/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/bitvector/soft_float_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:48:42,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:48:42,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:48:42,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:48:42,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:48:42,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:48:42,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:48:42,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:48:42,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:48:42,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:48:42,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:48:42,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:48:42,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:48:42,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:48:42,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:48:42,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:48:42,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:48:42,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:48:42,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:48:42,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:48:42,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:48:42,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:48:42,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:48:42,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:48:42,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:48:42,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:48:42,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:48:42,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:48:42,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:48:42,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:48:42,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:48:42,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:48:42,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:48:42,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:48:42,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:48:42,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:48:42,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:48:42,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:48:42,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:48:42,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:48:42,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:48:42,794 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 15:48:42,825 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:48:42,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:48:42,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:48:42,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:48:42,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:48:42,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:48:42,827 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:48:42,827 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:48:42,827 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:48:42,827 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:48:42,828 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:48:42,828 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:48:42,828 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:48:42,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:48:42,828 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:48:42,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:48:42,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:48:42,829 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:48:42,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:48:42,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:48:42,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:48:42,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:48:42,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:48:42,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:48:42,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:48:42,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:48:42,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:48:42,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:42,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:48:42,832 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:48:42,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:48:42,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:48:42,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:48:42,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:48:42,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:48:42,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:48:42,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:48:43,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:48:43,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:48:43,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:48:43,123 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:48:43,124 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:48:43,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-04-02 15:48:44,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:48:44,619 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:48:44,620 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-04-02 15:48:44,626 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f35bac11/76a7430751a24709bdf50396d0ccbeec/FLAGfbcd7217f [2023-04-02 15:48:44,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f35bac11/76a7430751a24709bdf50396d0ccbeec [2023-04-02 15:48:44,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:48:44,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:48:44,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:44,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:48:44,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:48:44,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5423cb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44, skipping insertion in model container [2023-04-02 15:48:44,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:48:44,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:48:44,845 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-04-02 15:48:44,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:44,911 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:48:44,922 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-04-02 15:48:44,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:44,985 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:48:44,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44 WrapperNode [2023-04-02 15:48:44,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:44,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:48:44,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:48:44,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:48:44,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:48:45,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:48:45,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:48:45,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:48:45,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:45,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:45,094 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 15:48:45,099 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 15:48:45,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:48:45,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:48:45,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:48:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:48:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-02 15:48:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-02 15:48:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-02 15:48:45,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:48:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:48:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:48:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:48:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:48:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:48:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:48:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:48:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:48:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:48:45,223 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:48:45,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:48:45,636 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:48:45,883 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:48:45,883 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 15:48:45,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:45 BoogieIcfgContainer [2023-04-02 15:48:45,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:48:45,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:48:45,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:48:45,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:48:45,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:48:44" (1/3) ... [2023-04-02 15:48:45,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252fa707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:45, skipping insertion in model container [2023-04-02 15:48:45,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (2/3) ... [2023-04-02 15:48:45,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252fa707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:45, skipping insertion in model container [2023-04-02 15:48:45,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:45" (3/3) ... [2023-04-02 15:48:45,892 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-04-02 15:48:45,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:48:45,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:48:45,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:48:45,962 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;@1ecde507, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:48:45,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:48:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 40 states have (on average 1.5) internal successors, (60), 42 states have internal predecessors, (60), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 15:48:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 15:48:45,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:45,976 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-04-02 15:48:45,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:45,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash -790343142, now seen corresponding path program 1 times [2023-04-02 15:48:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:45,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294328577] [2023-04-02 