./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:29:30,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:29:30,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:29:30,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:29:30,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:29:30,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:29:30,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:29:30,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:29:30,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:29:30,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:29:30,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:29:30,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:29:30,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:29:30,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:29:30,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:29:30,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:29:30,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:29:30,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:29:30,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:29:30,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:29:30,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:29:30,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:29:30,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:29:30,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:29:30,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:29:30,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:29:30,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:29:30,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:29:30,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:29:30,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:29:30,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:29:30,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:29:30,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:29:30,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:29:30,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:29:30,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:29:30,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:29:30,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:29:30,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:29:30,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:29:30,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:29:30,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:29:30,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:29:30,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:29:30,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:29:30,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:29:30,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:29:30,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:29:30,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:29:30,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:29:30,758 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:29:30,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:29:30,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:29:30,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:29:30,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:29:30,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:29:30,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:29:30,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:29:30,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:29:30,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:29:30,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:29:30,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:29:30,762 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:29:30,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:29:30,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:29:30,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:29:30,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2021-12-17 21:29:30,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:29:30,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:29:30,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:29:30,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:29:30,981 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:29:30,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:31,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53752a235/7b1ebee2007e47948dc64c63062084e5/FLAG3a262f4fc [2021-12-17 21:29:31,360 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:29:31,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:31,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53752a235/7b1ebee2007e47948dc64c63062084e5/FLAG3a262f4fc [2021-12-17 21:29:31,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53752a235/7b1ebee2007e47948dc64c63062084e5 [2021-12-17 21:29:31,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:29:31,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:29:31,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:29:31,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:29:31,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:29:31,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:31,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297980b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31, skipping insertion in model container [2021-12-17 21:29:31,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:31,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:29:31,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:29:31,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-12-17 21:29:31,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-12-17 21:29:31,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:29:31,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:29:31,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-12-17 21:29:31,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-12-17 21:29:31,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:29:31,989 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:29:31,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31 WrapperNode [2021-12-17 21:29:31,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:29:31,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:29:31,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:29:31,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:29:31,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,015 INFO L137 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2021-12-17 21:29:32,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:29:32,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:29:32,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:29:32,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:29:32,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:29:32,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:29:32,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:29:32,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:29:32,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (1/1) ... [2021-12-17 21:29:32,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:29:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:29:32,076 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) [2021-12-17 21:29:32,078 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 [2021-12-17 21:29:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:29:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:29:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:29:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:29:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:29:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:29:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:29:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:29:32,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:29:32,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:29:32,352 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:29:32,356 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:29:32,357 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:29:32,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:29:32 BoogieIcfgContainer [2021-12-17 21:29:32,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:29:32,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:29:32,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:29:32,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:29:32,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:29:31" (1/3) ... [2021-12-17 21:29:32,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0962a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:29:32, skipping insertion in model container [2021-12-17 21:29:32,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:31" (2/3) ... [2021-12-17 21:29:32,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0962a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:29:32, skipping insertion in model container [2021-12-17 21:29:32,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:29:32" (3/3) ... [2021-12-17 21:29:32,371 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:32,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:29:32,376 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:29:32,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:29:32,434 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:29:32,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:29:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 21:29:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:29:32,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:29:32,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:29:32,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:29:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:29:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:29:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:29:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171333972] [2021-12-17 21:29:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:29:32,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:29:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:29:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:29:32,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:29:32,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171333972] [2021-12-17 21:29:32,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171333972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:29:32,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:29:32,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:29:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737904616] [2021-12-17 21:29:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:29:32,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:29:32,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:29:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:29:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:29:32,576 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:29:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:29:32,592 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-17 21:29:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:29:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:29:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:29:32,598 INFO L225 Difference]: With dead ends: 115 [2021-12-17 21:29:32,598 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 21:29:32,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:29:32,603 