:47:11, skipping insertion in model container [2023-03-31 22:47:11,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:47:10" (2/3) ... [2023-03-31 22:47:11,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:47:11, skipping insertion in model container [2023-03-31 22:47:11,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:47:11" (3/3) ... [2023-03-31 22:47:11,523 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2023-03-31 22:47:11,536 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:47:11,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-03-31 22:47:11,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:47:11,604 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;@44e5bb75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:47:11,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-03-31 22:47:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 38 states have internal predecessors, (49), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 22:47:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 22:47:11,615 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:47:11,616 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:47:11,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:47:11,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:47:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1730938136, now seen corresponding path program 1 times [2023-03-31 22:47:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:47:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95668686] [2023-03-31 22:47:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:47:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:47:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:47:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:47:11,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:47:11,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95668686] [2023-03-31 22:47:11,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95668686] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:47:11,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:47:11,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:47:11,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108520170] [2023-03-31 22:47:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:47:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:47:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:47:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:47:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:47:11,905 INFO L87 Difference]: Start difference. First operand has 57 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 38 states have internal predecessors, (49), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:47:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:47:11,938 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-03-31 22:47:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:47:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-03-31 22:47:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:47:11,947 INFO L225 Difference]: With dead ends: 92 [2023-03-31 22:47:11,947 INFO L226 Difference]: Without dead ends: 52 [2023-03-31 22:47:11,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:47:11,953 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:47:11,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:47:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-03-31 22:47:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-03-31 22:47:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 22:47:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-03-31 22:47:11,991 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2023-03-31 22:47:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:47:11,992 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-03-31 22:47:11,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:47:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-03-31 22:47:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:47:11,994 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:47:11,995 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:47:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:47:11,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:47:11,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:47:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1340493508, now seen corresponding path program 1 times [2023-03-31 22:47:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:47:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120369489] [2023-03-31 22:47:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:47:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:47:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:47:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:47:12,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:47:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120369489] [2023-03-31 22:47:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120369489] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:47:12,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:47:12,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:47:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92291489] [2023-03-31 22:47:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:47:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:47:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:47:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:47:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:47:12,111 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:47:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:47:12,164 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2023-03-31 22:47:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:47:12,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-03-31 22:47:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:47:12,166 INFO L225 Difference]: With dead ends: 95 [2023-03-31 22:47:12,167 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 22:47:12,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:47:12,168 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:47:12,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 164 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:47:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 22:47:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2023-03-31 22:47:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 22:47:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-03-31 22:47:12,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 33 [2023-03-31 22:47:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:47:12,180 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-03-31 22:47:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:47:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-03-31 22:47:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 22:47:12,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:47:12,181 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:12,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:47:12,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:47:12,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:47:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash 232436395, now seen corresponding path program 1 times [2023-03-31 22:47:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:47:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26541303] [2023-03-31 22:47:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:47:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:47:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:47:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:47:12,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:47:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26541303] [2023-03-31 22:47:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26541303] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:47:12,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:47:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:47:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217821157] [2023-03-31 22:47:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:47:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:47:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:47:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:47:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:47:12,250 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:47:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:47:12,274 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-03-31 22:47:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:47:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2023-03-31 22:47:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:47:12,275 INFO L225 Difference]: With dead ends: 57 [2023-03-31 22:47:12,275 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 22:47:12,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:47:12,277 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:47:12,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:47:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 22:47:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-03-31 22:47:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 22:47:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-03-31 22:47:12,285 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2023-03-31 22:47:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:47:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-03-31 22:47:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 22:47:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-03-31 22:47:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:47:12,287 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:47:12,287 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:47:12,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:47:12,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:47:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1233793449, now seen corresponding path program 1 times [2023-03-31 22:47:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:47:12,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415519007] [2023-03-31 22:47:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:47:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:47:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:47:12,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:47:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:47:12,370 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:47:12,371 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:47:12,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-03-31 22:47:12,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-03-31 22:47:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:47:12,376 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-03-31 22:47:12,379 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:47:12,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:47:12 BoogieIcfgContainer [2023-03-31 22:47:12,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:47:12,401 INFO L158 Benchmark]: Toolchain (without parser) took 1678.40ms. Allocated memory is still 268.4MB. Free memory was 230.3MB in the beginning and 130.2MB in the end (delta: 100.1MB). Peak memory consumption was 99.6MB. Max. memory is 8.0GB. [2023-03-31 22:47:12,401 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:47:12,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.15ms. Allocated memory is still 268.4MB. Free memory was 230.3MB in the beginning and 219.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 22:47:12,402 INFO L158 Benchmark]: Boogie Preprocessor took 31.75ms. Allocated memory is still 268.4MB. Free memory was 219.4MB in the beginning and 217.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:47:12,403 INFO L158 Benchmark]: RCFGBuilder took 559.98ms. Allocated memory is still 268.4MB. Free memory was 217.3MB in the beginning and 194.1MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-03-31 22:47:12,403 INFO L158 Benchmark]: TraceAbstraction took 881.69ms. Allocated memory is still 268.4MB. Free memory was 193.6MB in the beginning and 130.2MB in the end (delta: 63.4MB). Peak memory consumption was 62.9MB. Max. memory is 8.0GB. [2023-03-31 22:47:12,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.15ms. Allocated memory is still 268.4MB. Free memory was 230.3MB in the beginning and 219.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.75ms. Allocated memory is still 268.4MB. Free memory was 219.4MB in the beginning and 217.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 559.98ms. Allocated memory is still 268.4MB. Free memory was 217.3MB in the beginning and 194.1MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 881.69ms. Allocated memory is still 268.4MB. Free memory was 193.6MB in the beginning and 130.2MB in the end (delta: 63.4MB). Peak memory consumption was 62.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 77]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 76. Possible FailurePath: [L68] float x = __VERIFIER_nondet_float(); [L69] float y = __VERIFIER_nondet_float(); [L70] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578698] [L59] return x != x; [L70] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578698] [L70] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, x=4286578698] [L70] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578699] [L59] return x != x; [L70] RET, EXPR isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, isnan_float(y)=0, x=4286578698, y=4286578699] [L70] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, isnan_float(y)=0, x=4286578698, y=4286578699] [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, isnan_float(y)=0, x=4286578698, y=4286578699] [L70-L71] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L73] CALL, EXPR fmin_float(x, y) VAL [\old(x)=4286578698, \old(y)=4286578699] [L38] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578698] [L15] __uint32_t w; VAL [\old(x)=4286578698, x=4286578698] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578698, \old(y)=4286578699, __fpclassify_float(x)=0, x=4286578698, y=4286578699] [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; VAL [\old(x)=4286578698, \old(y)=4286578699, \result=4286578699, x=4286578698, y=4286578699] [L73] RET, EXPR fmin_float(x, y) VAL [fmin_float(x, y)=4286578699, x=4286578698, y=4286578699] [L73] float res = fmin_float(x, y); [L76] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578698] [L59] return x != x; [L76] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578699, x=4286578698, y=4286578699] [L76] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, res=4286578699, x=4286578698, y=4286578699] [L76] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578699] [L59] return x != x; [L76] RET, EXPR isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, isnan_float(y)=0, res=4286578699, x=4286578698, y=4286578699] [L76] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x) && !isnan_float(y)=1, isnan_float(x)=1, isnan_float(y)=0, res=4286578699, x=4286578698, y=4286578699] [L76] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L77] reach_error() VAL [res=4286578699, x=4286578698, y=4286578699] - UnprovableResult [Line: 83]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 64 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 346 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 160 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41 IncrementalHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 186 mSDtfsCounter, 41 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 102 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-03-31 22:47:12,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...