15:48:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:46,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294328577] [2023-04-02 15:48:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294328577] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602660321] [2023-04-02 15:48:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:46,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:46,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:48:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:46,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 15:48:46,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 15:48:46,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:48:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602660321] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:47,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451642098] [2023-04-02 15:48:47,253 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:48:47,253 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:47,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:47,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:47,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:47,314 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:47,382 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 16 for LOIs [2023-04-02 15:48:47,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:47,414 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [451642098] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 15, 13] total 37 [2023-04-02 15:48:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488602675] [2023-04-02 15:48:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:48:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:48:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 15:48:47,973 INFO L87 Difference]: Start difference. First operand has 57 states, 40 states have (on average 1.5) internal successors, (60), 42 states have internal predecessors, (60), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 15:48:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:49,093 INFO L93 Difference]: Finished difference Result 118 states and 176 transitions. [2023-04-02 15:48:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:48:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-04-02 15:48:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:49,102 INFO L225 Difference]: With dead ends: 118 [2023-04-02 15:48:49,102 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 15:48:49,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:48:49,111 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 212 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:49,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 10 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:48:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 15:48:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-04-02 15:48:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 43 states have internal predecessors, (57), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 15:48:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-04-02 15:48:49,158 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 40 [2023-04-02 15:48:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:49,159 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-04-02 15:48:49,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 15:48:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-04-02 15:48:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 15:48:49,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:49,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-04-02 15:48:49,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 15:48:49,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:49,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1920002451, now seen corresponding path program 1 times [2023-04-02 15:48:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167450434] [2023-04-02 15:48:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:49,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167450434] [2023-04-02 15:48:49,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167450434] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805851471] [2023-04-02 15:48:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:49,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:49,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:49,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:48:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:49,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 15:48:49,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 15:48:49,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:48:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805851471] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539021376] [2023-04-02 15:48:50,082 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 15:48:50,082 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:50,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:50,083 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:50,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:50,107 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:50,380 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:48:50,406 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:48:50,426 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:50,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:50,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:52,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '885#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:48:52,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:52,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:52,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 13] total 28 [2023-04-02 15:48:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018482117] [2023-04-02 15:48:52,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:52,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 15:48:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 15:48:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 15:48:52,010 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 15:48:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:52,630 INFO L93 Difference]: Finished difference Result 154 states and 207 transitions. [2023-04-02 15:48:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 15:48:52,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2023-04-02 15:48:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:52,634 INFO L225 Difference]: With dead ends: 154 [2023-04-02 15:48:52,634 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 15:48:52,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=3374, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 15:48:52,637 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:52,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 606 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:48:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 15:48:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2023-04-02 15:48:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 51 states have internal predecessors, (64), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 15:48:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2023-04-02 15:48:52,664 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 45 [2023-04-02 15:48:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:52,664 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2023-04-02 15:48:52,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 15:48:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2023-04-02 15:48:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 15:48:52,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:52,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:52,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:52,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 15:48:52,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:52,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash -922676739, now seen corresponding path program 1 times [2023-04-02 15:48:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448892984] [2023-04-02 15:48:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:52,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448892984] [2023-04-02 15:48:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448892984] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088775033] [2023-04-02 15:48:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:52,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:52,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:52,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:48:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:53,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:48:53,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 15:48:53,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088775033] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262597892] [2023-04-02 15:48:53,138 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 15:48:53,138 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:53,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:53,138 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:53,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:53,161 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:53,429 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 15:48:53,433 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 13 for LOIs [2023-04-02 15:48:53,437 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:53,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:53,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:54,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1537#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:48:54,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:54,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:54,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-02 15:48:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729908067] [2023-04-02 15:48:54,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:54,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:48:54,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:48:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 15:48:54,385 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:48:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:54,647 INFO L93 Difference]: Finished difference Result 167 states and 236 transitions. [2023-04-02 15:48:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:48:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 47 [2023-04-02 15:48:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:54,653 INFO L225 Difference]: With dead ends: 167 [2023-04-02 15:48:54,654 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 15:48:54,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 15:48:54,664 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:54,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 193 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:48:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 15:48:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2023-04-02 15:48:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 59 states have internal predecessors, (74), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 15:48:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2023-04-02 15:48:54,719 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 47 [2023-04-02 15:48:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:54,720 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2023-04-02 15:48:54,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:48:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2023-04-02 15:48:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 15:48:54,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:54,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:54,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:54,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:54,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:54,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2125800696, now seen corresponding path program 1 times [2023-04-02 15:48:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033746776] [2023-04-02 15:48:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:55,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033746776] [2023-04-02 15:48:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033746776] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981056383] [2023-04-02 15:48:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:55,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:55,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:48:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:55,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 15:48:55,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 15:48:55,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 15:48:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981056383] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:55,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:48:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 12] total 21 [2023-04-02 15:48:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228217475] [2023-04-02 15:48:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:55,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:48:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:48:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-02 15:48:55,944 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:48:56,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:56,133 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2023-04-02 15:48:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:48:56,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2023-04-02 15:48:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:56,135 INFO L225 Difference]: With dead ends: 93 [2023-04-02 15:48:56,135 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 15:48:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-04-02 15:48:56,136 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:48:56,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 284 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:48:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 15:48:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2023-04-02 15:48:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 62 states have internal predecessors, (76), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-04-02 15:48:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2023-04-02 15:48:56,170 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 49 [2023-04-02 15:48:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:56,172 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2023-04-02 15:48:56,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:48:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2023-04-02 15:48:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 15:48:56,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:56,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:48:56,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 15:48:56,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:56,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:56,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash 285984370, now seen corresponding path program 1 times [2023-04-02 15:48:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775892006] [2023-04-02 15:48:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:56,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:56,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775892006] [2023-04-02 15:48:56,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775892006] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:56,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023077184] [2023-04-02 15:48:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:56,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:48:56,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:48:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:56,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 15:48:56,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:48:56,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 15:48:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023077184] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:57,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523985112] [2023-04-02 15:48:57,847 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-04-02 15:48:57,847 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:57,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:57,847 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:57,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:57,864 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:58,041 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:48:58,056 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:48:58,067 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:58,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:58,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:59,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2823#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:48:59,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:59,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:59,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 14] total 32 [2023-04-02 15:48:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435864973] [2023-04-02 15:48:59,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 15:48:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 15:48:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 15:48:59,743 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 15:49:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:02,392 INFO L93 Difference]: Finished difference Result 250 states and 416 transitions. [2023-04-02 15:49:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-02 15:49:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) Word has length 52 [2023-04-02 15:49:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:02,395 INFO L225 Difference]: With dead ends: 250 [2023-04-02 15:49:02,395 INFO L226 Difference]: Without dead ends: 196 [2023-04-02 15:49:02,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1132, Invalid=10424, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 15:49:02,400 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 218 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:02,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 532 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 15:49:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-04-02 15:49:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 90. [2023-04-02 15:49:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 71 states have internal predecessors, (86), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-04-02 15:49:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2023-04-02 15:49:02,473 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 52 [2023-04-02 15:49:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:02,473 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2023-04-02 15:49:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 15:49:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2023-04-02 15:49:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 15:49:02,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:02,474 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:02,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:02,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:02,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:02,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -185911285, now seen corresponding path program 1 times [2023-04-02 15:49:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778328308] [2023-04-02 15:49:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:02,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778328308] [2023-04-02 15:49:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778328308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655537116] [2023-04-02 15:49:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:02,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:02,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:02,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:02,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:49:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:02,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 15:49:02,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:49:03,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 15:49:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655537116] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942634365] [2023-04-02 15:49:03,626 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 15:49:03,626 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:03,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:03,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:03,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:03,641 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:03,832 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-02 15:49:03,848 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:49:03,921 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:03,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:04,004 