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:29:32,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:29:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 21:29:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-17 21:29:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:29:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-17 21:29:32,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-17 21:29:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:29:32,638 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-17 21:29:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:29:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-17 21:29:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:29:32,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:29:32,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:29:32,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:29:32,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:29:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:29:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:29:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:29:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207395168] [2021-12-17 21:29:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:29:32,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:29:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:29:32,658 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 21:29:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 21:29:32,692 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 21:29:32,693 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 21:29:32,694 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 21:29:32,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-17 21:29:32,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:29:32,698 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-17 21:29:32,700 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 21:29:32,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:29:32 BoogieIcfgContainer [2021-12-17 21:29:32,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 21:29:32,717 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 21:29:32,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 21:29:32,718 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 21:29:32,718 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:29:32" (3/4) ... [2021-12-17 21:29:32,720 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 21:29:32,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 21:29:32,721 INFO L158 Benchmark]: Toolchain (without parser) took 946.54ms. Allocated memory is still 109.1MB. Free memory was 72.9MB in the beginning and 81.0MB in the end (delta: -8.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:29:32,722 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:29:32,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.67ms. Allocated memory is still 109.1MB. Free memory was 72.7MB in the beginning and 82.0MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 21:29:32,725 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.81ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 80.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 21:29:32,725 INFO L158 Benchmark]: Boogie Preprocessor took 28.86ms. Allocated memory is still 109.1MB. Free memory was 80.2MB in the beginning and 78.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:29:32,727 INFO L158 Benchmark]: RCFGBuilder took 309.46ms. Allocated memory is still 109.1MB. Free memory was 78.5MB in the beginning and 64.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 21:29:32,727 INFO L158 Benchmark]: TraceAbstraction took 357.89ms. Allocated memory is still 109.1MB. Free memory was 64.5MB in the beginning and 81.0MB in the end (delta: -16.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:29:32,728 INFO L158 Benchmark]: Witness Printer took 2.87ms. Allocated memory is still 109.1MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 21:29:32,732 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory was 89.3MB in the beginning and 89.2MB in the end (delta: 78.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.67ms. Allocated memory is still 109.1MB. Free memory was 72.7MB in the beginning and 82.0MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.81ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 80.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.86ms. Allocated memory is still 109.1MB. Free memory was 80.2MB in the beginning and 78.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 309.46ms. Allocated memory is still 109.1MB. Free memory was 78.5MB in the beginning and 64.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 357.89ms. Allocated memory is still 109.1MB. Free memory was 64.5MB in the beginning and 81.0MB in the end (delta: -16.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.87ms. Allocated memory is still 109.1MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.399f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 60 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 81 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-17 21:29:32,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:29:34,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:29:34,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:29:34,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:29:34,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:29:34,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:29:34,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:29:34,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:29:34,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:29:34,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:29:34,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:29:34,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:29:34,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:29:34,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:29:34,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:29:34,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:29:34,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:29:34,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:29:34,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:29:34,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:29:34,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:29:34,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:29:34,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:29:34,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:29:34,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:29:34,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:29:34,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:29:34,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:29:34,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:29:34,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:29:34,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:29:34,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:29:34,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:29:34,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:29:34,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:29:34,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:29:34,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:29:34,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:29:34,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:29:34,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:29:34,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:29:34,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 21:29:34,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:29:34,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:29:34,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:29:34,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:29:34,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:29:34,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:29:34,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:29:34,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:29:34,492 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:29:34,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:29:34,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:29:34,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:29:34,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:29:34,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:29:34,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:29:34,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:29:34,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:29:34,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:29:34,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:29:34,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:29:34,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:29:34,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:29:34,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:29:34,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:29:34,502 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:29:34,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 21:29:34,504 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2021-12-17 21:29:34,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:29:34,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:29:34,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:29:34,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:29:34,750 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:29:34,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:34,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca97a0e4/812f0da34cf143fcbdec778e0ccc1f96/FLAGb0a5736f8 [2021-12-17 21:29:35,177 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:29:35,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:35,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca97a0e4/812f0da34cf143fcbdec778e0ccc1f96/FLAGb0a5736f8 [2021-12-17 21:29:35,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca97a0e4/812f0da34cf143fcbdec778e0ccc1f96 [2021-12-17 21:29:35,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:29:35,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:29:35,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:29:35,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:29:35,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:29:35,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a59975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35, skipping insertion in model container [2021-12-17 21:29:35,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:29:35,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:29:35,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-12-17 21:29:35,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-12-17 21:29:35,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:29:35,476 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:29:35,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2021-12-17 21:29:35,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2021-12-17 21:29:35,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:29:35,524 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:29:35,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35 WrapperNode [2021-12-17 21:29:35,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:29:35,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:29:35,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:29:35,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:29:35,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,571 