/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 OctagonDomain -i ../sv-benchmarks/c/float-benchs/float_int_inv_square.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:20:06,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:20:06,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:20:06,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:20:06,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:20:06,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:20:06,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:20:06,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:20:06,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:20:06,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:20:06,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:20:06,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:20:06,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:20:06,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:20:06,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:20:06,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:20:06,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:20:06,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:20:06,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:20:06,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:20:06,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:20:06,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:20:06,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:20:06,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:20:06,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:20:06,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:20:06,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:20:06,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:20:06,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:20:06,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:20:06,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:20:06,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:20:06,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:20:06,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:20:06,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:20:06,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:20:06,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:20:06,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:20:06,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:20:06,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:20:06,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:20:06,828 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 [2023-04-02 21:20:06,853 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:20:06,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:20:06,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:20:06,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:20:06,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:20:06,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:20:06,855 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:20:06,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:20:06,855 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:20:06,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:20:06,856 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:20:06,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:20:06,856 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:20:06,856 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:20:06,856 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:20:06,856 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:20:06,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:20:06,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:20:06,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:06,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:20:06,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:20:06,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:20:06,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:20:06,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:20:06,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:20:06,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:20:06,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:20:07,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:20:07,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:20:07,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:20:07,061 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:20:07,061 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:20:07,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2023-04-02 21:20:08,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:20:08,303 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:20:08,303 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2023-04-02 21:20:08,307 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf0cf0a/56d69abf475b45a1a8faad4026818b52/FLAGdd82f376e [2023-04-02 21:20:08,316 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf0cf0a/56d69abf475b45a1a8faad4026818b52 [2023-04-02 21:20:08,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:20:08,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:20:08,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:08,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:20:08,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:20:08,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad0e955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08, skipping insertion in model container [2023-04-02 21:20:08,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:20:08,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:20:08,421 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-benchs/float_int_inv_square.c[488,501] [2023-04-02 21:20:08,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:08,434 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:20:08,441 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-benchs/float_int_inv_square.c[488,501] [2023-04-02 21:20:08,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:08,451 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:20:08,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08 WrapperNode [2023-04-02 21:20:08,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:08,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:20:08,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:20:08,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:20:08,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:20:08,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:20:08,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:20:08,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:20:08,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (1/1) ... [2023-04-02 21:20:08,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:08,502 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) [2023-04-02 21:20:08,506 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 [2023-04-02 21:20:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:20:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:20:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:20:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:20:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:20:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:20:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:20:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:20:08,608 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:20:08,615 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:20:08,702 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:20:08,715 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:20:08,715 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 21:20:08,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:08 BoogieIcfgContainer [2023-04-02 21:20:08,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:20:08,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:20:08,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:20:08,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:20:08,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:20:08" (1/3) ... [2023-04-02 21:20:08,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6eb2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:08, skipping insertion in model container [2023-04-02 21:20:08,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:08" (2/3) ... [2023-04-02 21:20:08,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6eb2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:08, skipping insertion in model container [2023-04-02 21:20:08,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:08" (3/3) ... [2023-04-02 21:20:08,723 INFO L112 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2023-04-02 21:20:08,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:20:08,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:20:08,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:20:08,774 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;@43cde171, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:20:08,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:20:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 21:20:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 21:20:08,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:08,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:08,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:08,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1011376337, now seen corresponding path program 1 times [2023-04-02 21:20:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914537671] [2023-04-02 21:20:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:08,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:08,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 21:20:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:08,899 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 21:20:08,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 21:20:08,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:20:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:20:08,928 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-02 21:20:08,932 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:20:08,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:20:08 BoogieIcfgContainer [2023-04-02 21:20:08,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:20:08,945 INFO L158 Benchmark]: Toolchain (without parser) took 626.15ms. Allocated memory is still 203.4MB. Free memory was 157.3MB in the beginning and 120.2MB in the end (delta: 37.0MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2023-04-02 21:20:08,946 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 203.4MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:20:08,946 INFO L158 Benchmark]: CACSL2BoogieTranslator took 132.33ms. Allocated memory is still 203.4MB. Free memory was 157.3MB in the beginning and 147.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:20:08,950 INFO L158 Benchmark]: Boogie Preprocessor took 17.31ms. Allocated memory is still 203.4MB. Free memory was 147.1MB in the beginning and 145.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 21:20:08,951 INFO L158 Benchmark]: RCFGBuilder took 246.80ms. Allocated memory is still 203.4MB. Free memory was 145.7MB in the beginning and 135.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:20:08,951 INFO L158 Benchmark]: TraceAbstraction took 226.12ms. Allocated memory is still 203.4MB. Free memory was 134.6MB in the beginning and 120.2MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 21:20:08,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 203.4MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 132.33ms. Allocated memory is still 203.4MB. Free memory was 157.3MB in the beginning and 147.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.31ms. Allocated memory is still 203.4MB. Free memory was 147.1MB in the beginning and 145.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.80ms. Allocated memory is still 203.4MB. Free memory was 145.7MB in the beginning and 135.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 226.12ms. Allocated memory is still 203.4MB. Free memory was 134.6MB in the beginning and 120.2MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. 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: 11]: 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L19] CALL assume_abort_if_not(x >= -10 && x <= 10) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) [L19] RET assume_abort_if_not(x >= -10 && x <= 10) VAL [x=-10] [L21] y = x*x - 4.f VAL [x=-10] [L22] CALL __VERIFIER_assert(y != 0.f) VAL [\old(cond)=0] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L11] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 [2023-04-02 21:20:08,989 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...