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:05,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3810#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:05,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:05,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:05,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2023-04-02 15:49:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248948963] [2023-04-02 15:49:05,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:05,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 15:49:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 15:49:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 15:49:05,405 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-02 15:49:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:06,189 INFO L93 Difference]: Finished difference Result 177 states and 249 transitions. [2023-04-02 15:49:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 15:49:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 56 [2023-04-02 15:49:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:06,191 INFO L225 Difference]: With dead ends: 177 [2023-04-02 15:49:06,191 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 15:49:06,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=386, Invalid=4036, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 15:49:06,193 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 97 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:06,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 543 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:49:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 15:49:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2023-04-02 15:49:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.28125) internal successors, (82), 67 states have internal predecessors, (82), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 15:49:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2023-04-02 15:49:06,214 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 56 [2023-04-02 15:49:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:06,214 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2023-04-02 15:49:06,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-02 15:49:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2023-04-02 15:49:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 15:49:06,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:06,215 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:06,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:06,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:06,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:06,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1256209865, now seen corresponding path program 1 times [2023-04-02 15:49:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:06,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681181301] [2023-04-02 15:49:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:06,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:06,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681181301] [2023-04-02 15:49:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681181301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617003631] [2023-04-02 15:49:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:06,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:06,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:49:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:06,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:49:06,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 15:49:06,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:06,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617003631] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:06,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788562645] [2023-04-02 15:49:06,830 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-04-02 15:49:06,830 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:06,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:06,831 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:06,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:06,847 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:07,007 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 15:49:07,025 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 16 for LOIs [2023-04-02 15:49:07,041 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:07,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:07,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:08,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4615#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:08,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:08,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-04-02 15:49:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426362426] [2023-04-02 15:49:08,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 15:49:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 15:49:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 15:49:08,446 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:49:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:08,756 INFO L93 Difference]: Finished difference Result 239 states and 339 transitions. [2023-04-02 15:49:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 15:49:08,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 59 [2023-04-02 15:49:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:08,758 INFO L225 Difference]: With dead ends: 239 [2023-04-02 15:49:08,759 INFO L226 Difference]: Without dead ends: 194 [2023-04-02 15:49:08,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=2827, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 15:49:08,761 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:08,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 228 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:49:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-04-02 15:49:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 98. [2023-04-02 15:49:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 81 states have internal predecessors, (99), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 15:49:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2023-04-02 15:49:08,789 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 59 [2023-04-02 15:49:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:08,789 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2023-04-02 15:49:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:49:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2023-04-02 15:49:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 15:49:08,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:08,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:08,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:08,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:08,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:08,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1137088221, now seen corresponding path program 2 times [2023-04-02 15:49:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482748094] [2023-04-02 15:49:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:49:09,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482748094] [2023-04-02 15:49:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482748094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498991369] [2023-04-02 15:49:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:49:09,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:09,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:09,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:49:09,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-02 15:49:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:09,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 15:49:09,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 15:49:09,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:49:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498991369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:49:09,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:49:09,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-04-02 15:49:09,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044734946] [2023-04-02 15:49:09,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:49:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 15:49:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 15:49:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-04-02 15:49:09,585 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:49:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:09,951 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2023-04-02 15:49:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 15:49:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2023-04-02 15:49:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:09,952 INFO L225 Difference]: With dead ends: 112 [2023-04-02 15:49:09,952 INFO L226 Difference]: Without dead ends: 105 [2023-04-02 15:49:09,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-04-02 15:49:09,953 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:09,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 521 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:49:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-02 15:49:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2023-04-02 15:49:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.2625) internal successors, (101), 84 states have internal predecessors, (101), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-04-02 15:49:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2023-04-02 15:49:09,976 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 62 [2023-04-02 15:49:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:09,976 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2023-04-02 15:49:09,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:49:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2023-04-02 15:49:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 15:49:09,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:09,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:09,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:10,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 15:49:10,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:10,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash -926394341, now seen corresponding path program 1 times [2023-04-02 15:49:10,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:10,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784601807] [2023-04-02 15:49:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:10,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:10,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784601807] [2023-04-02 