INFO L137 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2021-12-17 21:29:35,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:29:35,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:29:35,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:29:35,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:29:35,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:29:35,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:29:35,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:29:35,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:29:35,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (1/1) ... [2021-12-17 21:29:35,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:29:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:29:35,646 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) [2021-12-17 21:29:35,664 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 [2021-12-17 21:29:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:29:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 21:29:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-17 21:29:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-17 21:29:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:29:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:29:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 21:29:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 21:29:35,744 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:29:35,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:29:38,190 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:29:38,194 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:29:38,194 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 21:29:38,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:29:38 BoogieIcfgContainer [2021-12-17 21:29:38,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:29:38,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:29:38,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:29:38,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:29:38,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:29:35" (1/3) ... [2021-12-17 21:29:38,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:29:38, skipping insertion in model container [2021-12-17 21:29:38,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:29:35" (2/3) ... [2021-12-17 21:29:38,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:29:38, skipping insertion in model container [2021-12-17 21:29:38,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:29:38" (3/3) ... [2021-12-17 21:29:38,201 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2021-12-17 21:29:38,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:29:38,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:29:38,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:29:38,237 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:29:38,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:29:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 21:29:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:29:38,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:29:38,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:29:38,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:29:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:29:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-12-17 21:29:38,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:29:38,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110459195] [2021-12-17 21:29:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:29:38,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:29:38,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:29:38,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:29:38,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 21:29:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:29:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 21:29:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:29:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:29:38,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:29:38,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:29:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110459195] [2021-12-17 21:29:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110459195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:29:38,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:29:38,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 21:29:38,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654568988] [2021-12-17 21:29:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:29:38,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 21:29:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:29:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 21:29:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:29:38,727 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:29:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:29:38,751 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2021-12-17 21:29:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 21:29:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:29:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:29:38,758 INFO L225 Difference]: With dead ends: 115 [2021-12-17 21:29:38,759 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 21:29:38,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 21:29:38,764 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:29:38,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:29:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 21:29:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-17 21:29:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:29:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-12-17 21:29:38,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2021-12-17 21:29:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:29:38,800 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-12-17 21:29:38,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:29:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-12-17 21:29:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 21:29:38,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:29:38,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:29:38,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:29:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:29:39,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:29:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:29:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-12-17 21:29:39,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:29:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314211395] [2021-12-17 21:29:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:29:39,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:29:39,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:29:39,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:29:39,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 21:42:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:42:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:42:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:43:07,852 WARN L227 SmtUtils]: Spent 10.59s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 21:43:57,150 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from false [2021-12-17 21:43:59,209 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) is different from true [2021-12-17 21:43:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:43:59,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:43:59,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:43:59,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314211395] [2021-12-17 21:43:59,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314211395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:43:59,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:43:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:43:59,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99064721] [2021-12-17 21:43:59,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:43:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:43:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:43:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:43:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=13, Unknown=7, NotChecked=8, Total=42 [2021-12-17 21:43:59,212 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:44:05,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 21:44:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:05,959 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-12-17 21:44:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:44:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 21:44:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:05,961 INFO L225 Difference]: With dead ends: 51 [2021-12-17 21:44:05,961 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 21:44:05,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=19, Invalid=18, Unknown=9, NotChecked=10, Total=56 [2021-12-17 21:44:05,962 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:05,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.4s Time] [2021-12-17 21:44:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 21:44:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 21:44:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 21:44:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2021-12-17 21:44:05,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2021-12-17 21:44:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:05,967 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2021-12-17 21:44:05,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 21:44:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2021-12-17 21:44:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 21:44:05,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:05,969 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:06,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:06,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2021-12-17 21:44:06,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:06,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331686179] [2021-12-17 21:44:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:06,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:06,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:06,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:06,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 21:44:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:06,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:44:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:06,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:44:06,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:06,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331686179] [2021-12-17 21:44:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331686179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:44:06,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:44:06,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:44:06,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240803162] [2021-12-17 21:44:06,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:44:06,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:44:06,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:44:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:44:06,502 