15:49:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784601807] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725530264] [2023-04-02 15:49:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:10,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:10,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:10,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:49:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:10,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-02 15:49:10,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:49:11,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:12,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725530264] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:12,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329669205] [2023-04-02 15:49:12,961 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-04-02 15:49:12,961 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:12,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:12,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:12,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:12,975 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:13,101 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:49:13,113 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:49:13,122 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:13,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:13,200 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:14,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6091#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:14,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:14,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22, 23] total 49 [2023-04-02 15:49:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524446851] [2023-04-02 15:49:14,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:14,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 15:49:14,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 15:49:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4638, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 15:49:14,695 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 15:49:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:19,069 INFO L93 Difference]: Finished difference Result 310 states and 512 transitions. [2023-04-02 15:49:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-04-02 15:49:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) Word has length 62 [2023-04-02 15:49:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:19,071 INFO L225 Difference]: With dead ends: 310 [2023-04-02 15:49:19,071 INFO L226 Difference]: Without dead ends: 257 [2023-04-02 15:49:19,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1801, Invalid=17105, Unknown=0, NotChecked=0, Total=18906 [2023-04-02 15:49:19,077 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 420 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:19,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 988 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 15:49:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-04-02 15:49:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 102. [2023-04-02 15:49:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.25) internal successors, (100), 84 states have internal predecessors, (100), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-04-02 15:49:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2023-04-02 15:49:19,137 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 62 [2023-04-02 15:49:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:19,137 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2023-04-02 15:49:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 15:49:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2023-04-02 15:49:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 15:49:19,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:19,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:19,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:19,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:19,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:19,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash 901733050, now seen corresponding path program 2 times [2023-04-02 15:49:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:19,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120947214] [2023-04-02 15:49:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:49:19,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120947214] [2023-04-02 15:49:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120947214] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210368517] [2023-04-02 15:49:19,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:49:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:19,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:19,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 15:49:19,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:49:19,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:19,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 15:49:19,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-02 15:49:19,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:49:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210368517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:49:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:49:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2023-04-02 15:49:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685552162] [2023-04-02 15:49:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:49:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 15:49:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 15:49:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-04-02 15:49:19,766 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:49:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:19,924 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2023-04-02 15:49:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 15:49:19,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-04-02 15:49:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:19,933 INFO L225 Difference]: With dead ends: 124 [2023-04-02 15:49:19,933 INFO L226 Difference]: Without dead ends: 117 [2023-04-02 15:49:19,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-04-02 15:49:19,934 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:19,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 479 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:49:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-02 15:49:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2023-04-02 15:49:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 90 states have internal predecessors, (105), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2023-04-02 15:49:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2023-04-02 15:49:19,966 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 66 [2023-04-02 15:49:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:19,966 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2023-04-02 15:49:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:49:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2023-04-02 15:49:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 15:49:19,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:19,967 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:20,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 15:49:20,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:20,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 4710594, now seen corresponding path program 1 times [2023-04-02 15:49:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461160733] [2023-04-02 15:49:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:20,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461160733] [2023-04-02 15:49:20,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461160733] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:20,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479262055] [2023-04-02 15:49:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:20,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:20,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 15:49:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:20,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 15:49:20,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:49:20,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479262055] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796363301] [2023-04-02 15:49:20,842 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 15:49:20,842 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:20,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:20,842 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:20,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:20,855 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:21,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-02 15:49:21,010 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:49:21,078 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:21,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:21,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:22,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7834#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:22,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:22,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:22,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-04-02 15:49:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733749494] [2023-04-02 15:49:22,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 15:49:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 15:49:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1681, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:49:22,213 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 15:49:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:30,145 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2023-04-02 15:49:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 15:49:30,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 66 [2023-04-02 15:49:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:30,147 INFO L225 Difference]: With dead ends: 252 [2023-04-02 15:49:30,147 INFO L226 Difference]: Without dead ends: 184 [2023-04-02 15:49:30,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=552, Invalid=2527, Unknown=1, NotChecked=0, Total=3080 [2023-04-02 15:49:30,148 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 104 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:30,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 433 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:49:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-02 15:49:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 107. [2023-04-02 15:49:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 88 states have internal predecessors, (100), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-04-02 15:49:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2023-04-02 15:49:30,179 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 66 [2023-04-02 15:49:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:30,179 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2023-04-02 15:49:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 15:49:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2023-04-02 15:49:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 15:49:30,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:30,180 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:30,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 15:49:30,386 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:30,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash 107312201, now seen corresponding path program 2 times [2023-04-02 15:49:30,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:30,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713998344] [2023-04-02 15:49:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:30,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:30,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:30,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713998344] [2023-04-02 15:49:30,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713998344] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:30,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040984221] [2023-04-02 15:49:30,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:49:30,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:30,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:30,615 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:30,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 15:49:30,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-04-02 15:49:30,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:30,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 15:49:30,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 15:49:30,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:31,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040984221] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:31,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023122331] [2023-04-02 15:49:31,296 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-04-02 15:49:31,296 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:31,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:31,297 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:31,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:31,311 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:31,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-02 15:49:31,473 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 16 for LOIs [2023-04-02 15:49:31,482 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:31,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:31,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:32,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8894#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:32,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:32,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-04-02 15:49:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550971740] [2023-04-02 15:49:32,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-02 15:49:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-02 15:49:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3900, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 15:49:32,886 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:49:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:33,459 INFO L93 Difference]: Finished difference Result 391 states and 566 transitions. [2023-04-02 15:49:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-02 15:49:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2023-04-02 15:49:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:33,463 INFO L225 Difference]: With dead ends: 391 [2023-04-02 15:49:33,463 INFO L226 Difference]: Without dead ends: 334 [2023-04-02 15:49:33,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1259, Invalid=5383, Unknown=0, NotChecked=0, Total=6642 [2023-04-02 15:49:33,464 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 342 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:33,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 226 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:49:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-02 15:49:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 139. [2023-04-02 15:49:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 120 states have internal predecessors, (141), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-04-02 15:49:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2023-04-02 15:49:33,517 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 77 [2023-04-02 15:49:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:33,517 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2023-04-02 15:49:33,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-02 15:49:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2023-04-02 15:49:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 15:49:33,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:33,518 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:49:33,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:33,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 15:49:33,724 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:33,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -561573646, now seen corresponding path program 3 times [2023-04-02 15:49:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861060166] [2023-04-02 15:49:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 3 proven. 205 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:49:34,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861060166] [2023-04-02 15:49:34,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861060166] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321084159] [2023-04-02 15:49:34,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:49:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:34,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:49:34,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 15:49:34,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:49:34,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:34,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-02 15:49:34,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 2 proven. 214 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:49:34,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 205 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 15:49:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321084159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859686117] [2023-04-02 15:49:36,310 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-04-02 15:49:36,310 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:36,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:36,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:36,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:36,324 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:36,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:49:36,464 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:49:36,471 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:36,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:36,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:39,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10280#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:39,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:39,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 24] total 62 [2023-04-02 15:49:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332389902] [2023-04-02 15:49:39,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:39,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-04-02 15:49:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-04-02 15:49:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=6442, Unknown=0, NotChecked=0, Total=6972 [2023-04-02 15:49:39,881 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand has 62 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 15:50:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:50:59,765 INFO L93 Difference]: Finished difference Result 598 states and 1110 transitions. [2023-04-02 15:50:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 15:50:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) Word has length 82 [2023-04-02 15:50:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:50:59,769 INFO L225 Difference]: With dead ends: 598 [2023-04-02 15:50:59,769 INFO L226 Difference]: Without dead ends: 538 [2023-04-02 15:50:59,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 171 SyntacticMatches, 24 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25943 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=9917, Invalid=67089, Unknown=0, NotChecked=0, Total=77006 [2023-04-02 15:50:59,778 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1690 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 5386 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 5631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 5386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-02 15:50:59,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 1452 Invalid, 5631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 5386 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-02 15:50:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-04-02 15:50:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 158. [2023-04-02 15:50:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 131 states have (on average 1.2366412213740459) internal successors, (162), 136 states have internal predecessors, (162), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2023-04-02 15:50:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 205 transitions. [2023-04-02 15:50:59,870 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 205 transitions. Word has length 82 [2023-04-02 15:50:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:50:59,871 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 205 transitions. [2023-04-02 15:50:59,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 15:50:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 205 transitions. [2023-04-02 15:50:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-02 15:50:59,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:50:59,872 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:50:59,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 15:51:00,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 15:51:00,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:51:00,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:51:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash 555784967, now seen corresponding path program 2 times [2023-04-02 15:51:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:51:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512153454] [2023-04-02 15:51:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:51:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:51:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:51:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 3 proven. 