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:06,811 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2021-12-17 21:44:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:44:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-12-17 21:44:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:06,815 INFO L225 Difference]: With dead ends: 102 [2021-12-17 21:44:06,815 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 21:44:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:44:06,817 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:06,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:44:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 21:44:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-12-17 21:44:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-17 21:44:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-12-17 21:44:06,827 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2021-12-17 21:44:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:06,827 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-12-17 21:44:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-12-17 21:44:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:44:06,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:06,828 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:06,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:07,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:07,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2021-12-17 21:44:07,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:07,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39242482] [2021-12-17 21:44:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:07,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:07,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:07,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:07,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 21:44:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:44:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:07,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:44:07,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39242482] [2021-12-17 21:44:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39242482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:44:07,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:44:07,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:44:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935084030] [2021-12-17 21:44:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:44:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:44:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:44:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:44:07,406 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:07,688 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2021-12-17 21:44:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:44:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2021-12-17 21:44:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:07,690 INFO L225 Difference]: With dead ends: 106 [2021-12-17 21:44:07,690 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 21:44:07,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:44:07,692 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:07,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:44:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 21:44:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-12-17 21:44:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:44:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2021-12-17 21:44:07,699 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2021-12-17 21:44:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:07,699 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2021-12-17 21:44:07,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2021-12-17 21:44:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 21:44:07,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:07,700 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:07,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-17 21:44:07,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:07,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2021-12-17 21:44:07,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:07,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970442896] [2021-12-17 21:44:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:07,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:07,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:07,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 21:44:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:44:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:08,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:44:08,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970442896] [2021-12-17 21:44:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970442896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:44:08,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:44:08,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:44:08,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715067932] [2021-12-17 21:44:08,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:44:08,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:44:08,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:44:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:44:08,237 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:08,547 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2021-12-17 21:44:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:44:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-17 21:44:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:08,548 INFO L225 Difference]: With dead ends: 115 [2021-12-17 21:44:08,548 INFO L226 Difference]: Without dead ends: 67 [2021-12-17 21:44:08,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:44:08,549 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:08,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:44:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-17 21:44:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-12-17 21:44:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:44:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-17 21:44:08,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2021-12-17 21:44:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:08,556 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-17 21:44:08,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-17 21:44:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 21:44:08,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:08,557 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:08,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:08,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:08,760 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2021-12-17 21:44:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877484188] [2021-12-17 21:44:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:08,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:08,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:08,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:08,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 21:44:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:08,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:44:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:09,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:44:09,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877484188] [2021-12-17 21:44:09,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877484188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:44:09,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:44:09,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:44:09,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007807317] [2021-12-17 21:44:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:44:09,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:44:09,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:44:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:44:09,141 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:09,661 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2021-12-17 21:44:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:44:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-12-17 21:44:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:09,662 INFO L225 Difference]: With dead ends: 123 [2021-12-17 21:44:09,663 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 21:44:09,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:44:09,664 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:44:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 21:44:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-12-17 21:44:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:44:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2021-12-17 21:44:09,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2021-12-17 21:44:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:09,678 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2021-12-17 21:44:09,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 21:44:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2021-12-17 21:44:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 21:44:09,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:09,679 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:09,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:09,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:09,886 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2021-12-17 21:44:09,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:09,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552296301] [2021-12-17 21:44:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:09,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:09,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:09,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 21:44:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:09,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 21:44:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:10,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:44:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:44:10,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552296301] [2021-12-17 21:44:10,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552296301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:44:10,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:44:10,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 21:44:10,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259158631] [2021-12-17 21:44:10,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:44:10,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:44:10,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:44:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:44:10,870 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:11,703 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2021-12-17 21:44:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:44:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-17 21:44:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:11,705 INFO L225 Difference]: With dead ends: 144 [2021-12-17 21:44:11,705 INFO L226 Difference]: Without dead ends: 94 [2021-12-17 21:44:11,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:44:11,706 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:11,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 285 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:44:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-17 21:44:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2021-12-17 21:44:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 58 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:44:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-12-17 21:44:11,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 48 [2021-12-17 21:44:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:11,713 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-12-17 21:44:11,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-12-17 21:44:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 21:44:11,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:11,714 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 21:44:11,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:11,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:11,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash -588856565, now seen corresponding path program 1 times [2021-12-17 21:44:11,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:11,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254460287] [2021-12-17 21:44:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:11,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:11,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:11,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 21:44:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:44:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:44:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:44:13,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254460287] [2021-12-17 21:44:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254460287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:44:13,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:44:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 21:44:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124654155] [2021-12-17 21:44:13,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:44:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:44:13,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:44:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:44:13,108 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:14,324 INFO L93 Difference]: Finished difference Result 162 states and 234 transitions. [2021-12-17 21:44:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:44:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-12-17 21:44:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:14,325 INFO L225 Difference]: With dead ends: 162 [2021-12-17 21:44:14,325 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 21:44:14,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:44:14,326 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:14,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 250 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:44:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 21:44:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2021-12-17 21:44:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 62 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:44:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2021-12-17 21:44:14,334 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 50 [2021-12-17 21:44:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:14,334 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2021-12-17 21:44:14,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2021-12-17 21:44:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 21:44:14,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:14,336 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2021-12-17 21:44:14,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:14,546 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1889085224, now seen corresponding path program 2 times [2021-12-17 21:44:14,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999443418] [2021-12-17 21:44:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 21:44:14,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:14,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:14,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 21:44:14,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 21:44:14,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 21:44:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:44:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-17 21:44:14,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:44:14,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999443418] [2021-12-17 21:44:14,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999443418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:44:14,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:44:14,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:44:14,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684310406] [2021-12-17 21:44:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:44:14,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:44:14,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:44:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:44:14,854 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:44:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:15,047 INFO L93 Difference]: Finished difference Result 110 states and 159 transitions. [2021-12-17 21:44:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:44:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-17 21:44:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:15,048 INFO L225 Difference]: With dead ends: 110 [2021-12-17 21:44:15,048 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 21:44:15,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:44:15,049 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:15,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 297 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:44:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 21:44:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-12-17 21:44:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 70 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:44:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 113 transitions. [2021-12-17 21:44:15,056 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 113 transitions. Word has length 57 [2021-12-17 21:44:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:15,056 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 113 transitions. [2021-12-17 21:44:15,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 21:44:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 113 transitions. [2021-12-17 21:44:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 21:44:15,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:15,057 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2021-12-17 21:44:15,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-17 21:44:15,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:15,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1704817494, now seen corresponding path program 1 times [2021-12-17 21:44:15,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:15,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331975652] [2021-12-17 21:44:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:15,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:15,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:15,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:15,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 21:44:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:15,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:44:15,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:44:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 21:44:15,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:44:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 21:44:17,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 21:44:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331975652] [2021-12-17 21:44:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331975652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:44:17,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:44:17,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 21:44:17,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306202234] [2021-12-17 21:44:17,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 21:44:17,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 21:44:17,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 21:44:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 21:44:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:44:17,151 INFO L87 Difference]: Start difference. First operand 79 states and 113 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:44:19,844 INFO L93 Difference]: Finished difference Result 221 states and 318 transitions. [2021-12-17 21:44:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 21:44:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-12-17 21:44:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:44:19,846 INFO L225 Difference]: With dead ends: 221 [2021-12-17 21:44:19,847 INFO L226 Difference]: Without dead ends: 150 [2021-12-17 21:44:19,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-12-17 21:44:19,848 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 178 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:44:19,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 505 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 21:44:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-17 21:44:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 93. [2021-12-17 21:44:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 84 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 21:44:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2021-12-17 21:44:19,857 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 57 [2021-12-17 21:44:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:44:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2021-12-17 21:44:19,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:44:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2021-12-17 21:44:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:44:19,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:44:19,858 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 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] [2021-12-17 21:44:19,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 21:44:20,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 21:44:20,066 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:44:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:44:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash -848364147, now seen corresponding path program 1 times [2021-12-17 21:44:20,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 21:44:20,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613808576] [2021-12-17 21:44:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:44:20,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 21:44:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 21:44:20,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 21:44:20,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 21:44:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:44:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:44:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15