243 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:51:00,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:51:00,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512153454] [2023-04-02 15:51:00,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512153454] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:51:00,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182775698] [2023-04-02 15:51:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:51:00,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:51:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:51:00,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:51:00,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 15:51:09,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-02 15:51:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:51:09,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-02 15:51:09,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:51:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 5 proven. 252 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:51:11,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:51:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 15 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 15:51:16,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182775698] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:51:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339555858] [2023-04-02 15:51:16,667 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-04-02 15:51:16,667 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:51:16,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:51:16,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:51:16,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:51:16,681 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:51:16,803 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:51:16,811 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:51:16,818 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:51:16,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:51:16,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:51:19,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12428#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:51:19,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:51:19,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:51:19,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 39, 38] total 90 [2023-04-02 15:51:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793163867] [2023-04-02 15:51:19,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:51:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-04-02 15:51:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:51:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-04-02 15:51:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=11648, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 15:51:19,427 INFO L87 Difference]: Start difference. First operand 158 states and 205 transitions. Second operand has 90 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 81 states have internal predecessors, (194), 10 states have call successors, (17), 3 states have call predecessors, (17), 10 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2023-04-02 15:52:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:52:37,649 INFO L93 Difference]: Finished difference Result 644 states and 1355 transitions. [2023-04-02 15:52:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2023-04-02 15:52:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 81 states have internal predecessors, (194), 10 states have call successors, (17), 3 states have call predecessors, (17), 10 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) Word has length 89 [2023-04-02 15:52:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:52:37,654 INFO L225 Difference]: With dead ends: 644 [2023-04-02 15:52:37,655 INFO L226 Difference]: Without dead ends: 585 [2023-04-02 15:52:37,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26165 ImplicationChecksByTransitivity, 77.2s TimeCoverageRelationStatistics Valid=10039, Invalid=78467, Unknown=0, NotChecked=0, Total=88506 [2023-04-02 15:52:37,662 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2209 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 7990 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2353 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 8610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 7990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:52:37,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2353 Valid, 1840 Invalid, 8610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 7990 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-02 15:52:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-04-02 15:52:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 178. [2023-04-02 15:52:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 146 states have (on average 1.2397260273972603) internal successors, (181), 153 states have internal predecessors, (181), 19 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (45), 17 states have call predecessors, (45), 17 states have call successors, (45) [2023-04-02 15:52:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 245 transitions. [2023-04-02 15:52:37,860 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 245 transitions. Word has length 89 [2023-04-02 15:52:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:52:37,860 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 245 transitions. [2023-04-02 15:52:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 81 states have internal predecessors, (194), 10 states have call successors, (17), 3 states have call predecessors, (17), 10 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2023-04-02 15:52:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 245 transitions. [2023-04-02 15:52:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-02 15:52:37,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:52:37,861 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:52:37,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 15:52:38,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:52:38,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:52:38,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:52:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2073819541, now seen corresponding path program 4 times [2023-04-02 15:52:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:52:38,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305469370] [2023-04-02 15:52:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:52:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:52:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 3 proven. 324 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 15:52:38,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:52:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305469370] [2023-04-02 15:52:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305469370] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:52:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385163684] [2023-04-02 15:52:38,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:52:38,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:52:38,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:52:38,521 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:52:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 15:52:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:52:38,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 84 conjunts are in the unsatisfiable core [2023-04-02 15:52:38,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:52:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 2 proven. 333 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:52:39,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:52:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 3 proven. 324 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 15:52:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385163684] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:52:42,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158432200] [2023-04-02 15:52:42,437 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-04-02 15:52:42,437 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:52:42,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:52:42,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:52:42,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:52:42,446 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:52:42,584 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:52:42,596 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 9 for LOIs [2023-04-02 15:52:42,607 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:52:42,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:52:42,688 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:52:47,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14696#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:52:47,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:52:47,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:52:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32, 33] total 79 [2023-04-02 15:52:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407355461] [2023-04-02 15:52:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:52:47,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-04-02 15:52:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:52:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-04-02 15:52:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=9419, Unknown=0, NotChecked=0, Total=10100 [2023-04-02 15:52:47,496 INFO L87 Difference]: Start difference. First operand 178 states and 245 transitions. Second operand has 79 states, 69 states have (on average 2.7681159420289854) internal successors, (191), 71 states have internal predecessors, (191), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-02 15:52:54,349 WARN L223 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)